DCFluX in: License to Transmit

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When cell phones, land lines and the internet break down in a disaster, Amateur radio is there. Considered to be one of the earliest forms of Hacking, this talk will take a look at some of the things that can be done if you are a licensed amateur radio operator. Matt Krick "DCFluX" is Chief Engineer of New West Broadcasting Systems, Inc., Operators of broadcast stations KGMN-FM, KZKE-FM, KYET-AM and KKAX-LP. He has worked in the field of broadcasting since 1998, specializing in all aspects of broadcast engineering, video editing and electronics.

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well good morning Las Vegas it's great to be a winner and aren't we all well we've had a few technical difficulties with this presentation this morning first my presentation was on an iron key and Tuesday it decided to eat itself so there are a few glitches in the PowerPoint so if you see them try not to notice thank you and yeah but this laptop has already blue screen down me twice this morning so let's just keep our fingers crossed well a bit about me my name is Matt Crick my voice is my passport verify me I go by DC flux I was a teenage engineer from a video editor and I like to live on the edge a bit and hang out on towers there's a lot more fun than video editing at a console and if I can't make people laugh during my talks why am i bothering so chapter 1 is
going to get a lot of people's ruffle feathers ruffled because they are in love with their smartphones but let me let me tell you why I named it this this was because well I was putting these slides together the Boy Scouts of America were doing their youth Jamboree at our local Boy Scout camp and one of the things you can get as a Boy Scout is the radio merit badge so here I am explaining trying to explain to a kid just about in junior high you know how cool radio is and all that and he just sort of looks at me and yawns and pulls
out one of these well joke's on him because the camp is located in a cellular dead zone was spotty coverage at best but I was like you little bastard when I was your age my computer at the
time was a Commodore 64 the family's not mine mind you cellphone was this Panasonic bag phone here and couldn't find a battery for it but that's what it looked like cost about between two and three dollars a minute just to use the thing and it made calls and nothing else and the first you know if I wanted personal communications in the field my first radio was the yaesu ft 709 but you know so everyone you know got their
smartphone so they can make phone calls but guess what an amateur radio we've got that we have manual phone patch and we have Auto patch if you have a repeater we've got push-to-talk frequency modulated amplitude modulation digital modulation Oh a special note I didn't put D star on this I did not put D star on this slide because even though it's all kinds of fun an ip-based the audio quality is very lacking compared to p25 text messaging we got it we got Morse code teletype packet PSK what else we got pitcher mail we got flow scan television or you can send your pictures with packet we've got video chat you know full bandwidth six megahertz wide amateur television and we've got like three different versions of digital amateur television going right now and we've got location awareness we've got a PRS which you know is basically the amateur version of LoJack but I don't run it anymore because I don't want the Nerds knowing where I am we've got
internet access to on the 2.4 gigahertz band channels one through six fall in the ham band and that means as long as you don't exceed the bandwidth you know run like the full 22 megahertz wide on channel 6 and one you can run up 1,500 watts using a you know standard you know build amplifiers for standard off-the-shelf equipment on 5.7 gig channels 136 through 165 fall within the ham band so about the only thing we
don't have is an app store but we don't really need one because the vast majority of software written for amateur radio use is free art is shareware and the stuff that isn't is really affordable but you know we don't have an
evil empire of profiteering gluttons okay quick show of hands who in here is paying 50 a month for their smartphone bill I'll get to that all right so about half of you put that up who's paying 100 okay the numbers shrunk to about a quarter of the room but once you get your license and buy the equipment there are no further bills required with amateur radio my brother
and I had gotten our licenses on the same day and we were issued concurrent calls Paul was kc7 grz and I was kc7 GSA but because Paul was older he got the dual bandar and as I said earlier my first radio was an F T 709 so when I
told my dad I want to do a band or two like the FT 727 you know what I got he came up with the 2 meter radio the FT 209 and taped them together that was my first dual bender so I'm like oh what the but later he would come
up for me the ten would th seventy-seven I love this radio to death and I probably would be paralyzed right now if I didn't have it with me when I was hiking once because usually this one's a little big but usually when I'm out in the field I'll put the radio on my back like that but I fell off a cliff and use my th 77 for a landing gear and the whole front panel was damaged LCD cracked battery scuffed but you know what I turned it on and it still worked and I could make a call for help try that with your iPhone okay moving on to
amateur radio now a lot of people this slide was actually come quick comparison for commercial radio and television broadcasting well you know well it's really a pain in the butt to get one of these going it's like your lawyer fees I just got charged one hundred and sixty dollars for a five-minute phone call from this guy and then the bill showed up because I was changing a license to my name from another guy's name and it was about four or four grand maybe a little more then get your FCC fees which is at least 500 per application and then you got a fight for the right to get a license allocation which you know depending on the market and what you're going for is between thirty thousand and five million dollars such as ones for the Vegas market then you still got the equipment to buy and depending on the size of your transmitter it could be five thousand two one thousand 1 million dollars and that doesn't include any of the studio equipment then there's like the mandated emergency alert system stuff that's going to add at least three grand to your price tag then we got your ASCAP BMI and RI double-a fees who would think that the people that write the music actually want to get paid for it but anyways enter ham radio you just
have to pay for the exams and buy equipment and a lot of people fear amateur radio operators because they think the guy with the 75 foot tall tower a mile down the road from them it's interfering with their TV when in fact it's the citizens band operator with the 16 pill amplifier running Class C that lives behind them that gets into everything including the toaster and
what we're on that note citizens band is not amateur radio while you're smart C
beer is doing something like this our
radios have that feature built in from the factory and it always breaks my
heart when I see a good radio gone bad people beg and plead for me to repair their radios because apparently I am the only one in the tri-state area that knows how but when I turn it on and it comes up on a CB channel I get really mad it immediately goes back to the person unrepaired or i will impound it saying I can't you know it can't be fixed anymore and I'd like it for parts such as the case with this poor SP Keith
kit SB 200 this was butchered by some CB R to run the bias extra hard because he wanted quote more swang apparently that's some CB returned that indicates to how far they can make their want me to move so you know we got a we told the guy couldn't fix it anymore and we unmodified it so it lives happily once
again also FRS GMR s mers that's not
amateur radio either FRS you're limited to power and it's basically a UHF version of CB radio GM RS is a cheap way to get a commercial radio system going and I'm not even sure what MERS is I didn't have time to look it up so when you mention
ham radio people often associated with this stereotype of a bunch of fat guys sitting around I'd like to talk on the radio well I won't lie to you we've got that but the hobby offers so much more as well it's about teamwork on field day it's getting people interested in the hobby it's about learning how to solder
and build electronics it's about designing custom electronics for whatever application you may have it's about volunteering it's about putting up antennas and towers during the day it's hanging out on a tower during a windstorm to install a heliox connector and sometimes you have to go
up the tower at night it's a series of tubes sometimes you can experiment and make those tubes glow right in your hand it's
sometime it's some guys homemade arc welder it's using thermite so welt
it's collecting electronics and various
components and documentation in your bedroom it's collecting equipment in your car it's hiking up mountains for
better range it's talking through satellites in orbit for better range its
disaster preparedness it's being a trained weather spotter for the national weather service it's volunteering during
an actual disaster it's an adventure that requires four-wheel drive to get to and sometimes you need a Black Hawk
helicopter to get to it amateur radio can turn your girlfriend from this to this most of all amateur radio is about the things that I didn't have time to show you which you will just have to find out some of these on your own if you you know do take an interest but don't take my word for it here are some of the hams that you people may already know this is Jay k5z Charlie this is Bob
k2 AMH this is Joe wb6 ACU this is art
w6o BB this is Nolan w7d UK this is John
k2h EP this is Steve wa6 BND
this is Clifford k7 ta and this is Kevin
n6n HG moving right along the FCC is the
man established by the government to be the entity that taxes people for the use of the electromagnetic spectrum something that should otherwise be free but anyways these are the only people that have the authority to grant your license and to shut you down now you
don't know about the league the amateur radio relay League is ham radios version of the NRA they basically file legal petitions with the government on behalf of amateur radio operators and being a member gets you a free subscription to a magazine I
was going to say qst is like guns and ammo for hams but surprisingly that magazine wasn't owned by the NRA and
we've got some bands that were allowed to use you know this is the HF radio spectrum 160 meters through 10 meters 60 meters there is one of our newest bands and the thing there is we're not allowed to use that whole chunk there that is actually channelized into five channels and you're allowed upper sideband voice only with fifty watts Pat but I'll tell you it works excellent the 50 watts on a 12 foot whip is enough to talk from here to Arizona to the surrounding states easy both day and night here's our
higher bands six meters through thirteen centimeters what can I say we have and we've got more we've got places all over the place you know I I didn't show you all of our microwave bands but these are the most actively used ones because equipments readily available and you don't have to fight with dish alignment and what we're
on that note the narrower the bandwidth your emission is the longer you can make the range work
so at the top of this list is SSC w which stands for super slow carrier wave now the trick there is the ditz it's Morse code but the ditz are 10 seconds long each and the DAWs are 30 seconds long but because they're that slow you know you need special equipment to decode it running 5 watts looks like 50,000 on the other end Wi-Fi data here you know it depends on which mode data you run maybe one megahertz to twenty two megahertz wide which is why you might have trouble trying to make that work through a wall without antenna game but yeah oh also FM phone here commercial handheld radios have gone from 16 kilohertz to 8 and I have seen 20 and 50 kilohertz mm phone on ham but it isn't often because a lot of that equipment was left over from the first golden age and I'll get to that slide here in a minute but one of the nice
things about amateur radio build-your-own mode and you know super slow analog data analog HDTV that worked that was actually three cable television modulators on 57 58 and 59 combined ran through an app and decoded on three VHS decks but with all things some
restrictions do apply you have to give your callsign at the beginning and end in every ten minutes you're not allowed to obscure the meaning of communications like hey I put that thing in that place for you that one time no encryption unless you're commanding a satellite no broadcasting so that means that you have to talk to somebody unless it is a qst as in the case of amateur radio news line no music unless it's part of a NASA rebroadcast of course the last shuttle mission was a couple of weeks ago so I kind of think that one's not really going to apply for a while oh and you're not allowed to use the seven dirty words but the swearing thing is also dependent on the moral standards of the community such as the cases in the Los Angeles basin but remember to give your callsign first if you want to test the waters and if someone will report you to the FCC so in short don't be an ass hat on amateur
radio and you'll get along with it just fine if you have to take your shenanigans down to CB where they belong here's the good stuff 1500 watts pep on
most bands with a few restrictions like I said 50 watts on 60 meters which is easy out of a mobile radio 200 watts pep on 30 meters and also 30 meters is a CW only band and 50 watts pep on 70 centimeters which is UHF in some locations and that's a pay of pause thing and I'll get to that later but the nice thing is you can run unlimited ERP you can like I said build your own mode they're allowed on all bands except the pulse and spread spectrum ones are limited to pretty much 900 megahertz and above because of those are the bands that have a lot of bandwidth to them and also you know unlimited you know as long as your mission falls within the amateur radio bands you can have as much bandwidth as you want on 900 megahertz what I talked about in the last slide
was pep peak envelope power that's the power leaving your transmitter terminals and it's peak because sideband and a.m. they don't function with a continuous carrier and a good example of this is with a MT V an AM TV signal well typically the average power is 75% typically below the peak power because of the sync tips for the horizontal sync ERP however is effective radiated power which is the power you can actually throw into the radio horizon after the feed line loss and the antenna gain so you know I've seen some people actually the notable because it was a Las Vegas television station that did it they had a license for two million Watts ERP and they thought they were going to do it with a 10,000 watt transmitter and make everything up an antenna gain and I couldn't find a donut to explain this
but the higher antenna gain you use the narrower the beam width so if you use a very low and very low gain antenna imagine the pattern leaving it looking something like a donut but as you start to make that into like 10 or 20 DB gain that donut starts flattening out into a pancake now if you put a pancake on top of a mountain your power will fly over everyone down below the mountain and land someplace 120 miles away and that's just you know they're probably not trying to watch you but the poor guys they're 5 and 10 miles below under you are here's that chart I was telling you
about the UHF power restrictions for 47 CFR 2 . 106 footnote US 7 pretty much you'll see all of Arizona's covered most of Southern California actually most of California too and the Southern Nevada portion that Las Vegas resides in but basically these are outlines around US government Air Force installations and pretty much we share the UHF spectrum with you know 70 centimeter spectrum with the government and they use it for radar to look for space junk so they don't like one of our one of our repeaters starts getting to them and they get all excited thinking that you know this guy's repeater in his backyard is some space junk over by Mars
estimated ranges okay everyone it whenever I tell someone about how great amateur radio is they was like well what kind of range can I get well it a lot of it depends on the band and conditions but here's kind of a chart I put together and generally the lower the frequency the better range you can get because of path loss the higher the frequencies the more your radio waves actually get absorbed by buildings foliage some frequencies even get absorbed by the moisture in the air but 160 meters is the 1.8 the two megahertz portion and a lot of the people that are on this will run retired broadcast transmit AM broadcast transmitters but the reason I put bad range on that is because you're combating with a lot of noise on 160 meters everything that has a switch mode power supply will make garbage twisty lights both chargers yeah I can get intense 82 20 meters which is our HF range you know generally it works pretty good some bands work better at night other bands work better during the day there's a it's a little big put on this chart now 10 meters 10 meters I put on here has a peak and a dip because that really gets good in 11-year cycles excuse me that are concurrent with the sunspot activity that's going on and right now we were we're still kind of in the null because for whatever reason the Sun hasn't decided to erupt again so no one's really sure if that's a good thing or not but during the peak of the sunspot cycle I tell you a 5 watt handheld you can talk to Florida from Arizona and you know a Mobil rig will talk to Japan from my driveway VHF and uhf which are the bands that are in these handhelds here VHF penetrates a little bit better because the wavelength is longer UHF tends to get absorbed a little bit better and also this is dependent on your city and you know what you have skyscrapers and stuff now microwave microwave you generally have to use dishes for because like I said everything wants to absorb it so generally we use that for point operations like linking between mountaintops and yeah if you have the right size dish you can make a microwave signal go 150 miles if you have the right to mountaintops and that is because of the curvature of the earth we call that K factor but at 150 miles the dishes will actually be pointing into the horizon are you know about 5 degrees below the horizon to get at the other dish because you know they're curved kind of like that okay moving right along so at one point in time we did
have five classes of operator number one novice I could have sworn the last novice on the planet was Walter Cronkite KB to SG GSD he was a novice for about 25 years but lo and behold our radio Club just found one that wanted to upgrade so they are still out there same with advanced you most likely will run into people that are advanced simply because there isn't that much difference between advanced and extra and you can't get it advanced anymore so they're each kind of using that as a status symbol so
nowadays we have very simple three classes of operator technician general and extra oh and one more thing there's
no Morris code requirement anymore so it's very easy to test and get your license the requirement was dropped in 2007 the day after that was that happened was when I took went down studied for three hours the night before and took my general there were 34 people at that session and we were at a paint store and I actually had to stand at a shelf in the back of the paint store to take it and no one told me this but I had used blue pen and I circled the letters on the answer sheet this is one of our grading templates it was an almost an instant fail until the guy had moved it and was like oh you kind of did this wrong I'm like well you didn't you didn't tell me and you didn't give me a pencil but anyways so let's
take a look at what's in the technician package well you get all the privileges on six meters and up and you get some HF privileges they're very limited but hey we'll take what we can get you're limited to 200 watts pet power but you know the typical mobile radio does 100 watts so you're fine there CW only on 80 40 and 15 CW Rhydian did on 10 meters and you do get SSB voice upper sideband voice on 28 3 2 28.5 so there's a lot of activity that will happen on 28.4 cuz that's generally the one everyone congregates to so if you take general well you get all the technician for religious plus most of the hf privileges except for a couple of small slivers that are reserved specifically for advanced an extra and if you become a volunteer volunteer examiner you would get the ability to give technician tests and I was kind of scratching my head about that too you know you'd think you'd be allowed to give the general ones but for some reason they only give you a technician and if you get your
extra well you get all that plus all the other frequency privileges the ability to administer all b/e tests and you're entitled to a Class A or Class B callsign this is a Class A call sign
also most states offer special ham plates check your local listings for this some states they're free some spate states are discounted Arizona kind of sucks so you actually have to pay the same rate as a personal plate in Arizona but you know you get the little tower on the side and it looks so much cooler and another thing I always get asked this a lot people come up and they're like what part of Pennsylvania from well the
number that's in a all sign represents what geographic location it was issued and the reason why I have a three in my callsign is because it is almost impossible to find a 1 by 2 R a 2 by 1 and 7 land because a large number of them were reserved for Hawaii and Alaska and people when the vanity program came out started getting them because I thought they were lucky but anyways also American call signs only have one number in them so right away if you know someone you can tell someone's not legitimate such as the case of w6 JJ or just right away because they'll have in and when you ask them their call sign that you'll they'll have an improperly formatted one ok so who
here recognizes these basic electronic symbols ok but who of you know which one doesn't belong I passed my novice without studying when I was bored at a ham fest one time and I was 12 and I knew what you know a switch looked like on a schematic a resistor a capacitor so if you know anything about how to read a schematic for electronics you'll get along just fine but you know if you're
really interested on studying go to this store we are less than a mile from it it's south you can walk there if you can bear the Las Vegas summer heat or if you can find a taxi driver that'll you know only take you there for a mile go for it but go in there talk to a guy named Luke he's the store manager a very cool guy and he'll show you these books ok so
they are a little pricey but they are extremely well written and do a really good job going into theory plus when you have your license you can hand them down IES typically has 25 of each type and step in stock at any given time if you don't see a copy on the shelf just ask and they'll find it they also have the Gordon West study guides available there as well and you know I know what you're saying well mr. flux I don't want to spend too much money on this well if you're willing to use
defconn's network we have free online resources I will point out though that when taking the qrz practice at practice exams please remember to advance the test numbers because it'll put you on test number one by default and if you don't advance it such as a case of Kimberly ke7 pyl she was like oh look I'm getting a hundred percent I'm like really advance it to test two twenty because you know she kept learning the same 30 quote 35 questions over and over again this is the question pool size so
typically when you take your technician and general 26 26 right or better passing grade is 75% are 74 percent or better and I will point out that the general question pool has changed July 1st so make sure make sure you have the right right question pool that you're studying for so which class is right
forever you general general is right for everybody I recommend everyone become at least in general because you get privileges on all of the HF bands - that those small segments but that's fine you just can't talk to art Bell and pals on 3840 and the segment's reserved for advanced and extra which you know it's 400 kilohertz spaced over what was it 12 bands so it's not that much and it's
real cheap to take the test by us you know save a little coin on for the exam
this this was the first year we actually started testing here at Def Con and there were actually a few more of us but they had to go before this picture got taken let's see okay so things have
bring obviously 15 we'd like a photocopy of your driver's license a photocopy of your existing FCC license or you can print out the reference copy if you're going to upgrade to something like general are extra we'd also like to have your FRN which I believe is federal registration number but I'm not sure on my alphabet soup today if you don't have an F RN and you trust us we can use your SSN and calculators optional but it has to be an old-school one that you improve to us that it doesn't have the test memorized in it so you know a TI 36 would be just fine but don't show up with a TI 84 unless you improve to me that the memory is 100% clear on it okay so can you do it well you can ass kicked
by a blind man this is my club's president Bill kt7 m.i.a he is legally blind from when an accident happened aboard the USS Enterprise the engine on an f-14 Tomcat exploded in his face and this was the day he passed his extra and
here he is sun field day in a tent with blaring wind and we're giving volunteer examinations well and this one just
happened this is Karen Lee she doesn't have her call yet because she just passed on Tuesday she didn't have a lot here's the impressive thing she didn't have a laptop or a computer with the internet couldn't afford a book and didn't ask anyone to print out the questions for her so she studied on a droid yes wouldn't you know what smartphones are actually good for something after all and she actually took it the month previous but the website she was studying on I forget which one it was but their mobile version did not have the current question pool so she failed the first time but came back and took it on Tuesday and passed with only two okay so everyone's thinking okay show me
two hacks well we are on the verge of the second Golden Age of amateur radio the first one was the first commercial narrowbanding in 1963 and that's when we went from 15 kilohertz so you got a love unfunded government mandates so all the equipment that is made obsolete by mandates is worthless to everyone except hands so you know you can get like four and 500 handheld radios 20 bucks 10 bucks sometimes even free if you find the right guy so you know pretty much we're going from the ii narrowbanding that takes effect I believe it's February 2013 we're simple we're going from 5 kilohertz to 2.5 killed her deviation so you'd think that someone would just get in the radio and turn the pot down so it doesn't deviate as much but no the FCC says specifically that the radio has to be type accepted for that emission standard and no one wants to pay 15,000 to send the radio to the laboratory to prove that it's doing the emission they say it is so as a result you know commercial radios are being dumped on eBay and Pam fest like crazy right now so what do you need to work on radios
well I recommend you have at least one cat on your bench at all times because if you do your critter count goes down to practically nothing also the Messier your bench is the more work you can get done so what I have on my bench here and this is kind of an old pitcher to the left there I have a nastran vs 35 M which is variable voltage variable amperage power supply up to 35 amps very useful for working on almost any radio behind the cat there is my trusty HP 80 924 C that is actually as CDMA cellular test set but they built it on top of the 89 20 so it still retains all of the analog functionality of the 89 20 but the difference is that test set is 2,000 versus 12,000 for a used 89 20 so it weighs a ton but by golly it works great above that is a hewlett-packard I believe it's 1630 for logic analyzer I believe it's got 48 inputs but it might have a few more but anyways I picked that up for 50 bucks on eBay and it actually belonged to Connor peripherals so it even came with history also to the right of the cat is a fluke 87 I'll tell you to spend the money now and buy a decent voltmeter because these fly-by-night ones out of China I've actually had this happen within the last month because I don't like my good meter leaving the house but I get up on the mountain pull it out of my backpack and the thing promptly fries itself in my hand and what was impressive is I didn't even have it plugged into external voltage yet and also you're not seeing this to the right but I do have a Dell computer there so if I need to look up a data sheet on something I can just boom pull it right up okay
oh here's my Motorola Carta extraction tool used in insertion mode believe it
or not motorola actually gets like 45 for the right tool that does this and who would know that you'd have one sitting right below your feet here's one
of the hacks I did also the hacks I have done do appear on the DEF CON DVD in PDF form so if you need instructions on how to convert something that I've converted to amateur it's right there for you this is a GE VHF Master 3 and what is awesome about this is when I wrote the article on how to convert it they put it on repeater builder and it appears right below an article that somebody wrote saying you can't convert these to run in hand but it's a little this is the vast
majority of the work basically I just soldered brass brass acorn nuts aunt at the top of the tuning slope so I could get a little more metal and make the helical x' pull down to where I want them here's a board out of the uhf
government band very simple mod here take the whole thing apart and cut a quarter turn off each one of these helical x'
sometimes you have the other split though 452 4 1700 but if you want that extra 1 or 2 DB you got to take it apart and well this mods real cheap because it only cost 7 cents but while you're in there be sure to be
on the lookout for these damn things Oh tin whiskers the one on the right is actually a photo I took there about five days to are the one I took was about 5/8 to 3/4 of an inch long and it almost looks like a scratch it so fine but this thing is so fine I had to stop breathing while I was taking the picture because it was moving in the wind and I was like 2 feet from it yeah so what happens here is the wisp no one knows why they grow not even NASA but they'll grow and short out your stuff and then you'll be like well why ain't my stuff working and I actually saw this on a mountaintop the master to the drawer was folded open in the position of open position and someone wrote on it and sharpie do not close because as soon as you closed it the whiskers came down and shorted out your helical x' the one
of the most underutilized band in amateur radio right now is the 221 simply because there's only like one commercial manufacture art you know AM radio manufacturer that makes radios that run on it because apparently America is the only country that has a 220 amateur band so everyone avoids it like the plague like you know you'll find radios that have the functionality in them like the quad and the triple band er like the th f6a does 220 but so lately I've been a fire department graciously donated to our club about 50 of these things and we're like won't grade they're on VHF what are we going to do with them so I did some research and find out it was
possible to make the thing run on 220 and you know took a took me about three or four weeks worth of effort to do but because it's a forty five megahertz if' radio very simple I just convinced the voltage control oscillator to run backwards and I hacked the software to where it would program that far out of range so the transmit frequency you program true and the receive frequency you program 90 megahertz - where you actually want it well if you don't like
GE here's kind of the same thing I did in a Motorola max track this one's a little more involved because I had to take apart a bunch of the coils and I got tired of fighting with a PA so I just took the dremel and cut a slot out and shoved a that's actually a linear power brick in the center there that I stole out of a amplitude commander's single sideband 220 rig I knew it was wrong but I did it anyways and wouldn't
you know it the battery for this one ran dead sometime between Wednesday and Thursday but anyways I swear it works on 220 but this is the GE pcs handheld so if you see in the photo here I actually put brass screws and the receive tuning coils and I did a little work changing
coils on the power brick simply because the one that might work on 220 is almost impossible to find any work here's some
yeah I always ask people that's got any six meter duplexer 's I do I had to pick him up and have a friend Drive up and get him and they made a eight hundred mile trip and came down to me and you know they're they wouldn't really tune where I wanted them until I
pulled the thing apart and very simple cut one turn off that coil and solder it back together and stretch it out and
there's been a fierce debate over crystal old can crystal controlled rigs and you know which one's better the Mike or or the master - mmm I like the Mike
core because the receiver is hot but the master two transmitter is just so good all ooh - it's tough anyways the surplus market has a ton of these four hams that are you know just there then they were practically already worthless to commercial users but now they're really worthless but they are crystal controlled and no one likes to spend fifty dollars and wait two months for a set to grind if only there was a solution well now there is thanks to new
technology from our friends at analog devices we've created the virtual channel element my core Edition and I'll
tell you when you can solder in LFC SP 24 by hand you've reached max level ok so moving on
we have the general incompetence section okay we got this cable from a guy who got it from a guy who got it from another guy who that actually worked at the place that manufactured it but what you are seeing here is a homemade adapter from quarter-inch Healey axe to appeal to 59 connector made from 12 gauge copper wire also this is what
happens when you are in a site that you are not allowed to have mouse put our deke on at because somebody made the Hualapai Mexican vole and endangered species so the thing gets in your building and it likes to hang out on hotspots and crap all over your board and the problem is that stuff will eat right through the solder mask and start dissolving the copper so you know such as the case of this radio this radio jam didn't transmit mode and the guy was asking me okay find where the interference is coming from and I'm like your own stuff and sure enough he goes up there and the things transmitting this is really good this room was at a
juvenile detention facility they had a problem that every time lightning struck within a mile of the place the door controllers would blow up this room had the best indoor ground system I had ever seen with three eight-foot ground radials drilled through the foundation and double zero copper all throughout the baseboard this lone poly phaser here is our you know lightning arrester is the only thing connected to it all so I find it humorous because no antennas were connected to it at the time either but yeah they never even bothered to hook the antenna to it once they got the ground system and at first this antenna
looks at the top here looks like it's pointing at Las Vegas look again too
much stress on the tower when the antenna was a popsicle and the wind speed got high enough ripped the top rungs right off the tower because it wasn't bolted low enough all right I was
scratching my head on this next picture and I'm sorry it's a little hard to see but from this is the K triple a am tower old dark one in kingman for some reason someone bolted cellular antennas at the 40 foot level which it didn't make sense to me and I was scratching my head I even called their chief engineer and he didn't know so you know I didn't figure out why they did it until I went into the parking lot and
this is what I saw across the street apparently cellular coverage is so lousy in our town that they couldn't sell cellphones and this is a site access
gate and this is kind of a double-edged sword had it not been for the push bar on this front of this truck it probably wouldn't grab the gate but also had it not been there this guy would have
probably lost his junk and on that note
it has occurred to me that we have ran out of time and so I can clear the stage for the next guy I will be entertaining your questions in the Q&A room thank you for attending and enjoy yourselves the rest of the day