High SWR's blew up your radio. Simple testing anyone can do to repair it.

To help support this channel donations can be made at. / mikesradiorepair or through PayPal at paypal.me/MikesRadioRepair

[@JackSoffalot]

Thanks Mike for all your videos and help! I installed new mosfets and ran into a problem on AM with the Lincoln II plus and just a few minutes before finishing your vid I found a blown Tip36 lol!! I was lucky with the ferrite as all I had to do was tack it back in place. Thanks again!!

[@spenceralfredo1980]

I guess im randomly asking but does any of you know a tool to log back into an instagram account? I was stupid forgot the login password. I love any help you can give me.

[@cadethomas142]

@Spencer Alfredo Instablaster :)

[@spenceralfredo1980]

@Cade Thomas I really appreciate your reply. I got to the site thru google and I'm in the hacking process now. Looks like it's gonna take quite some time so I will get back to you later when my account password hopefully is recovered.

[@cadethomas142]

@Spencer Alfredo You are welcome :D

[@markorrick7558]

Mike is absolutely the best Tech ! Old school sense and more importantly knowledge, and he is genuinely a cool guy. My unending problem is how in the world does a person, potential customer contact him ??? any help here would be monumental !! Thanks !

[@TheLonesometoad]

Forget it. He quit responding entirely. I was a frequent customer and he repaired several radios for me. Then he quit responding and no one has been able to contact him.

[@matthewholzinger1042]

My grandfather liked black walnuts. He used his workshop vice to open them.😅

[@km6hvu622]

I love your videos and greatful you take the time to explain what you do and why you do it. Cheers, 73's!

[@bobt659]

Thinks Mike for the great information. That first part was nuts ! No max mod for me. Thanks!

[@mikesradiorepair]

The price of repairing both radios was still less than half of what a new radio would cost.

[@Redsox3600]

Good to see you are still around on the platform, Mike.

[@ovidiuovidius]

Mike, how are you ? No radio repair? Please answer ! Fhanks!

[@mjb8658]

Thanks for these videos Mike, i have learned a lot. Going through them again, i think i missed a couple of them.

[@waynestewart1919]

Good crash course on radio electronics. I wish I had the attention span to learn electrical engineering. I would have a lot of old electronics that would be virtually immortal.

A 1 to 1 baulin in the coax can also prevent a lot of the SWR from getting back into the radio because it acts as a reflexive point that will bounce a large part of the reflected power from the antenna back to the antenna.. Is it a substitute for a good matched antenna? NO but it can help a marginal antenna from becoming a bad antenna.. There are lots of conditions that can detune an antenna like heavy rain, ice, fog etc. that are temporary but if you use your radio in those conditions often it is something to think about.. several wraps of coax thru a ferrite core can get you there..

[@Nikkymomo]

I have always known about the SWR since I started using the radio, however I never knew exactly what finals were. I definitely learned something here. Thanks

[@fernandoscrenci4874]

High swr on Lincolns or any radio with high watts Could be with cheap finals, 💥!! You are a good radio guy!!

[@andybibby342]

Why does everyone who know a little bit, like to dis a guy who makes a video for those that don’t know this? Be nice or be quiet and click on another video. Thank you for the video and the time you spent for some.

[@paulm0hpd319]

Maybe they think the info is incorrect

[@Michael-nf2yx]

I have noticed several videos on blown finals. Many of the videos involve the President Lincoln II. I recently acquired a Lincoln II. Guess what? I blew the finals out. I've been into radio's for 20+ years and never ruined a radio. My swr was 1:4 and I have current chokes in line at the radio, shack entrance and at the antenna. My Lincoln had the 1310n transistors. I shipped it off and I was advised to go with better transistors.

[@BowWowPewPewCQ]

After just watching a video claiming this can't happen it was refreshing to come back to reality. Great explanation.

[@hilldwler420]

Come back to you tube,Mike . I need some radio work done…

[@Centar1964]

SWR stands for Standing Wave Ratio...how do you get SWR's? People do the same thing with RPM...pet peeve of mine I guess...

[@danmackintosh6325]

bit like when people say 73's...

[@pegbars]

Because he's a CBer.

[@ComputerLearning0]

Christ almighty...

[@pokerdealer2003]

All about the reflection

[@ComputerLearning0]

@James Marquis Don't try pushing your bullshit on me.

[@rusty1187]

i remember getting "suspect " output transistors that had the numbers either blacked out with a felt pen, or sanded off! lots of magic smoke!

[@rabjr99]

I had the same issue with a stryker 655 a guy brought in the shop and he actually admitted his antenna was bad. When it went took out the finals and tip36.

[@justbeforethereturnofchris2393]

What are the best antennas for this type radio?

[@PeterDad60]

@@justbeforethereturnofchris2393 CB antenna!

[@justbeforethereturnofchris2393]

@@PeterDad60 .....yea I found one that works with this CB radio...

[@mikecook2714]

Were is mike ???, he is needed !!!!!

[@acestudioscouk-Ace-G0ACE]

Wise words as usual Mike!

[@JAWS1376]

Hey, I just bought a new antenna, but my radio is acting up. Can I borrow yours to check it out........

[@mikesradiorepair]

Sorry but I don't loan equipment, even to people I know.

[@JAWS1376]

@@mikesradiorepair haha sorry Mike. My humor's a little dry. Just trying to sum up the video in a couple words.

[@mikesradiorepair]

@@JAWS1376 LOL, it went right over my head. Now that I look at it again I get it. Sometimes things have a hard time penetrating my thick skull. :-)

[@JAWS1376]

@@mikesradiorepair np Mike! I know you're busy, I just want to say thanks for your detailed videos. From reading schematics to using test equipment, I've learned a lot just watching. One of these days I'll own the essential pieces of test equipment so I can maintain my collection of radios. (70's-90's) Just for alignments.

[@bertportillo246]

How I can ship a radio for some updates mod...Pls lets me know...Thanks

[@davep6977]

From as radio guy, just remember a SWR meter "measures" swr, it doesn't fix it. it's not a tuner (they sell tuner's separately)

[@bloguetronica]

Had that experience. Basically, I've burned the output stage of an RF PA that I've made, due to a badly tuned antenna. Funnily, the PA is only capable of outputting 1W at best, and I was not expecting it to be damaged.

[@jmcnallyua]

I have a K40 trunk lip Mount antenna hooked up to my Stryker 447 radio and my SWR on it on Channel 1 is 1.1 and on channel 20 is a 1.2 and on channel 40 is a 1.7 but for some reason I can't hear anybody on it for some reason and I live really close to the highway where there's tons of semi trucks rolling down it but I still can't hear anybody talking could that mean that my antenna has something wrong with it

[@ColtTSMG]

SOUL MAN, it sounds like you have the exact same issue that I have with my Stryker 955HP. Years ago I used it while driving tractor-trailer and had a few occasions where SWR peaked to the limit due to bad antenna connection. Not sure if that was the cause, but the last year I used it & ever since, I can't receive nearly anything on that radio even tho I'm in an area by the highway there should be plenty of CB activity. I just hooked it back up this week and it's still 'far too quiet'.

[@jmcnallyua]

@@ColtTSMG I figured out what was wrong with my Stryker Sr 447 my antenna is a trunk lip Mount K40 antenna and it wasn't grounded right but then I got it grounded right and it works great now I'm receiving and transmitting very good and they SWR is down to a 1.1 on all the channels and on Channel 40 it is 1.2 my SWR is now so I'm receiving good and transmitting but I'm still upgrading my antenna to a striker Sr A10 antenna I already ordered one but the u.s. Postal Service lost mining during shipping so now I'm waiting on the US Postal Service to replacement hopefully they are send me a new one other than that my radio is working out great now so you might want to check and make sure that your antenna is grounded cuz that could be your issue as well

[@Qmaster35]

I run a Francis 5.5ft whip on my truck and the SWR is 1.0 on my Lincoln II+

[@75ohmHAM]

I wish you'd come back

[@timidater4803]

please tell me you could still fix my radio!

[@lawrencelunceford1513]

Are you Excepting new customers

[@RC-Heli835]

Thanks Max Mike! You at least tried to teach some of us to work on our stuff! 😃

[@leonardk.3776]

You can wash your hands with raw lemon juice…then your good 👍

[@LeeKirkman88]

Higher swr causes the finals to heat up more they go into thermal overload.

[@junkman2758]

Thanks Mike for addressing the Maxima mod. There is a certain KZbin or self-proclaimed CB guru that preaches the radios gnocchi up without the max mod and I’ve always thought he was full of BS so I appreciate your addressing that with a commonsense approach.

[@goducks11111]

Good video ☺️

[@MrSIZEMIK]

Cos my field is in computers and being a semi-pro, i have some idea, , your wondering, what the hell is an SWR, SWR stands for "Standing Wave Ratio", the transmitting signal travels along the antenna (FORWARD) and refects at the end, returning down the antenna (REFECTED), the forward signal interferes with the reflected signal causing constructive or deconstructive interference, differant lengths create differant phases along the antenna, when a peek meets a peek there is max emission, and when a peek meets a trough there is zero emission, an SWR ratio of 1:1 is perfect constructive interference, where the cycle appears STATIONARY on the antenna, creating a perfect waxing and waning electo-magnetic field, as the electric field collapses, the magnetic field increases and vice versa, , ,Without that load absorbing energy, the energy instead appears as a high voltage or high current somewhere which may not be equipped to handle it, , So basically, an ideal 1:1 SWR will produce a low 50ohm resistance match where the antenna does work, the SWR is relatively constant along the feedline, the impedance will vary along the line unless it is perfectly terminated (that is, the SWR is 1.0 : 1). This is an important concept for impedance matching, because with a high SWR, the impedance at the final output transistor load inductor could be lower than 50 ohms, and produce a high current that damages the finals, , , PS - a 1:1.5 SWR = just a 4% loss \ a 1:2 = 11% loss \ and a 1:3 = 25% loss

[@mikebottiaux5850]

This is exactly what happened to my new Lincoln II+

[@bogger44fl]

On my Lincoln 2+ I moved my AM regulator to the back where the heat sink is. When it was on the side, it would get hot hast. I put a new Tip-36 on the back and it’s night and day difference. The regulator and the finals run nice and cool. That was about 2 years ago. No problem since.

[@douglasbollinger3626]

Mike, thank you for the videos, they're so helpful. Just curious, can you test the AM regulators and the drivers the same way you tested the finals? I'm trying to find out why a Cobra 25 LTD Classic won't transmit or receive. (I already checked the cb/pa switch and caps esr.) The sound chip makes noise when I put my finger on it. The signal meter isn't moving, but it's not "stuck", it moves freely - doesn't move when receiving signal is being broadcast. In the rear of the 25 there are two transistors. The one near L12 is the final, but what is the one in the very rear corner and what is the one by the volume/on/off switch? Thanks!!

[@cajuncoinhunter]

When you say does not transmit, you mean you have a dead key but no audio ?? The audio chip on the side of the chassis might be your issue. The 29 and the 25 radios DO require those 2 thick rubber washers between the mount bracket and the case of the radio.... If their not in there then when you tighten the 2 knobs they pull the case away from the PCB slightly and the solder joints fail.... Example no receive in the speaker and no audio going out....I have seen that a few thousand times....

[@douglasbollinger3626]

@@cajuncoinhunter Thank you for writing back. If you watch this video someone posted, this is exactly what happens with my Cobra 25 LTD...it's easier to watch his video than me trying to explain it, but everything that happens in his video is what happens with my 25 LTD...here's the link for you: kzbin.info/www/bejne/pKvUm3yBirB1qck

[@a2phil]

Can the method you used to check the final be used on older radios? I've got a Robyn SB 520D with weak (if any) tx output. I didn't see any other damage. Would it be a good idea to replace the AM regulator also?

[@Pull_It_Apart_Paul_Ham_CB]

Love your humour Mike. I drew inspiration from your method for how I publish my How-to- Fix videos.

[@bradcobel3071]

Question about the finals, I know that the 2sc1969's would need to be a matched pair, but do mosfets for example, irf520's need to be a matched pair? I'm still learning all this stuff, thanks.

[@christopherbell3768]

Yes they do.

[@JohnjrtChicago]

Sure miss you real banter and no BS chat Mike, hope you are well and enjoying life. Care sent.

[@markorrick7558]

Hey there. This may be a shot in the dark but, can you tell me the proper avenue to contact Mike?? No one , and I mean no one knows.😢 thanks. Mark.

[@TexHoss1]

In you professional opinion. I have an old Cobra 40 channel cb, LTD I think it was, that I used for 20 + years trucking. I spent over 35 years OTR & this was my 3rd radio. It has been boxed away for a dozen years or so. Are these worth going through, checking out & repairing if need be or is it better to buy something new. Just want to put it in my pickup just to have when I am on the road with my horses. Also I live on top of a mountain so I would like to see if it is like it was years ago where you hit the skip & could talk a long ways off. Just something to have some fun with. Also thought about hooking a linear to it. What's a good antenna these days? I always liked the K40's but didn't know if anything else is better. If I do what I am thinking of it will be mounted in a Dodge pickup. Thanks for your time.

[@CBRadioWayBack10-4]

High SWR 'blows' up your radio ??? really ?? so ALC system doesn't work in a radio ??

[@timd1833]

Any repair tips for fixing a STANDARD ECLIPSE GX1245S VHF Marine radio? Current draw is 600 mAmp. Display is blank but the illumination light is lit. Haven't been able to locate a schematic. Service manual is MMGX1240S (covers GX1240/1245 models ). Thank you for any info you may provide.

[@mikesradiorepair]

Sorry I do not have any service information on any marine or aircraft radios. You need a GROL license to service them which I do not have.

[@smoberdeen]

Your voice sounds familiar to someone who is on 2m in central Ohio. Is that you? I'll pay closer attention to the name tomorrow.

[@nugget8331]

It is. He's not doing radio work anymore from what I gather from forums

[@jordanhowell3870]

You know what your right

[@tomw5vlt119]

I love your videos. I learn a lot about radio from watching your content, thank you. Question - if the finals get blown so frequently, and pass on current for more internal damage... shouldn’t they build in a fuse?

[@aarhowell]

Read the support boards for the ubitx theres a nice protection mod using a P-FET like the IRF9540 as finals draw power from the 12volt input

[@bradmyers3327]

Do you still work on radios?

[@NsndoBrasil]

There is a project but to see the signal strength that the radio is receiving, for example, a weak but audible international station lights up 2 LEDs and one is coming in strong as if it were local, lights up 5 LEDs for a radio receiver. Do you know or have a project like this?

[@timmay2k]

My cb gets power but doesn’t transmit or receive. Guessin I blew out a resistor in it. Cobra 29ltd. 4 years old.

Pretty much all new amateur radios have transmit rollback circuits that prevent you from blowing up your finals

[@CrazyBossDK]

I had some serious damage done to my Anytone 5555N it have 3x 13n10 but the board looks the same as yours, the TIP36S was burning hot even when not transmitting, it just happend a morning i turned on the radio while i key the mike the display got dim and the radio basicly turned of untill you released the button. It even melted the fuseholder. I saw some one talk about those 13n10 are bad, and recommend to replace them with IRF520's - anything else to replace?

[@ChristiannTyler]

Which mosfets do you like to use for replacements? I see some TIP36C from galco but looking for the FQP13N10 mosfets and there are so many options.

[@chrissargent8398]

Does anyone know what happened to Mike?

[@joechar5275]

😢

[@williamsquires3070]

I’d check the drivers if the finals failed short (as these did); you’re essentially asking them to drive into a 0 ohm load (in this case, about .3 ohms) - they’re not going to last long that way! Even if the driver and final have a coupling capacitor, the driver is going to be seeing a vastly different impedance than it was designed for; SWR problem again. 🤔

[@rectify2003]

Mike, I think I have the High Gain 5 Schematic, that I need to find and send you a copy of.

[@larrybrown8983]

Great job as always Mike. Just curious if those finals were good what would the foward and reverse resistance be? Thank you for sharing your info on radio repair!

[@wmh327]

That's exactly what I was looking for in the comment section...what the reading would be had the finals not blown? Please let us know! Thanks again Mike for sharing your knowledge with us! Brian

[@ki4hou]

if theres a short in the finals can I put some current across that until its open and theyll be good again lol? Good video though. de ki4hou

[@ChrisJohnson-ci6gj]

For God's sake stop drifting off subject and talking endlessly never getting to the point of the conversation

[@SVerucci]

SWRs is plural...I have more than one radio therefore more than one SWR

[@ernestfogg9672]

Hi mike, I set up a 148gtl and my swr on the radio is high!. I put a mjf antenna tuner between the radio and the antenna. The meter on the tuner is down to 1.1 but still high on the radio. Should I disregard the reading on the radio?. Thanks in advance, Ernie.

[@sonnyjrcruz3022]

Very nice shared ideas that helps...!

[@michaelhall3568]

Thanks for the video Mike great info.

[@gotman4409]

How many times do you think you have ask people "did you check your SWR " ?

[@foxman362]

I'll trust MikesRadioRepair he's pretty good this guy is expert on radios just don't rush him.

[@darcyward8891]

I have a radioddity qb25 do I need to tune my antenna

[@EricLDC]

Would this cause it to melt? Not sure mine melted it was just an old Motorola cb burnt my hand too

[@juanfgonzalez2039]

Where's Mike ?

[@aol767]

I wrote moonrise sorry about putting suckered Hacker worm

[@marcusmotta2666]

Dear Mr Mikes ... My name is Marcus Motta and I live in the state of São Paulo Brazil. I own a CB Radio Cobra 148 GTL serial number 83018940 (by Taiwan) - an old model from 1980/90. I spent a long time without operating the radio and now when I turn it on, I realize that it doesn't receive any signal at all on channels ... only QRM (noise) ... Some indication of what could be happening ??? ... some diode or electrolytic capacitor???. ..lamentably I do not have the wiring diagram. thanks for your attention ... Motta, Marcus

[@kevinzimmerman557]

I have a RK5640a running a Wilson 2000 on a 18 ft Wilson cable running for a few years w/0 SWR all the sudden it started crackling when receiving transmissions but I was able to transmit fine two days ago it just stopped receiving and transmitting all together thought cheap radio lasted longer than I expected however now I've installed two brand new radios both same issue seems when I go to calibrate it starts working normally and then the needle shoots back and forth a few times and then down to nothing no response the rx/tx lights up antenna lights off and no responses from the R/RF,SWR,CAL settings I'm puzzled could it be a bad antenna/cable killing these radios?

[@mikesradiorepair]

Yes it could. You may have a intermittent short. If the coax cable is routed through a door jamb the cable may have become crushed. Depending on what type of antenna you have I have seen loading coils fill up with water.

[@superdavekc5vmq]

It’s SWR singular not plural it’s standing wave ratio

[@kasper6285]

I'm having issues... radio was just fine and tuned... I woke up n boom cobra lights changed double red screeching when I hit the mic and my dome lights flicker when I press the mic... it definitely possessed... nothing changed in set up or antenna.. fuse is fine it recieves good but omg the screeching like the mic is getting feedback from the speaker screeching...

[@kasper6285]

Cobra 29 classic Dome lights in truck

[@rickvantrease7726]

Mike questio for you. Does is stand true for any antenna whether vertical, random wire, etc. If Swr is 2.5 and you want 1.25 you shorten length?

[@mikesradiorepair]

Unknown, that's not enough information. The SWR curve usually looks like a spread out U or high SWR on either side of the resonant point. Measure the SWR on channel 1, 20 and 40 and take readings. Remember that as you go up in channels you are going up in frequency. Higher frequency means shorter wavelength and thereby a shorter antenna. Lower in frequency means longer wavelength and thereby a longer antenna. So if you have a lower SWR on channel 1 than on 40 shortening the antenna would shift the resonant point to the higher channel / frequency. If you have a lower SWR on channel 40 than on 1 lengthening the antenna would shift the resonant point to the lower channel / frequency.

[@W5NEH]

Mike, I have a dual band amateur radio I picked up second hand from another ham who said the UHF side of the radio no longer worked due to a shorted N to SO239 adapter. The radio still works fine on VHF and receives UHF fine. With an analog watt meter into a dummy load, I can see the needle just barely lift off 0 while in low power UHF, but if I key the radio on high power it blows the 15 amp inline fuse before I can see anything happen. Do you think replacing the Mitsubishi ra60h3847m1 PA module would potentially fix this radio or has more damage been done that I cannot properly diagnose or detect? I am having a hard time finding any information about testing PA modules and was hoping to find a way to test with a multi meter like you show in the video. RF in, Gate voltage and Drain voltage all short to ground with high resistance while RF out does not short at all and the meter reads OL. Is that a sign that the finals have fail and are no longer letting RF through the PA module? Any help or comments would be greatly appreciated.

[@W5NEH]

The radio is a Connect Systems CS800D and my testing had been done on analog FM

[@rodw3mpg644]

I am surprised at the number of CB users who think the SWR meter in the radio is used to "set" the standing wave. They actually think if they "set" the adjust the knob on the meter, it adjusts the SWR.

[@marty68wt248]

Always get one

[@tomstrum6259]

Good Advice.......Customer wanted "Fars" but only got "Swrs" !!! ......Whoever messes with Coax or Antenna better check Reflected Power.....

[@Cdswjp]

what exactly do u mean by "blew up your radio" ?

[@robert19694]

Mike can you tell me can you tell me if the a.m. regulator would have anything to do with me mod fading out on the FM frequency after about 20 seconds it goes right back signal stays good but the mods fades out on the FM band I am in the UK and the radio is a Stryker sr955.thinks

[@lesjones5684]

Will you please fix my 138xlr

[@joechar5275]

😢

[@joechar5275]

😢 I think he's now retired from repairs...so I'm told😢😢😢😢

[@lesjones5684]

Ahh 😢

[@riman34]

Mike, are you still doing cb repairs? Can I send mine in for service? Matt

[@IFIXCASTLES]

My antenna must have gone south and when I keyed up my Telsat 140 I lost receive and transmit. What should I look for ? Finals blown??

[@IvesMarcelin]

Good work ..👍thank you for the video .../// my mike is burn ..the cause false connection 🥺on my president jackson ..40 chanel...inf/sup etc but my square microphone don't answer ..i got to repair it...i slowly learn...

[@lesjones5684]

I like smoke 😅😅😅

[@9PAT508]

Hello there, Yesterday we had a snow storm and i heard a (tik tik) poping sound coming from my coax . I was not transmitting with the radio. this morning i turn the radio on it receive ok but when i puch the PTT, no modulation indicator an all mods. what could be the source of that poping sound and could my radio be fixed. any idea ? Same radio President Lincoln II thanks

[@mikesradiorepair]

That doesn't sound good. Lightning storms, snow storms and sand storms can all cause ESD damage. Every snow flake that hits a antenna can deposit a small static charge and that charge builds up. Eventually the potential gets large enough it can arc over and unfortunately it sounds like it arced over inside your radio. It's hard to take a guess as to what got damaged. You would need to trace out the PTT switching circuit.

[@9PAT508]

@@mikesradiorepair ok mmmm too bad your so far away (lol) Thanks for your reply and I love your videos . have a gr8 day 73s

[@wonderingtimesllc7203]

I am searching for HELP! I recently purchased a 10,11,12 meter President Lincoln II + I can not get SWRs lowered no matter what I do?????

[@user-gc2kh7so3c]

A message the Freightliner Cascadia is is impossible to get swrs much under two hope I don't smoke my little 29

[@OlderThanDirt-ii3rp]

They used to make an SWR meter with a built in Pi-L network (transmatch) you could install to regulate SWR. I use one to go from 10 meter to 11 meter on the same antenna.

[@harrisoncorey282]

hi, i have an ic-735 that was my grandfather's. I've been playing around with it for a while now and I've been having high SWR issues. I'm slightly worried that it blew up at some point before I got it, or maybe i destroyed it without knowing. Is there any definitive way to tell that I screwed it? I just recently got my license and set up an 80-meter dipole and I've been having issues getting contacts.

[@udx-483muddbucket5]

Great info. ✌✌

[@ricdonato4328]

Amazing information. My question is how much did the repair for those radios cost? Would such a repair be close to the price a new radio? Thank you.

[@shep6123]

I’m having problems with my SWR high it goes to three no matter which way I put it on channel 1- through 40 still stays the same three I can’t get it down I checked the coax coax is fine the ground it’s fine but how can you tell if the antenna I have a trucker 2000 I’m thinking he’s got some kind of a gram problems on the van I have it on the van back of the van

[@Colemanrc]

Your video is very interesting... I have a damaged Anytone At 6666 radio... how would I send it to you. I am in Caracas Venezuela... I am a radio amateur and I need help... could you repair it... please

[@mikesradiorepair]

I could but I'm in the USA and shipping would ridicousley expensive.

[@Colemanrc]

Tomorrow I will ask about the shipping cost. Which part of USA? In my country there is NO ONE capable of repairing my radio.

[@jeremyshiver6055]

I got a general Lee with bad finals

[@rusty1187]

I did radio years ago.... Please note that you can tune your antenna on a specific channel. If you set it on channel 40, channel one will probably be higher. The best spectrum spread is to tune on channel 19 or 20. this is why truckers run channel 19.

[@CBRadioWayBack10-4]

what shit are you talking about ?? so why don't truckers run on 20 if that's your logic.. in fact if you take in to account the 'alpha channels truckers would use channel 22 or 23 as center of the CB spectrum 26.965 to 27.405 is channel 22.5 or 27.230Mhz. run on channel 19....ass..

[@patrickbuick5459]

They ran 19 back when it was only 23 channels. 11 was a calling frequency, and of course, 9 was for emergencies.

[@jordanhowell3870]

That's probably why 9 was for emergencies because it was a mid spectrum channel when they were 23 channel

[@robertmanning5212]

Compare the lowest channel, 1, against the highest, either 23 or 40. Adjust the antenna(s) accordingly. Adjust dual antennas at the same time, not individually.

[@robertmanning5212]

ALWAYS TUNE YOUR ANTENNA BEFORE PUTTING A RADIO IN SERVICE. Never trust the internal SWR circuitry. It lies, it lies and it lies. Use a good external SWR meter. One that has not been dropped and broken the solder connection inside of the box. 25 - $55.

[@roberttinsley551]

Please give me a call thank you.

[@mattm5941]

Is a 1.5 swr on highpower on an anytone 6666 bad?

[@mikesradiorepair]

It's not horrible if that's what your asking. With a SWR of 1.5 you are transmitting 96% of your power and 4% is being reflected back to the radio. Start to get worried when you get near 2.0 to 1 SWR. With a SWR of 2 you are transmitting 88.9% of your power and 11.1% is being reflected back to the radio. At those levels and above you start to risk damaging the output section of the radio.

[@mattm5941]

MikesRadioRepair my swr usually is at 1.5 dead key at like 50 watts and then jumps up to around like 1.6ish when modulated is that bad 😬 and thx for the reply

[@francismcclaughry3794]

I had a lighting strike one of the antennas that I had up. I had my ham radio unhooked. but I had a free play radio and a am drake which both got hit by the lighting. magic smoke came out of the drake. still got it around here some where. after it killed those two radios. it by passed the big screen i had bought was fine but it went on past and fried the misses computer. go figure.

[@rectify2003]

Very useful Tips. I wish you lived in the Uk, I have a High Gain 5 I really need tuned and setup. It works, and had the channel Mods done on it.

[@ianjones5792]

Hi poss may be able to help with sorting your Hygain 5 radio

[@ianjones5792]

Can e mail me on [e-mail]

[@portercoogan4862]

So there should be no continuity between center pin and outer in back of radio?😜I think some majic smoke escaped

[@ronalddaub9740]

Come on Johnson tester from 71 does not have the same switches and I'm trying to set a 23 channel radio