Thank you. This is exactly what mine is doing. I talked for a while on 10m no problem but drop to 40-80 and it would stop transmit. Power on 40-80 was 145w!!! 10m only 35w. I'll pull the RF Filter Board and go thru it. Very informative video thanks.

This repair was a real headache, congratulations for spotting out the problem. I always enjoy watching your videos, your lab equipment is just fantastic (and expensive to built as well!). Thank you,73.

Well done. Intermittent faults are always the hardest to find. 73’s

Another great learning experience for me Wow I have one and glad to see a video on it. Thanks Peter Love to watching you do magic

You are a very generous repairman. Most commercial radio repair companies would have returned the radio to the customer upon seeing signs of corrosion. The reason being (as you know), it could take hours (lots of money) and you still may not solve the problem.:) I enjoy your videos.

LP100A-I had this same meter, very nice one I might add. A “W” indicates peak mode, a “w” indicates average mode and a “T” indicates tune mode. For viewers reference.

Hi Peter, fantastic video as always and great detective work. Nice job!

Thank you TRX Bench, another top video, allways the best.

Another nice repair video. Look forward to your next project.

Another great video peter. I suspect that the increased power output also accelerated the wear/damage to the relays. Keep the videos coming, very entertaining as always. Karl..

Great work thank you for video your a pro always look foward for you repairs \have a great day Peter

Great Repair Peter. Thanks for your videos.

Good to see you again my friend. Excellent video as always.

Another great repair. Thanks Peter.

great work peter i always look forward to your videos

Good troubleshooting skills! Top notch!

I've had my share of 706's in for repair and oh boy the worst ones have always been either polarity reverse hook ups or lightning surges.

amazing video i enjoyed your investigation my friend, 73 de EP7AHN

ah my friend after 10 years at icom i can tell why that happen and when i asked the customer if the used the radio for out band TX with high power the answer was all ways "no not me" i hated doing the filter relays, i don't know why but i did.

Well done Sir!

Excellent video, tnx for sharing... Bud...

Sehr lehrreich.

The Force of next early Day.

Hello im a amateur from sydney Aust,i wish we had more techs like yourself here in oz great work ,if any of my gear mucks up id love to send it to you instead of japan iv a ft950 with dmu,ic7000,ft897d and a few more great work PETER. NigelWright vk2pha Sydney.

Thanks for this. This is a great radio and video. I've had some very intermittent receive problems with mine on vhf ssb. It looks like 14 relays on that board, give or take a couple. 160 watts is pushing this REALLY hard! It don't understand why people try to get every last watt of power out of a radio, particularly a small radio like this one. If anything, I'd rather cut mine back for 100 percent duty cycle, which is way more valuable than maybe one more bar on the receiving end's meter. I wonder if you can rebuild that board? On a side note, I LOVE the vfd display in the power meter! I wish someone could think to make a new production radio with a vfd display in it. 73's- Ryan

Nice work, thanks for sharing!

Peter Another great video.

A friend has a 706MKIIG that lost all output on only HF. When he presses the PTT light the RED TX light doesn't come on with HF. Works with VHF/UHF. Any tips? How the RED light gets its power might be a clue to why no HF output in all modes. VHF/UHF are working fine.

Do have the pin out for the power plug. Positive and negative power line. Thanks

This radio is rated at just 100 waþs

Another Great Video !! 73s KC3BGT

Ich hätte da auch eine Frage bezüglich dem Power Problem. habe auch einen 706 MK2 G von einem OM bekommen, die Sendeleistung in FM bricht teilweise urplötzlich zusammen, in SSB jedoch ist sie dann vorhanden . Das nächste was mir aufgefallen ist dass bei 5W output mit Modulation die Leistung um bis zu 2W einbricht, bei 100W sind es dann 10W weniger mit Modulation. Sehe ich mir die HF am Oszi in dem Fall dann an sieht es fast aus als wenn ich AM moduliere wo bei ich in FM sende. Alles sehr komisch denn er reagiert auch weder auf Kälte noch auf Hitze das kommt irgend wann schlagartig und kommt dann irgend wann wieder mit der Leistung. Ich habe auch das Filterboard in Verdacht jedoch das mit der komisch aussehenden HF bei einem Modulationshub von max. 2,4Khz in FM verstehe ich nicht . Lasse ich die HF zur PA weg und messe direkt auf dem PLL Board ohne Endstufe sehe ich am Oszi in den Spitzen der HF auch ganz minimale Verzerrungen mit Modulation . Wenn ich eine Mailadresse von dir hätte könnte ich dir mal Bilder davon schicken wie das am oszi aussieht. Was auch noch aufgefallen ist , man sieht am Spektrum bei eingestellten 28Mhz komischerweise bei genau 30Mhz noch einen netten Spike stehen der aber schon zu sehen ist bevor der Sender kommt, der bleibt auch stehen wenn ich auf 22Mhz und weiter runter gehe, bei 3,8 Mhz werden es sogar 2 Spikes neben an mit gutem Pegel ! Hattest Du schon einmal so ein Problem beim Icom ? ich hoffe dass er über Nacht morgen wieder seinen Fehler zeigt um weiter messen zu können.

My 706 when in CW mode on all freq starts emitting beeping signal that I can not stop unless I unplug the keyer. I have tried several different keys. Can you help

Hi Peter. This is Thyagu VU2PTR from VU land. I saw your you tube repair of Icom IC 706 which was quite informative and nice presetation. I have a IC 706 MK2G which is refusing to get switched ON ? I checked the glass fuse F591on the PA pcb. It is ok. I checked voltage at the relay RL591on both sides of the contact. Voltage at the down stream side of relay contact going to L613 is not appearing when the power ON switch in pressed condition.When I checked the resistance across the relay coil with digital volt meter shows 460 ohms even when the meter probes are reversed. Will it be a relay contact failure ? As I have very limited test equipment resources request you to help me to proceed further to fix the problem.Thanks.

found this being a common problem on old vhf Sailor ships radio's, contacts being bad on the relays.. replace the relays and its fine again.

Great job at troubleshooting that one Peter. At times fault finding can be difficult but glad to see you nailed it. Next is are you going to rebuild that filter board so when the next one comes along?

Nice shack!

Very good information---My Icom 706 filter board has packed up as well and can not get a replacement here in South Africa--It is the pre MK2 so only the 706 :( Any info of where I can order a filter board for the Icom please? ZS1SSM

almost seemed like the fan was acting a bit erratic at about 32:00 or so. Nice job on the repair, thanks for posting these videos. Do you think you have to repair so many icoms because they are popular or because they aren't designed very well?

How close is this to the original 706? Mine will fade out on power while transmitting.

That's another great video Peter, thanks. Is the old filter board worth refurbishing?

Another great video. Where did you get the new board? Was it new or used and was checked out?

Muito bom, amigo, eu gostaria de saber como entrar em modo de serviço, em meu ic-706mkii, pois o manual fala em " enter meter set mode: turn power off, terminate the [remote] jack with a 3.5mm mini -plug. while pushing [p.amp/att] and [tune/call], turn on. minha duvida devo fechar curto neste p2 conector? obrigado! pois tenho somente 30w em hf, e 5w em vhf

Thanks for the video. Love watching your troubleshooting. I don't understand how corroded relays would have allowed you to have the 130 to 150 watt output that you had early in the video. I certainly follow the low output but the higher than normal output has me puzzled Thanks Kevin

Peter - nice troubleshooting effort! Were there in fact two issues here - one the output power level being intermittent as a result of LPF relay failure AND the other a matter of alignment? With the LPF failing why would the output power be increasing? One would think it would only decrease below its spec if the filter is "downstream" from the PA. Just curious. 73 - Dino KL0S

Hi Peter, will the old filter board be refurbished to use again? or will it be scrapped? Interesting fault but why was output power so high was it the golden screwdriver or was it part of the fault cheers Sean

How open tx 2m band icom 706 not mk2g thanks

i bought Japanese version IC-706MK2 S as my first radio..unfortunately i didnt knew tht Japanese version is limited to 10watt for HF..I search high & low for power transmit mod..Method 1 desoldered diodes and adjust LR379..Method 2 desoldered 4 diodes and adjust ALC(correct?)...have u tried any of this mod?

Hi , really good job thank you , i have same problem with radio , the question is how can get new filter board pl's ?

Nice work, I have repaired four 706 LP boards and all four were from owners who used the radio only on 11m, coincidence?

Very informative. I have a display problem with my Icom 706. The display gets dark after a while. Do you have any videos pertaining to this problem. 9Z4KH. Operator Kenrick hutchinson from Trinidad, W.I.

I have a 706 with problem with relays but unfortunately dont have a spare board i gess have to replace all the relays.

Thank you much for this video. I am right now having output power issues with my 706mkiig. Hopefully I can find someone who can identify the problem and repair it.

Hello Peter. Where did you order all the parts for the ic 7000? Thanks

I wanted so badly to probe components for a bad solder joint which is what I would have done here. I've found many bad joints this way. Is there a particular reason why you did not do this?

Wenn wirklich das RX/TX relaise defekt ist, hättest dann nicht ne SWR des todes??? Da zerreißts doch die Endstufe oder?

Love the video love your tech support do you have a call sign ? looking forward to watch more of your video's Do you have a video on repairing a icom 706mkIIg where no audio when speaking into the microphone but radio transmit fine just can't be heard please reply if you have any information on repairing this problem thanks ted Dean KD2ARD USA hope to hear from you soon, 73s

nice and informative video. i am looking for ribbon cables for my 706mkiig. can you point me in the right direcrion please... thanks

Sorry nicht PLL Board ich meinte das mainboard !

Hello...my ICOM IC 706mkIIg has a Problem with the reception. Sometimes it' s Like Fading (Signal goes down), when i press the PTT...reception for 10 Seconds normal...Thema come Fading Back. Can you Help ne with this Problem? Vy73 Stefan DL7SHK

Why dont you repair led tv?