Excellent work Peter. I like a radio that is not covered in surface-mount components. There is something to look at and admire in a radio like that. These days it is like grains of rice scattered over the board! A big processor, a few chips, display drivers, well, you know what I mean. Nice work, repairing the radio. Clever, using a bulb as a fuse to protect the front end. As always, I find your videos very entertaining and educational. 👍 😎 I like your work, very thorough and precise, a joy to watch a professional at work :-))
Hallo Peter, wie immer eine professionelle und nachhaltige Reparatur. Ich schaue immer gerne über deine Schulter und kann sehr gut beurteilen wieviel Arbeit in den Videos steckt. Vielen Dank! 73, DG3JA
Dear Peter, nice too see you back here on our playground! Nice fix once again, one oft the best sold TRX worldwide saved..73 de Olaf. Ich freu mich, Peter. 73 de Olaf
Thanks, Another great repair video Peter. Love the little "oops" at around 24 min in, "do you know where to put these back in?". Excellent reminder for all of us to take pictures or video!
Hi Peter, it's great to see another video. Looks like that customer was very lucky but definitely a lot of work to just switch a bulb for sure lol Thank you for sharing always look forward to your videos. 73
Excellent video showing the trouble, this time was very easy, the same work I make on 757GXII but less tilt up the PCB, but changing the minilamp ( 8 volt - 0,1 Amp ) directly from the top of PCB. Very often I found this trouble in Yaesu radio due to excessive RF or static voltages on antenna System. 73’s Silvano I1WSM
I still have one of these from when I was first licenced unfortunately not working unless I can find a scrap one not that I need it but a shame really glad to see someone with skill and equipment still repairing these old radios
Hallo Peter, wieder was von Dir gelernt. Alte Geräte haben immer noch ihren Wert! Danke für die super Erklärung in allen Deinen Reparaturvideos. 73 de Stefan DG4RBS
Hi Peter, during these day I repaired a Yaesu FT-767GX and I have seen on RF board the same lamp !!! I think it was very used in the past. Thanks for your video my friend and stay safe. 73s Pasquale IW0HEX
Thank you Peter.. I have a very similar FT-757 II and wondered how well the bulb protected the Rx circuitry.. Knew it would open on a major spike, but was unaware of it progressively increasing resistance / protection as it heats up above normal current / signal levels.. Cool! Good job Yaesu! And thank you for the explanation.. Forgive me for a couple comments.. - although it might not be considered good practice, if you had clipped the leads off the old bulb, and soldered the new bulb to the old leads, you might have avoided heating the PC board & having to flip it.. just a thought.. - looking closely at the underside of the PC board, about 21:51, it seems there might be at least two other cracked solder joints on through holes & one end of a surface mount that might have benefitted from a reheat while you were there.. Thanks again.. Dennis
No problems with comments...Yes clipping might avoid open solder joints but you never know. I always check those jobs to be sure all is fine... at 21:51 must be a reflection...
If I may offer a suggestion, whenever I have to take wire harnesses apart, I label them with a piece of masking tape, even if you're just using numbers, it helps!! On reassembly, just reverse order!
That pin being loose makes you wonder if this radio ever had any intermittent problems. It's actually a good thing the fuse blew so the pin could be fixed...K5AZE
these vintage radios are 100 times better made than today's radios. they were made when designers thought about the users. Transmit into the radio with 100 watts? Lightning strikes the antenna? no problem, the user has to change a bulb worth 80 cents. Back on the air in one hour, maximum. The new generation of transceivers? they go faulty just by the position of the Sun and the planets, or if a bigger bird sits on the antenna. Of course, they can be fixed by changing a bunch of SMD semiconductors and passives, or by swapping out the whole board. The cost? well... let's not talk about the cost.
Peter have missed your videos have you been keeping well that little lamp could it not substituted by a Zener diode were over power could to ground nice little old radio and you have given it more life again well done :)
Fantastic video Peter & thanks for sharing. Awesome troubleshooting approach. For us hams who can't afford such a good radio test set I would love in a future video if you could explore alternative, cheaper options. I'm always learning something useful in each video you post. Huge apologies, I accidentally hit the dislike in a rush but all good now. God bless you always Peter!. Bis bald & tschuss
Hallo Peter, direkt hinter der Anschlußbuchse "RX Ant" ist eine Schutzdiode D1 (Suppressor oder Transzorb?) parallel zum Eingang. Ist die nicht zerstört?
Hallo Stefan, du meinst bestimmt die D116 der Transidient Suppressor. Dieses Bauteil ist noch nicht gefährdet wenn ca. 15 Watt direkt in das Gerät gelangen. Bei 15 Watt haben wir ca. 27 Volt und da passiert noch nicht wirklich was mit Bauteilen die eine viel höhere Spannung "abfangen" sollen....
I'm probably seeing it wrong, but the blue electrolytic capacitor right next to the bulb looks to have a hole in the side. Visible in the video at around 17:25.
@@TRXLab I understand you perfectly well. You on the other hand might struggle with my accent from Doric part of North East Scotland :-) Your English is better than my English 😎
Ah I just saw another response where you believe it's a reflection.. I thought about that, wasn't sure. Do you think it was a reflection from that resistor or cap right beside it?
hello from australia I am fixing this bulb with my radio :) thankyou for the information. My donor radio bulb looks very good but is 8 ohms I was expecting closer to 0 do you think 8 ohms is good? I would like to buy a new bulb however i cannot find 6-8v 100mah locally
I have a FT-757GXII myself. Biggest job so far was to remove the seized rotary encoder for dismantling and lubrication. Removing the encoder required disconnecting all those cables from the boards, before finally separating the front panel from the chassis. So I know the pain! While the covers were off, I also took the opportunity to perform one of Peter's modifications, using a PTC thermistor to temperature stabilise the master oscillator ua-cam.com/video/KxVJfxiw4ZQ/v-deo.html Such stability is probably overkill for HF SSB, but the temperature drift became problematic when using FT8.
Danke für das tolle Video.Ich habe die gleiche Station,nur 10m,28MHz funktionirt nicht,alles andere in Ordnung.Was denken Sie,warum 10m(28MHz) nicht funktionirt .ES ist eine meine erste(1989 Lizenz)wertvollen Stationen.😊😊😊.73,de Jozef OE1CJG,(S56CJG).
Peter you are the perfectionist every time and a real pleasure to see your work
Thank you
That repair on the over voltage 7100 was brilliant... 73 De Peter M0JFK.
Excellent work Peter. I like a radio that is not covered in surface-mount components. There is something to look at and admire in a radio like that. These days it is like grains of rice scattered over the board! A big processor, a few chips, display drivers, well, you know what I mean. Nice work, repairing the radio. Clever, using a bulb as a fuse to protect the front end. As always, I find your videos very entertaining and educational. 👍 😎 I like your work, very thorough and precise, a joy to watch a professional at work :-))
Thanks for feed back
Hallo Peter, wie immer eine professionelle und nachhaltige Reparatur. Ich schaue immer gerne über deine Schulter und kann sehr gut beurteilen wieviel Arbeit in den Videos steckt. Vielen Dank! 73, DG3JA
Vielen Dank Jörg! Freue mich das dir meine Videos gefallen und es ist gut einen wirklich sachkundigen Fachmann hier zu haben! Alles Gut 73
That little bulb did its job!!! Saved the more expensive parts from disaster. Of course, it was a pain in the butt to replace, but it was worth it.
So it is :-)
Dear Peter, nice too see you back here on our playground! Nice fix once again, one oft the best sold TRX worldwide saved..73 de Olaf. Ich freu mich, Peter. 73 de Olaf
Thank you Olaf. Yes we love our playground :-) Take care.
Thanks, Another great repair video Peter. Love the little "oops" at around 24 min in, "do you know where to put these back in?". Excellent reminder for all of us to take pictures or video!
LOL yes if you forget it you are really lost..
Loving the cheerful start to your video's. Have a great weekend. De M5AXA
Thank you
Nice quick repair.
Buddy from The Radio Shop has run across that issue before.
Thanks for taking the time to produce the video.
Jetzt hab ich was zu tun, diese neue video von Peter anzuschauen !
Danke dir !
Hoffe es hat dir gefallen :-)
@@TRXLab hundertprozentig, Marke Peter garantiert dafur ! ;-)
Hi Peter, it's great to see another video. Looks like that customer was very lucky but definitely a lot of work to just switch a bulb for sure lol
Thank you for sharing always look forward to your videos.
73
Thanks for feed back
Lift up the board? I will literally burn down that radio :) Thank you Peter. As a new ham operator i learn a lot from you.
Thanks glad that you liked it..
Nice to see you back Peter, thanks!
Hi Peter, a pleasure seeing a new video from you. An excelent job as always. Thx for sharing with us a bit of knowledge )
Thank you
A very informative video, thank you! I had to learn that lesson on taking pictures before pulling connectors the hard way.
Thanks for another fine video to go with my morning coffee !!!
glad that you liked it
Excellent video showing the trouble, this time was very easy, the same work I make on 757GXII but less tilt up the PCB, but changing the minilamp ( 8 volt - 0,1 Amp ) directly from the top of PCB.
Very often I found this trouble in Yaesu radio due to excessive RF or static voltages on antenna System.
73’s Silvano I1WSM
Great advice about taking a photo or two BEFORE removing the connectors on all those wire harnesses!
Great repair Peter. Wish I had some like you near me for repairs.
Thank you
I still have one of these from when I was first licenced unfortunately not working unless I can find a scrap one not that I need it but a shame really glad to see someone with skill and equipment still repairing these old radios
yes it is a nice oldie
It’s a pleasure to watch 👍👍👍
Thank you
So glad to see you again!! I was afraid you had quit again. please keep the good videos coming!
Glad that you liked my videos..
Another very informative video from you peter, thanks for posting
Thanks for watching
Peter you're back!! Missed your videos.
Hallo Peter,
wieder was von Dir gelernt.
Alte Geräte haben immer noch ihren Wert!
Danke für die super Erklärung in allen Deinen Reparaturvideos.
73 de Stefan DG4RBS
"Mostly used in FM" 🤣 maybe 27.xxx MHz😉
The user group for this radio has changed from HAM to CB operators.
Thanks for the nice video.
73 de Bernd
sometimes yes :-)
Another great video Peter, Had the same problem on a FT-101 and the bulb was on the rear of the radio. Very easy to change. Thanks for the info.
Glad you liked it
Thanks Peter, nice work as always
Thank you Michael.
Been wondering where you went. Glad you are ok. Great video. Thanks Peter.
No worries I'm always here :-)
Hi Peter, during these day I repaired a Yaesu FT-767GX and I have seen on RF board the same lamp !!! I think it was very used in the past. Thanks for your video my friend and stay safe. 73s Pasquale IW0HEX
Yes it was always used in those old rigs.. Thanks for stepping by and all the best and stay safe my friend 73
Enjoyed the repair. Thank you for sharing. ⚡
Thank you
Thanks Peter! Great work!
Thank you
Great video Peter !! Well done !
Thanks
Good work Peter
great work,lots of work for bulb replacement
Thank you Dennis!
Thanks for the video. Sure hope the next one is right away. Look everyday.
Saturdays only
Thanks for watching
Very nice lesson to be learned
Glad that you liked it
Thank you Peter..
I have a very similar FT-757 II and wondered how well the bulb protected the Rx circuitry..
Knew it would open on a major spike, but was unaware of it progressively increasing resistance / protection as it heats up above normal current / signal levels.. Cool! Good job Yaesu! And thank you for the explanation..
Forgive me for a couple comments..
- although it might not be considered good practice, if you had clipped the leads off the old bulb, and soldered the new bulb to the old leads, you might have avoided heating the PC board & having to flip it.. just a thought..
- looking closely at the underside of the PC board, about 21:51, it seems there might be at least two other cracked solder joints on through holes & one end of a surface mount that might have benefitted from a reheat while you were there..
Thanks again.. Dennis
No problems with comments...Yes clipping might avoid open solder joints but you never know. I always check those jobs to be sure all is fine...
at 21:51 must be a reflection...
Good job and nice video.
Thank you
If I may offer a suggestion, whenever I have to take wire harnesses apart, I label them with a piece of masking tape, even if you're just using numbers, it helps!! On reassembly, just reverse order!
That pin being loose makes you wonder if this radio ever had any intermittent problems. It's actually a good thing the fuse blew so the pin could be fixed...K5AZE
yes that is true...
Nice job peter
Thanks
these vintage radios are 100 times better made than today's radios. they were made when designers thought about the users. Transmit into the radio with 100 watts? Lightning strikes the antenna? no problem, the user has to change a bulb worth 80 cents. Back on the air in one hour, maximum.
The new generation of transceivers? they go faulty just by the position of the Sun and the planets, or if a bigger bird sits on the antenna. Of course, they can be fixed by changing a bunch of SMD semiconductors and passives, or by swapping out the whole board. The cost? well... let's not talk about the cost.
perfect
hi peter have a nice day greetz from holland
Have a nice day too!!
Peter have missed your videos have you been keeping well that little lamp could it not substituted by a Zener diode were over power could to ground nice little old radio and you have given it more life again well done :)
Thank you John!
There is a TVS transorb diode already in the circuit. You can see it in the schematic diagram, Peter's pointer is pointing exactly at it at 8:08
Fantastic video Peter & thanks for sharing.
Awesome troubleshooting approach.
For us hams who can't afford such a good radio test set I would love in a future video if you could explore alternative, cheaper options.
I'm always learning something useful in each video you post.
Huge apologies, I accidentally hit the dislike in a rush but all good now.
God bless you always Peter!. Bis bald & tschuss
Yes you are right I should show how to do nearly the same with cheaper devices. Hope I find some time...
You can change it to the thumbs up button, but the thumbs down button works just as well for UA-cam :-))
Hallo Peter, direkt hinter der Anschlußbuchse "RX Ant" ist eine Schutzdiode D1 (Suppressor oder Transzorb?) parallel zum Eingang. Ist die nicht zerstört?
Hallo Stefan, du meinst bestimmt die D116 der Transidient Suppressor. Dieses Bauteil ist noch nicht gefährdet wenn ca. 15 Watt direkt in das Gerät gelangen. Bei 15 Watt haben wir ca. 27 Volt und da passiert noch nicht wirklich was mit Bauteilen die eine viel höhere Spannung "abfangen" sollen....
@@TRXLab Hallo Peter, OK, Danke! Wusste nicht, dass das "nur" 15W waren.
D1 = D116 - tja meine Augen ... hi.
I'm probably seeing it wrong, but the blue electrolytic capacitor right next to the bulb looks to have a hole in the side. Visible in the video at around 17:25.
👍👍👍🙋♂
Hi Peter did you spot the other fractured solder joint diagnoly right and down by the othre small chip cap .
Yes I have seen it while I was editing the vice but I'm sure that was a refection....
@@TRXLab hope so i have seen many like that i hate solder like that i will go over a complete board if i find 2 or more bad joints .
Easy fix, except for gaining access to the solder side of the board. -118dBm for 10 dB SINAD on 40m? Pretty darn good.
Peter what are those bent row of jumper wires for? At 12:19 there are 7 of them
To my knowledge those jumpers are often used to be able to connect test equipment...
@@TRXLab That's what I thought Peter, but you never know with radio's. *Cheers* *73*
Got an 747GX in working order, this plastic box.
still a good radio...
@@TRXLab It works good and not seen the golden screwdriver. Good audio on it, thanks for reply Peter, have nice day.
Are such replacement bulbs readily available today?
you need to search for it
great video peter, just wondering? Where did you learn such good English?
Oh thank you normally I get criticised for my bad English
@@TRXLab I understand you perfectly well. You on the other hand might struggle with my accent from Doric part of North East Scotland :-)
Your English is better than my English 😎
@time frame 21:47 it appears there's another cold solder joint on the right hand side of the frame, left of the surface mount resistor/capacitor.
Ah I just saw another response where you believe it's a reflection.. I thought about that, wasn't sure. Do you think it was a reflection from that resistor or cap right beside it?
hello from australia I am fixing this bulb with my radio :) thankyou for the information. My donor radio bulb looks very good but is 8 ohms I was expecting closer to 0 do you think 8 ohms is good? I would like to buy a new bulb however i cannot find 6-8v 100mah locally
Use white diffuse LED's, 3600 Kelvin types instead
@@TRXLabare you sure? this is for the Rx protection fuse bulb
@@mattaitchey4917 Sorry, me bad off course not the LED for the front end protection...
I was just thinking, if that bulb is such a PITA to replace, is it also pure unobtanium?
What is PITA and what is unobtanium?
Pain in the ass. Unobtainable.
is that SMD I just saw in this old radio?
No that is THC
Hello. my 40? year old 757 that is stuck in transmit, any ideas? Only power is connected, no mike. Eugene, WA6JZN
If ya dont hear, switch the radio on...if you still dont hear...switch ya ears on...
I have a FT-757GXII myself. Biggest job so far was to remove the seized rotary encoder for dismantling and lubrication. Removing the encoder required disconnecting all those cables from the boards, before finally separating the front panel from the chassis. So I know the pain!
While the covers were off, I also took the opportunity to perform one of Peter's modifications, using a PTC thermistor to temperature stabilise the master oscillator ua-cam.com/video/KxVJfxiw4ZQ/v-deo.html Such stability is probably overkill for HF SSB, but the temperature drift became problematic when using FT8.
Thanks for feed back
Thank you Peter! Volodymyr UR5NET
Danke für das tolle Video.Ich habe die gleiche Station,nur 10m,28MHz funktionirt nicht,alles andere in Ordnung.Was denken Sie,warum 10m(28MHz) nicht funktionirt .ES ist eine meine erste(1989 Lizenz)wertvollen Stationen.😊😊😊.73,de Jozef OE1CJG,(S56CJG).
Hallo Jozef, aus der Ferne nicht einfach zu sagen, aber wenn nur 1 Band nicht funktioniert, könnte es etwas in den Filterbänken sein.