There are 2 optical chopper wheels inside, one stationary and the other on the shaft. The FT757GX used the same one. I had one that came out of a 757GXII that the shaft seized but some oil freed it up. Of course I took it apart to see what was inside :-) It sure looks like shaft wear over the aproximate 32 years took its toll. The LEDS was a good move Peter. I had a 757GX that I was inside of for many years :-) Very nice that you found a suitable replacement for the 767GX. I still have the FP-757HD power supply, a very nice one I might ad that has a slow on unlike the Astrons, maybe .25 seconds from 0 to full voltage. I use it to run my Ic706mk2g now.
Nice, Peter! I have a 767 on my own, i love that beast, it is still in nice condition, including the 2m module. Yes, it is old. but i personally think it is worth keeping it. Best 73!
Great repair Peter. The original encoder looks like it had plenty of use over the years. Good to see there is replacement parts for this still out there. Thanks for sharing. 73
I think rotary encoders may fail more often than we think...I had to replace the encoder on my TenTec RX-340 receiver not too many years after I got it; fortunately TT was still in business at that time and the new one was relatively inexpensive....almost wish I'd bought two as a "just in case"! TNX for sharing Peter. 73 - Dino KL0S
You are right Dino we have to replace all kind of encoders very often especially the early versions. I'm curious how the modern versions will turn out...Thanks for watching 73
Nice to see you back, and giving us another fine video from the TRX Bench. Peter please tell me you put some heat shrink on the leads of that encoder. It's great to see these good old girls get a tune-up not a throw out. And looking back at all the work it must of took to assemble this radio as compared to today rigs is incredible. Anyway's Anywho's Anyhow look forward to your next. Cheers 73
Nice work Peter, thanks. It seems like they would have provided a connector for the encoder so you wouldn't have to solder the wires directly to the pins.
there was a mod concerning the freq not holding. the batteries were wearing out too quickly so they added a shottkey diode in the cct. of course, the back up switch may have been switched off (next to the switch you squirted) in the first place. I have replaced my battery several times so now have extended it into one of my vacant module bays to make the replacement easier as taking this radio apart is a real nause!
Great video. What Bourne part number did you use? I want to make sure I get the same length shaft, but I Would prefer a little slower pulse rate per revolution. Not sure if 100 would work well but 256 looks touchy in the video to me.
Great job as always, question, was the original encoder not repairable? It seem to be a mechanical failure like a worn shaft bushing as oppose to an electrical failure. Just curious, again nice job and thanks for sharing.
Sorry I know I asked this before but you didn't reply. I'd really like to know about the encoder shaft? Was the new one long enough or did you have to modify it? I've seen people swap the encoder before but they needed to extend the shaft making the job a bit of a pain in the butt. So was the one you bought as long as the original or did you do something to make the VFO knob stay on? I'm really interested to know... Thanks, Great Video as always.
I get myself in trouble - by taking apart the bad parts ;) I would wonder if the encoder problem was a worn bushing giving an erratic readings - worn wiper - if it used a wiper , or optical window ? Having done a lot of machining , would think about replacing bushing - but that would add to cost - getting myself in trouble again . Also wether the fit to mount was a matching ? Thanks again for the great videos , John
Nice video, I have the same problem and I need to replace the encoder as well. I need your help in one aspect, below in the comments you mention that an adapter is needed for the rotative shaft , because the ENS1J-B28-L00256L is shorter than the original. Could you tell me which adapter did you use? Thanks !
Hello - Thanks for the great video. I am going to repair my FT-767 encoder now. I noticed that the shaft on the Yaesu encoder is much longer than the replacement encoder. Did you have to extend the shaft?
Great job. I had to do those mods to a 767gx several months ago but I altered some resistors on the encoder and that fixed it. How did you overcome the shorter shaft on the New encoder. If I thought a aftermarket encoders shaft was going to fit I would have opted for changing the encoder instead.
The issue with this encoders is that even when you think you have fixed it it will come back for warranty..The best is to swap it out...Thanks for watching 73
I'd like to repair a TS-757 GX with the same fault. Does the 757 have the same VFO encoder? Can you tell me the difference between your replacement encoder (ENS1J-B28-L00256L) and the cheaper ENA1J-B28-L00100L? 73, DL7AO
Hi Peter, thank you for another nice repair. I have an old Yaesu like this too, and i am happy to know if i ever need to replace the encoder i can follow your instructions. One little question, when you replaced the old bulbs with new LEDs, did you need to use some resistors, and if yes - do you remember the ohm of those? 73 LB5JG Asle
Hi Peter, the encoder you used (and I bought) is not only too short for the knob, the size of the shaft ís also too big and does not fit in the main knob! This was not mentioned in your video. For this reason the repair is much more complicated than you made us believe. Not amused, greetings, Chris
