One way to clean those fine grooves on the knobs is to use a toothbrush. I use a medium or hard-bristled brush and cut of half of the length of the brushes that way I get a stiff brush that is able to clean the tiny grooves without damaging them. A little bit of soapy water and they should be fine.
Wow, that cleaned up real nice! You do awesome work, very impressed! Have you thought about poking around with a signal tracer to see if you can find at which point the signal pulsates? Also as someone who geeks out over test gear...would you consider doing a shop tour? Looks like you have some nice vintage stuff....can never get enough ya know! :) ~Jack, VEG
Yeah I’m definitely going to do some more work and I’ll put it out for information. I’m doing some more studying on the audio side and I’ve got some ideas. Thanks for the comment.
24:10 this kind of sounds like "Motorboating", but on the other hand not like I'v heard it before. en.wikipedia.org/wiki/Motorboating_(electronics) Have you verified that the PSU do deliver enough power to the amplifier stage? Scope it and measure it with a multimeter while it pulsate and distorts.
I suspect the tuner sections will need alignment since this unit suffered water damage. At this point I’m not ruling misalignment out at least as far as the radio section. Stereo reception doesn’t work at all so the MPX will need attention too. My focus for now will be getting the audio chain working then I’ll delve into the radio side of things. I’ve never heard motor boating either but it’s something to consider. I do need to take some more dynamic readings to see how it’s actually operating. Thanks for the comment.
Nice receptor, looks like an interesting protect. Only wish you get a fixed stand for your camera! Is hard to watch so much shaking...
One way to clean those fine grooves on the knobs is to use a toothbrush.
I use a medium or hard-bristled brush and cut of half of the length of the brushes
that way I get a stiff brush that is able to clean the tiny grooves without damaging them.
A little bit of soapy water and they should be fine.
Wow, that cleaned up real nice! You do awesome work, very impressed! Have you thought about poking around with a signal tracer to see if you can find at which point the signal pulsates? Also as someone who geeks out over test gear...would you consider doing a shop tour? Looks like you have some nice vintage stuff....can never get enough ya know! :) ~Jack, VEG
Yeah I’m definitely going to do some more work and I’ll put it out for information. I’m doing some more studying on the audio side and I’ve got some ideas. Thanks for the comment.
@@FreeElectron Will be looking forward to part 3...you deserve my subs, keep working at it! ~Jack, VEG
24:10 this kind of sounds like "Motorboating", but on the other hand not like I'v heard it before.
en.wikipedia.org/wiki/Motorboating_(electronics)
Have you verified that the PSU do deliver enough power to the amplifier stage? Scope it and measure it with a multimeter while it pulsate and distorts.
I suspect the tuner sections will need alignment since this unit suffered water damage. At this point I’m not ruling misalignment out at least as far as the radio section. Stereo reception doesn’t work at all so the MPX will need attention too. My focus for now will be getting the audio chain working then I’ll delve into the radio side of things. I’ve never heard motor boating either but it’s something to consider. I do need to take some more dynamic readings to see how it’s actually operating. Thanks for the comment.