Rising 20/20 ebay for $99

[Superduper]

:judge: :judge: olice: fftopic: :spam:
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ok - who knows the clairtone model number for the 20/20 ??

There are at least seven variants of the Rising family:

The classic "20/20" style:

Rising SRC-2015
Continental GA-3000 (Black Dust Caps)
Nippon (model no. ??)
International (model no. ??)

The following have the black, square grills:

Rising SRC-2005
Yorx K 3681
Clairtone 7978

JUST CHECKED. THESE OBSCURE MODELS AND MANUFACTURERS DON'T BELIEVE IN SERVICE MANUALS. NOPE. NADA. PURE UNOBTAINIUM.

 

[MasterBlaster84]

JUST CHECKED. THESE OBSCURE MODELS AND MANUFACTURERS DON'T BELIEVE IN SERVICE MANUALS. NOPE. NADA. PURE UNOBTAINIUM.

Yep we're on our own with these, how good are you at guessing because that's what your going to have to do when you work on the 20/20's.

 

[Fatdog]

If you had a working 20/20 and all the right tools of the trade, you could probably meter the working box and then tune the non-working based on readings. I had thought about trying that with my 20/20 that has a messed up tuner. I decided to skip it and just keep it as a parts box.

 

[MasterBlaster84]

If you had a working 20/20 and all the right tools of the trade, you could probably meter the working box and then tune the non-working based on readings. I had thought about trying that with my 20/20 that has a messed up tuner. I decided to skip it and just keep it as a parts box.

Bobby this is where having a good second box would help tremendously.

 

[jaetee]

Tape deck is more important to me than the tuner... but I'm not in "acquisition mode" right now or I'd snap that one up in a heartbeat. Good price for a nice looking classic boomer.

I'm surprised nobody bought it. Boomer market is really down right now, isn't it???

 

[Superduper]

If you had a working 20/20 and all the right tools of the trade, you could probably meter the working box and then tune the non-working based on readings. I had thought about trying that with my 20/20 that has a messed up tuner. I decided to skip it and just keep it as a parts box.

I wish it was that simple but it's not. Even if you could meter the tuner and know where the hookups are (the scope has to be hooked up to particular places to capture and view the requisite waveform), you'd still have to know which one of the 15 or 20 variable capacitors, RF tuning coils, or RF transformers to adjust. Problem is, you could adjust the wrong one which will have an effect but then you'll throw another setting way off. Where you hook up the oscilloscope is not always intuitive either, meaning there might not be a junction. Rather, it's not uncommon to specifiy the hookup to a certain leg of a capacitor or resistor. Also, the manual does specify the type/frequency/modulation and modulation level to inject at certain places of the tuner to obtain a particular result. Each tuner is different and while you can take a guess if you have a different model of the same manufacturer (or even country, such as japan), somehow, most of the boxes that don't seem to believe in service manuals -- most seem to be from China and maybe they just copy, maybe they do things differently. Who knows.