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Nikko Beta 50 - missing capacitor - can anyone help

T

Trebolo

Member
Hello , I was hoping someone here may have access to a nikko beta 50 preamplifier. I have not been able to find a schematic anywhere for this unit. And the previous owner had removed some parts to replace and never finished the project.
I need to know which capacitors c806 and c817 were. They were aluminum electro's . Any help would be amazing. Either a copy of the schematic or just simply the part numbers

Thank You
 
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From eyeballing it, can you get an idea of where in the circuit they are - power supply, amplifier stage, phono amp, tone board? Do they go to ground, across other components, or between active devices or stages? Are there "mirror" caps on the other channel that would give a clue? What's the lead spacing, big or small?

Depending on what you see, you could try a few different values, adequately rated, and very carefully look, listen, and feel for any problems. Larger sized non-power supply caps may be for local filtering, and I'd start at 220uf and maybe work up and down from there. Smaller sized caps, I might start at 47uf and work up and down. Electrolytics have 20% tolerances. I'd fire it up on a dim bulb tester.

This is what I might be comfortable with on my personal equipment if I was desperate and had no other information. Others may say this is a bad idea, and they will chime in. If you aren't comfortable with this approach, don't do it.
 
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