Ron Wagner <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Ishii,
I see others tell you to parallel a cap across C163 for a test. I see
using a scope etc too. If you are like me, somewhat test equipment poor,
you can use a 10uf or so capacitor rated for 200 volts in parallel with a
DVM (or analog volt meter) on the AC scale. That will basically give you
the AC ripple voltage on your DC line. High ripple suggest bad capator or
heavy over loading.
I choose a voltage rating for my DVM capacitro that is higher then the
voltage DC that I am measuring. Also observe polarity.
You do not say what the problem is that the RX has. I assume bad audio
hum, etc. Don't do as I have, measured the regulated side of the +B and
thought it was the problem when it was not. Then again that was a T4XB
and I do not think the R4B or R4C has any 0A2 tube regulator on the +B.
Let us know what you find.
Good luck,
Ron
On Sat, 24 Dec 2005 [EMAIL PROTECTED] wrote:
[EMAIL PROTECTED] made an utterance to the drakelist gang
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Hello
My R4C has developed a problem.
The +B voltage that should be originally +150V is only +130V.
The capacity of the electrolytic capacitor C163 decreases??
May I have any suggestions about this cause?
73 de JA2JVC Ishii
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