Integration - need help with voltage [resolved]

[Kris]

Hi,

I finally installed Integration upgrade and all voltages after shunt regulator were on the spot.
After C4S install though, I got 106VDC on terminal 2 (should be 65-90VDC). Other voltages on terminal 18, 26 and 31 are perfect. Also, two LEDs on A side of C4S board close to A socket don't lit.
Please help.


Thank you,
Kris

[Paul Birkeland]

If you swap the tubes, does that high voltage move to the other side of your Reduction?

[Kris]

Yes, it does. Thank you Paul. I guess I shouldn't be using this tube anymore.
Off to ebay then.

Many thanks again,
Kris

[Paul Birkeland]

If the tube is super new, it can help to let it run for a few days to cook in.

We have found especially with Russian tubes, even brand new out of the box ones, that the plate voltage in a circuit like the Reduction or even the Crack will start out pretty high and not settle to proper levels until roughly 50-100 hours of use.

[Kris]

I had this tube in my lightly used stock reduction for about two years, so I guess it's just going bed.