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Author Topic: Integration - need help with voltage [resolved]  (Read 478 times)

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Offline Kris

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Integration - need help with voltage [resolved]
« on: September 07, 2021, 05:30:34 AM »
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
« Last Edit: September 09, 2021, 12:47:20 AM by Kris »
Audio PC with JPlay FEMTO
Rega P1 with Carbon cartridge
Reduction + Integration
BeePre + BeeQuiet
The Fix
Paramount v1.1 (300B)
Frugel Horns MK3 with Alpair7.3eN drivers

Submissive --> Crack+Speedball --> HD650

Offline Paul Birkeland

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Re: Integration - need help with voltage
« Reply #1 on: September 07, 2021, 05:46:13 AM »
If you swap the tubes, does that high voltage move to the other side of your Reduction?
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Kris

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Re: Integration - need help with voltage
« Reply #2 on: September 07, 2021, 06:13:06 AM »
Yes, it does. Thank you Paul. I guess I shouldn't be using this tube anymore.
Off to ebay then.

Many thanks again,
Kris
Audio PC with JPlay FEMTO
Rega P1 with Carbon cartridge
Reduction + Integration
BeePre + BeeQuiet
The Fix
Paramount v1.1 (300B)
Frugel Horns MK3 with Alpair7.3eN drivers

Submissive --> Crack+Speedball --> HD650

Offline Paul Birkeland

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Re: Integration - need help with voltage
« Reply #3 on: September 07, 2021, 06:20:53 AM »
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.
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Kris

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Re: Integration - need help with voltage
« Reply #4 on: September 07, 2021, 06:28:54 AM »
I had this tube in my lightly used stock reduction for about two years, so I guess it's just going bed.
Audio PC with JPlay FEMTO
Rega P1 with Carbon cartridge
Reduction + Integration
BeePre + BeeQuiet
The Fix
Paramount v1.1 (300B)
Frugel Horns MK3 with Alpair7.3eN drivers

Submissive --> Crack+Speedball --> HD650