No high voltage readings

Airvernel · 1921

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Offline Airvernel

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on: May 14, 2015, 04:40:36 AM
Hi,

finished S.E.X. 2.1 without any upgrades (yet) and all resistances and all but the high voltages read correctly. All the terminals with high voltages though (marked in the pictures) read -0.3V DC. Any idea what's causing this? Tube filaments glow nicely.

Thanks in advance!

Max
« Last Edit: May 14, 2015, 04:44:38 AM by Airvernel »

Maximilian Kollock

Offline Paul Birkeland

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Reply #1 on: May 14, 2015, 04:49:08 AM
What AC voltage do you have between power transformer terminals 6 and 7? 

-PB

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Airvernel

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Reply #2 on: May 14, 2015, 04:55:45 AM
Your reply made me notice that the tiny connection of terminal 7 to the power transformer is split (AC voltage between 6 and 7 close to 0)... so could i just solder this back together?
« Last Edit: May 14, 2015, 04:58:07 AM by Airvernel »

Maximilian Kollock

Offline Paul Birkeland

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Reply #3 on: May 14, 2015, 05:00:34 AM
Yes, that would likely be the culprit.

-PB

(Also, in your second picture posted, be sure the 150K resistor and 1.27K resistor don't have leads touching)

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline Airvernel

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Reply #4 on: May 14, 2015, 05:02:10 AM
Alright, will try that and report back. The resistors are actually about a cm apart from each other, it's just the point of view :)

Maximilian Kollock

Offline Airvernel

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Reply #5 on: May 14, 2015, 05:22:06 AM
Perfect readings now - thanks for the spot on help!

Great sound... for the right channel. None for the left :P

Nothing to do with the tubes - switching them does no change.

Update: all good. One of the 90° cinch adapters seems to be broken. sex up and running  8)

Not the slightest hint of hum or crackling btw. just perfectly dead background and clear sound.
« Last Edit: May 14, 2015, 05:35:36 AM by Airvernel »

Maximilian Kollock

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