Aleph J Schematic

[schultzsch]

hope there it`s nothing that bad...on the preamp side
thanks for your help

[buzzforb]

Turn on and see if voltage at output slowly goes away. If so, I think ramp up is issue, as I don't see another way to have same results.

[schultzsch]

yes after the peak it goes away

[buzzforb]

Lets see if ZM chimes in. It could be overshoot from your PSU as another option.

[Zen Mod]

bloody bleeding resistor on output

is missing , of course

and yeah - short circ between two headphones

next time use 220Vac from wall instead of amp , to prepare speakers for listening session

[buzzforb]

I did assume the bleeder was present, as it is in the schematic.

[Zen Mod]

maybe yes . maybe not

whatever - powering tube pre in same time or after power amp is ......... just not worshiping as it needs to be ..........

either culprit is in SS HV or elsewhere

who cares ?

either put delayed mute relay on pre output , or use da unshorted circuit between two headphones

[buzzforb]

And I thought I had it working for a second.

[schultzsch]

I have bleeding resistors on output of 100K.
Could there be any problem for the input jfets of the aleph if on the input arrives 20Vdc and the amp is shut down?
in the future I thought to redesign the preamp and I think mute relays will be an option

[Zen Mod]

that's not DC , but surge AC voltage

it happens in moment of gas tubes firing

see datasheets

so - I repeat - either muting relay on pre out , or power up power amp about 1min later

don't make big issue of it - normal behavior