1081 (ten81) suggestions...

GroupDIY Audio Forum

Help Support GroupDIY Audio Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

mrdarwin

Well-known member
Joined
Apr 24, 2013
Messages
191
Location
France
Hi!
Finished 1st of 4 1081 clone units. (ten81 pcbs)
Everything seems to work fine.
Followed Neve ground schem, and any hum present  :). Anyway, unit is more noisy when eq is engaged:  "...Output noise better than - 80dBm at all line input levels." Biased a la Igor, 250/280mV at a 10ohm resistor bewtween B+ and pin6 of BA340.
Will post some pics.

Here is the problem. When I power or shut down the unit, from a 24vpsu (psu vintage design 6/24/48v) mounted outside, there is a big audio peak, as big as it peaks my orion 32 (more than 20dBu input level)... Can it damages my sound card? How can  I avoid it?

I'm ready for helping other builders if it necessary!
thx

 
here are some pics, more to come...

1081-1.jpg


1081-2.jpg


any builer's tip for my problem?

I posted a thread in black market. Looking for spare plugin amp pcbs, or someone who can build for me. Got the typons. Something like 2 BA308, 2 BA340 and 4 BA338, at a nice price!
Anyone has a typon of BA640 Neve?
 

Latest posts

Back
Top