Blue Velvet Preamp OA2 wiring

bernard hyman · 4322

0 Members and 1 Guest are viewing this topic.

Offline bernard hyman

  • Newbie
  • *
    • Posts: 1
on: February 22, 2011, 05:14:14 AM
In looking at the schematic and then building the Blue Velvet Preamp according to schematic - newbielink:http://www.blackdahlia.com/html/tip_44.html [nonactive] - I am not sure how to read the wiring of 2,4,& 7.  I did what I thought was correct and it is not right as get no voltage drop across the pair of tubes.  Could someone please provide specific instructions on how to wire these tubes to each other and then to ground?

Still love my Foreplay III, just looking for something to compare

Bernie



Offline Grainger49

  • Hero Member
  • *****
    • Posts: 7175
Reply #1 on: February 22, 2011, 05:39:11 AM
Bernie,

I count 5 tubes and there are a lot of things labeled 2, 4 & 7.  Which are you having trouble with?



Offline debk

  • Sr. Member
  • ****
    • Posts: 658
Reply #2 on: April 03, 2011, 04:13:38 AM
Don't know if you ever found a solution to this.  There is a thread about it on the Audiokarma forum

http://www.audiokarma.org/forums/showthread.php?t=156701


Deb

Debra K

Eros 2Phono amp
BeePre2, Psvane ACME 300b
Kaiju, Linlai Elite  300b
Monamour 2a3 amps various tubes
Sota Sapphire, Pete Riggle Woody Tonearm, Kiseki Purpleheart Cartridge
Rega P6 Ania Pro cartridge
Roon Nucleus
MHDT Labs Orchid DAC
Jager speakers