fazer

Re: OP-6 from scratch
« Reply #80 on: January 24, 2020, 04:47:34 PM »
Quote
I’m falling more and more in love with it’s delicious tone :)


I’ll start rounding up some parts.   I have some 0uncer 016 input with 50k output mic transformers and the 6j7’s.  Plenty of old cases so will need a choke and output trans .   Also have some Modutec VUs I don’t have any old ones.  These have to be 50 years old but nothing that goes back to the 30’s.


EmRR

Re: OP-6 from scratch
« Reply #81 on: January 24, 2020, 05:12:21 PM »

I’ll start rounding up some parts.   

I have original OP-6 inputs in the BM.

I can make the original gain control for anyone wanting that, including modified Daven's that will retrofit a bad original OP-6. 
Best,

Doug Williams
Electromagnetic Radiation Recorders

"I think this can be better. Some kind of control that's intuitive, not complicated like a single knob" - Crusty

"Back when everything sounde

DaveP

Re: OP-6 from scratch
« Reply #82 on: January 24, 2020, 05:18:00 PM »
Quote
I was thinking about using a 6SN7 as the triode with the second section as a CF to replace the 6J5.  It could be a Parallel connection also.  rp is the same as a 6j5 .  Thoughts.
That would work OK, just need a bit more heater current.

DaveP
Soundcloud: Delayed Action.


 

Related Topics

  Subject / Started by Replies Last post
17 Replies
3567 Views
Last post June 09, 2005, 01:21:46 PM
by ToobieSnack
36 Replies
9151 Views
Last post June 01, 2007, 07:06:00 AM
by Vikki
RCA BA-6A from scratch

Started by DaveP « 1 2 ... 8 9 » The Lab

176 Replies
42988 Views
Last post March 19, 2017, 05:29:08 PM
by DaveP
12 Replies
4997 Views
Last post June 24, 2012, 10:00:30 AM
by muffy1975