Rob Flinn
Well-known member
Hello folks,
I acquired a few of these RCA made in the UK Tape recorder amps. The one I have been testing so far with my bench PSU seems to function OK, but has limited F resp due to the eq curve which is handled by 2 feedback loops.
I'm planning to try subbing in some Gardners 1:4 for the input transformer, so the Z isn't quite so low.
Looking at the first loop round V1 could I just remove it altogether since any recommended resistors in the filter network are pretty big values, or should I try a 1M there.
The second filter loopp from the tertiary winding on the o/p transformerlooks like it needs to be there. Do you think just bypassing the caps & connecting R17 straight to V2 pin 8 would work
I acquired a few of these RCA made in the UK Tape recorder amps. The one I have been testing so far with my bench PSU seems to function OK, but has limited F resp due to the eq curve which is handled by 2 feedback loops.
I'm planning to try subbing in some Gardners 1:4 for the input transformer, so the Z isn't quite so low.
Looking at the first loop round V1 could I just remove it altogether since any recommended resistors in the filter network are pretty big values, or should I try a 1M there.
The second filter loopp from the tertiary winding on the o/p transformerlooks like it needs to be there. Do you think just bypassing the caps & connecting R17 straight to V2 pin 8 would work