NFB arrangement on 69 ORST (50w)
Posted: Fri Sep 15, 2017 9:29 am
I apologise to those who've seen this on VAF.
I have been analysing and blueprinting one of these.
It is very similar to the matamp 2000 aluminium chassis amps I have seen (nice reference on Chambonino web site) except for ss rectifier and transformers.
I am puzzled as I see no negative feedback on this amp. Pics of similar amp on the Field Guide.
The GRO and OR100 amps are quite different.
v2a cathode has 1k2 bypassed with a 47uf electrolytic with a 180R to ground (i.e. Partial bypass). The boost is separate.
Anyone know what I am missing ?
I have been analysing and blueprinting one of these.
It is very similar to the matamp 2000 aluminium chassis amps I have seen (nice reference on Chambonino web site) except for ss rectifier and transformers.
I am puzzled as I see no negative feedback on this amp. Pics of similar amp on the Field Guide.
The GRO and OR100 amps are quite different.
v2a cathode has 1k2 bypassed with a 47uf electrolytic with a 180R to ground (i.e. Partial bypass). The boost is separate.
Anyone know what I am missing ?