RCA BA-6A Limiting Amplifier Restoration
The
following photos show the restoration of two of these amplifiers; Serial #3
and Serial #1621.
As received both were very dirty, both poorly repainted, and both with numerous
modifications
and incorrect components. However both are complete!
#3
as received. This is the best chassis (least rust) of the two. Transformers
are
correct but electrolytic cans are no longer "plug-in" type.
Bottom
of #3; mods are evident (red circles)
Close
up of #3. Although this is the best chassis there is still rust as seen here
on the
6SK7 sockets. Note also that the rubber grommets have deteriorated.
#3
with the power transformer removed. Recall this is the best chassis but plenty
of
rust is still evident. This corner will have to be touched up.
#1621
showing chassis rust. This is hard to repair without repainting the chassis.
Bottom
of #1621; mods are evident (red circles)
Top
of #1621 showing incorrect power supply choke.
#3 label
#1621 label
The
shelves for #3 and #1621; both need refinishing.
#3 complete
#3
complete
Completed photos of #2 (it's actually the
same color as the above photo)
