[ARC5] Starting work on BC-453B

[Jim Mandaville]

Greetings to the group from a new listserve subscriber.  Hoping someone
can give me some advice on the following questions:

I'm starting work on a recently acquired, non-modified, BC-453B.  The
receiver works, although the set regenerates and oscillates at some
settings of the gain control and antenna tuning cap. (I assume it's the
RF stage that is oscillating.  Changing tubes had no effect).  I'm using
B+ of 253 v. (measured under full receiver load that runs 47 mA).

Questions:

1.  What is likely to be causing the oscillation? (I'm suspecting bad
bypass caps) or voltages too high on the R.F. stage).

2.  Is 47 mA about the right current draw, or does this indicate leaky
caps?

3.  What caps should I check as most likely to be leaky (I'm assuming
the ones that handle plate or screen voltages or those in the input
filter.

Thanks and regards,

Jim Mandaville, KF7A, Tucson, AZ