On 27 Aug 2025 at 18:56, Mark K3MSB wrote:
> I have a BC-221 whose ID plate says BC-221E. It is not an E
> variant.
> From the tubes, front panel controls, and TM11-300, I think it's the
> AK variant.
I have two -AKs here: unfortunately. in storage, not in the shack. :-(
> Looking at the front panel, what is supposed to be behind the two
> antenna connectors?
Well, only ONE is an antenna connector: the "other" one is a ground connector...or should
be.
> I tried discerning it from TM11-300. I think it's supposed to be a
> 150 H Choke (Part 24) in parallel
> with a 0.01 uF cap (Part 0-2).
The cap is part 9-2, not 0-2 and it is supposed to be 0.001 uF.
> Can anyone confirm?
Well, a 150 H choke would be physically fairly large for a "small" choke. I would have to go to
my storage building and open one of my -AKs up to check, and cannot do that just now.
I hope Wayne can help. If all else fails, I'll make a run to my storage and take look as soon as
I can.
BTW, the -AK version is one of only two other versons which include AF modulation
capability. None of the others have that. This makes the -AK a fully functioning signal
generstor.
Ken W7EKB