[Milsurplus] BC-611 F Data Needed

Mark K3MSB mark.k3msb at gmail.com
Mon Apr 20 20:36:39 EDT 2020


Good Evening All --

Since I'm working at home I had to move my software development gear from
my office into the shack, making things a bit tight.    I put off
continuing work on the TBW-HF until some room frees up.

In the interim (after fixing my friends HW-16/HG-10B) I decided to look at
my pair of BC-611F radios.  Both radios look great on the inside (anti
fungus coating is a wonderful thing.....) and outside.   I had a minor PTT
switch issue on one, but I think that's fixed.     Prior to power it up I
wanted to do some basic resistance checks but discovered there is no
resistance table in the manual TM11-235.   Might anyone have one?

Comparing the two "innards" I quickly discovered one of the boards had some
missing components:   C27, R26,C13, and R1.   Since C27 connects V4 and V5
I'm a bit worried.   However, looking at the board,  it looks as if these
components were never there in the first place.  There is no evidence that
they were removed.

I'm sure there were changes to the 611-F through it's lifetime.   I have
TM11-235 May 1945.   I wonder if any of you have a different version out
there and could send me the schematics page (which is figure 55 in my
manual -- the one from BAMA).?

Even the board that has all the parts is giving me some strange resistance
readings.

73 Mark K3MSB
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