For those of you that
are not at all familiar with the different models of the BC-614(*)
speech amplifier, here are a few I have found. Be aware that not all of
them are the
same and not being familiar with the differences may cause problems
with the BC-610
system when using the speech amp.
The BC-614(I)
The BC-614(D)
The Schematic is ->
HERE
rear view of the "D" model
If you are lucky enough to get the case
for the unit you are buying, it will have the schematic
for the unit under the bottom like so.....
Normally in the SCR-399 or AN/GRC-26
setup the speech amplifier sits on top of the control
box for other equipment in the set, this control box is the JB-70.
With provisions for starting and
stopping the 5 KW generators, controlling the receivers of the
system, and routing audio to and from the various units.