[Milsurplus] GRC-9 BT-1

[Mike Morrow]

John wrote:

>Just trying to get an old GRC-9 operating. ... What I would like to ask 
>is what the best thing to use for the Receiver Bias Battery (BT-1). Can I 
>just hook up an AA cell, or was it some odd voltage?

John,

The receiver's BT-1 is nominally 4.5 vdc (positive to ground, of course), but the manual says 4 to 6 volts is OK.  You could substitute one of those little 6 v photo batteries like Canon used in the A-1 SLR.  There's virtually no current flow.

The manual (TM 11-263) is pretty common and cheap at about $15.

Good to see your call here.  It's a little different from those QRP lists!

73,
Mike / KK5F