[Milsurplus] FS: BC-187A Transmitter, covers 2400 - 3700 Kilocycles.

Michael, W1RC subs at w1rc.net
Fri Nov 30 22:40:15 EST 2012


Another goodie that must go due to moving to a smaller QTH:  This is 
a BC-187A Transmitter, covers 2400 - 3700 Kilocycles.  Made by Allen 
B DuMont Laboratories, contract number 948-Phila-42.    The two tubes 
are missing.  It uses a VT-25 triode oscillator and a VT-55 amplifier.

It is part of the SCR-178; a pre-WWII design army field equipment 
that was meant to be transported on mules, among other ways, and was 
used in WWII. The equipment covers 2.4 to 3.7 MHz. The equipment 
includes the BC-186 receiver, BC-187 transmitter, and BC-188 
modulator. I had a BC-186 receiver as a kid that I used for some 
attempted QRP field work. The set can be operated on 80 meter CW, 
though it is a bit challenging, the receiver is a regen design - 
tuning is very fast and spotting the TX is hard, as the RX overloads 
easily. The TX is a two tube MOPA that puts out about 8 watts into a 
low impedance load.

If you are not familiar with the BC-187A here's a link with 
schematics and pictures.

http://people.csail.mit.edu/sw/html/NS1W/scr-178.html

I am asking $250.00 plus shipping for the transmitter.  It is in 
clean and original condition.

If interested please reply by e-mail.

73,

Michael, W1RC






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