[Boatanchors] FS: ARC5-looking 40m transmitter
bcarling at cfl.rr.com
Sat May 12 21:04:18 EDT 2012
FOR SALE - Navy transmitter for 40m band.
Dial reads from about 7.0 - 9.0 Megasickles.
Includes two 1625 FInal RF power tubes for plenty of oomph.
To me it looks just like any other ARC5 style radio, but the experts warn that his is not
actually an "ARC5" as far as purists are concerned. For someone who enjoys military radios
or actually getting something fun on the air with tiubes it will be just fine I am sure!
One place that I read (maybe a web site) says that it is part of the AN/ARC-5 Command
Radio Set. Analogous to type BC-459-A, T-22/ARC-5 transmitters. It would have typically
been paired with a CBY-46106 receiver, similar to the BC455-B and R-27/ARC5 receivers.
It also stated that the AN/ARC-5 Command Radio Set is a series of radio receivers,
transmitters, and accessories used to provide two-way Morse code and AM radiotelephone
communication for U.S. Navy aircraft during World War II and the years following. It was an
improvement of the Navy's ARA/ATA command set. Similar units designated SCR-274-N
were used in U.S. Army aircraft. The Army set is based on the Navy ARA/ATA, not the later
AN/ARC-5. (perhaps this one is part of the ARA/ATA instead of ARC5? You be the judge!
Covers 7.0 to 9.1 MHz. Comes with all tubes, including the magic eye tube, the covers, all
coils, etc. There are some paint chips off the top and front, but can be easily restored. Overall
in very good condition for its age. SERIAL number is 665.
Technical Data: The transmitter can run 40 watts on CW, and would draw approx. 9 amps at
28 volts in operation although it works satisfactorily between 22 - 30 volts input. The circuits
of the transmitter are as follows: A master oscillator (1626) excites a pair of beam tetrode
power tubes (1625) connected in parallel. An antenna coupling control is used to vary the
coupling between the output tank and the roller inductor loading coil. The transmitter could be
modulated using screen grid modulation or plate modulation. This style of transmitter was
used by many amateurs after world war two, but many were modified or stripped for their
high quality components, particularly the variable capacitors. The sets had an extremely good
name for their frequency stability. This unit uses tubes which look great. The two 1625 tubes
test good. There is no crystal, as in most of these radios. It appears to be missing the VFO
shield and inductor trim slug. Otherwise, complete with all original knobs and tubes, and is in
Available for $75.00 plus shipping.
Pictures and details at:
73 - Bry, AF4K
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