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The
unit pictured above is designated on its tag as being used with a TBM
transmitter. It is AC/DC powered and uses a push-pull pair
of 35L6 for a speech amplifier. A lot of tube to make a line level
signal.
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| AM Phone from the Couch |
Trying
to copy 5-character groups, 5 groups behind at 35WPM is a very intense
experience. For a more relaxed radio session, I have installed
this radiophone remote next to one of the living room couches.
Hope it looks enough like a phone that it will be allowed to
remain. The shot above approximates closely
my participation in the Old Military Radio Net of July 15,
2006 on 3885kc. The only thing missing is the cup of java.
This
unit was connected to key and drive my TCK transmitter, and receive
audio from whatever receiver I plugged a long cord into. The TCK
has two input windings on the speech amplifier input. One is for
the local microphone and the other is a 500 ohm line level input that I
connected this unit to.
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| CRV-50254 Speech Input Equipment |
This
unit is designated "For General Radio Use" on its tag, but its manual
assigns it to the TBL-2 transmitter. It has several stages of AF
amplification, with push-pull 6V6s producing a couple of watts of
output. It has front panel control of transmit and receive audio
gain, and a switch to select between two receivers.
I am using this to control and drive a homebrew transmitter that uses a pair of 811As in the modulator.
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