[Milsurplus] WW II Morale Amp

[J. Forster]

Opinions please:

The more I look at a 1 tube Morale Amp from the MASSACHUSETTS the more I
believe it was a modified cheap phonograph. The design is AC/DC with a
single 117N7 tube; input and output transformers, and very little else.
The purpose was to amplify audio from a 600 Ohm bus to drive a small
speaker in the officers' staterooms. The buses were driven by RBOs in
Radio 2.

I suspect some of the crew went into Boston to Radio Shack and bought a
few record players. This would have been in 1941-42.

A cheap phonograph could have had a high output, crystal cartridge and a
simple, very low parts count amp, probably built on an "L" shaped plated
steel chassis.

The crew would have bought a couple, pulled the chassis and speaker and
added the input transformer and possibly changed the volume control.

Does this seem plausible?

Best,

-John

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