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Old 23rd Sep 2020, 9:59 pm   #13
trh01uk
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Location: Ross-on-Wye, Herefordshire, UK.
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Default Re: Transmitter Tuning unit TU-5B WW2 Find

Quote:
Originally Posted by Hans PE1KWH View Post
Not quite, One VT4C was used as oscillator and another as PA.
The other 2 VT4C's are used as modulator amp's.
A VT25 was the LF pre-amp or modulating tone oscillator ( MCW ).

The transmitter was capable of CW, MCW and AM putting out something like 35 Watts carrier depending on which band it was used.

Indeed a early 30's design but with a correct power suppy stable enough for the purpose it was used in, short messages from aircraft to ground.

Hans - yes indeed, sorry for posting about the line-up relying on my memory, which is now getting a bit rusty - I was putting one of these brutes on the air over ten years ago. For some reason I was thinking of the Command sets which have a separate modulator.

As you rightly say - it was good enough for air to ground comms.

Richard
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