[GreenKeys] ID Unknown TU

[Alf Fisher]

Hi GKers,

Please can anyone identify the TU in the attached picture.

Its a two tone converter that was used with M28 machines in the late 1950s

I’m told its AN/GCx-xxx  

I’m sorry its just a small picture copied from a pictorial diagram in a book and it isn’t all that clear but if you have seen one, I’m sure you’ll know it.

Many thanks for looking.

73,
Alf
G3WSD

 
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