[GreenKeys] ID Unknown TU

[Jack]

Navy AN/SGC1.  Basic RTTY converter, two low tones. 
Jack. K2TTY


Sent from my iPhone

> On Dec 18, 2016, at 6:03 AM, Alf Fisher <alffisher2 at gmail.com> wrote:
> 
> 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
>  
>  
> <Unknown TU.PNG>
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