[Milsurplus] NAF 68304 Nay Beam Filter

Bob Camp ham at cq.nu
Thu May 31 21:42:34 EDT 2007


Hi

Back before there was dirt, they had a navigation system that put a  
1Kcps tone on an AM signal. The signal also carried voice information.

The filter went between the radio and the headphones. You could  
switch it to "beam" for the navigation signal (band pass), to "voice"  
for the information (notch) or to "both" (pass).

Bob
KB8TQ


On May 31, 2007, at 9:07 PM, Mark W1EOF wrote:

> Navy Beam Filter NAF 68304
>
> Anyone got any info on this? Where it was used? Purpose? Where can  
> I locate a book or at least a schematic on it?
>
> Thanks guys!
>
> Mark W1EOF
>
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