[GreenKeys] Eric Volpe demodulator board

[eric]

Hey, this is great! It looks like a real improvement over my old board. 
And I'm glad to hear you can still get the 2211 chips.

-eric

On 2025-01-14 12:54, Ken LoCasale wrote:

> Gang,
> 
> With the great internet rtty feeds that are becoming available, 
> re-newed interest in mechanical printers, and Eric Volpe's permission, 
> I have made his RTTY PLL Demodulator pcb available again. I retained 
> his component designations and board size so his original documentation 
> can be used. I added a couple of features that do not degrade from his 
> original design and reflect the common components I was able to find 
> easily. Hopefully this will result in the dusting off the old Model 15 
> in your garage. The cost of the board is free, and the new layout can 
> be found on the qrpbuilder.com site at:
> 
> https://qrpbuilder.com/volpe-rtty-demodulator-revisited
> 73, Ken - wa4mnt
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