[GreenKeys] Valiant FSK question

[Charles Ring W3NU]

John Lawson wrote:

>
>  I've asked this on another forum - but it's a logical question for 
> here, mebbe:
>
>   I am interested to know if anyone here has had any direct (or 
> strongly anecdotal) experience with modifying the Johnson Valiant VFO 
> for 'real' FSK - to be driven from the local loop in some interesting 
> way. Also I want to do this with 'boatanchor tech' - a reactance tube 
> or something similar.  I have a couple of plausible theories worked 
> out, but: "the difference between Theory and Practice is much greater 
> in practice than it is in theory...."
>
>   I know there's a ton of stuff about Valiant audio, etc...  but I've 
> not been able to dig up anything concrete, ie. actual circuits, 
> schemes, etc., about Johnson-specific FSK mods.
>
I did this 35+  years ago. A  very conventional diode fsk keyer iirc 
mounted outside the vfo box. My Valiant vfo was not stable enough for 
narrow shift fsk.