[AMRadio] Oscillator Filament Voltage change and frequency drift

[W5OMR/Geoff]

Jim Candela wrote:

>Don,
>   
> I'm wondering about those 6AU6's. Not all of us have
>a Sola CVT, so I have another idea. Change the tube
>for a 5AU6, and then take the 6.3 vac (usually
>unbalanced), and 1/2 wave rectify with a low drop
>Schotcky diode (about 0.3 volt forward drop), filter,
>and then run through a 3 terminal low drop 5 volt
>regulator. I'll do some book searching for some
>suitable part numbers. 
>  
>
>

7405?