[AMRadio] Audio Warble?

[Geoff/W5OMR]

Bow wrote:
>  
> Anyone have a single 12AX7 mic preamp schematic?
>
> I could roll my own for a change...

Here's a high-impedance microphone input circuit that might help..

http://www.qsl.net/wa5bxo/xtal-mic-eq.gif

You could get any old tube-type PA system, and use an interstage audio 
driving transformer to go between the plates of the output tubes and the 
grids of the Class A modulators.

-- 
Driving your AM Rig without a scope, 
is like driving your car at night, without headlights. (K4KYV)

--
73 = Best Regards,
-Geoff/W5OMR