[HBR] Re: GB> RSGB Keyer

[Mike McCarty]

Ian Wilson wrote:
> Sorry, wrong schematic. The ARRL version (1962, p252) has
> the additional resistor.

I can't comment on a schematic I don't have. However, adding
a resistor there simply reduces the net Thevenin effective
resistance of the pot. This oscillator is really hard to
characterize, as I mentioned. It's partly a Hartley like
circuit (similar to TNT), partly a tickler feedback, and
partly a relaxation oscillator. The plate pot modifies
the relaxation part of the circuitry, as does the speed pot.
Anyway, it's worth trying. A 'scope would go a very long
way in troubleshooting this circuit.

Mike
-- 
p="p=%c%s%c;main(){printf(p,34,p,34);}";main(){printf(p,34,p,34);}
Oppose globalization and One World Governments like the UN.
This message made from 100% recycled bits.
You have found the bank of Larn.
I can explain it for you, but I can't understand it for you.
I speak only for myself, and I am unanimous in that!