On 6/30/11 8:25 PM, A.J. Franzman wrote:
All this talk of line frequency reminds me of when we attached a 'powerful'
audio sig gen to the lecture room clock back in 1968. Got us 10 mins less
boredom.
I always wondered just how
it was done, and the size of the hardware that would be required. Of
course today it's fairly trivial to do in a small package, but back
then, I'm not so sure.
A.J.
I used to own an HP 201B audio signal generator. It was powerful enough
to ring a telephone bell, providing 100V RMS at 20 Hz.
--
David Forbes, Tucson AZ
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