[Heathkit] Heath audio, rough around the edges.

[Grant Youngman]

> has allowed me to find those -20 dB points. I would think the 
> spectrum analyzer could be replaced by a AC voltmeter at the 
> speaker terminals, 

At that point, however, you're also measuring the response of everthing in
the radio following the filter -- detector, audio stages, etc.

An RF voltmeter (like a 410B/C, etc) or scope at the output of the filter
seems like a better option.

Grant/NQ5T