I read in alt.binaries.schematics.electronic that Albert
wrote (in ) about 'MK484
single chip AM radio question', on Mon, 4 Apr 2005:

I hope to use the MK484 single chip AM radio at 20 kilohertz for a very
low power receiver. The spec sheet says it only goes down to 150
kilohertz however.

Is there any reason to suppose it contains a coupling capacitor or
something that would limit the low-frequency response? It seems rather
unlikely. But the definitive test invokes a little-used technique in
these days of calculations and simulations. It's known as 'trying it'.
(;-)

It isn't as if testing at 20 kHz is rocket science, after all.
--
Regards, John Woodgate, OOO - Own Opinions Only.
There are two sides to every question, except
'What is a Moebius strip?'
http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk