If you go back a little further than 70 years,
you may well find that as the recommended procedure in the ARRL Handbook.
Jerry, KE7ER
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On Wed, Sep 23, 2020 at 10:45 AM, Larry Rothman wrote:
How about a chunk of germanium from an old crystal set? - you could poke
around on its surface for just the right spot...... ;-)
( #quoted-172720634 )
