Be careful, guys! Most FT-241 crystals were
originally designed and used for "Tank Radios", FM on
about the 10M band. The crystal blanks in the FT-241
holders, however, are NOT ground for the frequency
(ies) marked on the holders, but are *much* lower in
frequency than marked on the case (you'll usually see
a "Channel" number and a frequency marked on the *top*
of the housing).
The (relatively) high frequency shown is the *output*
RF frequency of the transmitter, having been multi-
plied several times for FM-ing the transmitter to get
some deviation. It is *not* the ground-frequency of
the crystal blank.
Karl K - W8TIF
McKinney, Texas
--- Original Message ---
From: William R Colbert <w5xe@juno.com>
To: <qrp-l@Lehigh.EDU>
Subject: Re: Help finding FT-243 Crystals ??? For QRP
frequencies and AM Phone Frequencies
>Likewise at the hamfest, club auctions, etc (I
recently bought a box of ft-243 crystals for 50 cents
at a club auction) don't pass up the FT-241 crystals.
The body is larger than the FT-243 but pin size and
spacing is the same. There are a lot of hamband
frequencies in those types of crystals, and if one
wants to use the non-ham frequency types <snip>
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