[Hallicrafters] Hallicrafters 465 khz crystal substitute?

[Dick Blaney]

There were 2 series of chrystals in the approximately 440 kc to 500kc range
used for frequency control in the 2 WW2 FM tank transmitters.  I don't
recall the mijlitary designations, but one multiplied the xtal frequency by
54, and the other multiplied it by 72.  One series had an output around
25000 kc, and the other was around 33000 kc.  Many hams used to make xtal
lattice filters around 455 kc for receivers and for early homebrew SSB
transmitters using these surplus xtals.  Hope this helps.  Dick, WB8MHE

----- Original Message -----
From: "Ken Haydu" <darla at bcinet.net>
To: "Hallicrafters" <hallicrafters at mailman.qth.net>
Sent: February 14, 2003 1:03 PM
Subject: [Hallicrafters] Hallicrafters 465 khz crystal substitute?


I have twice run into a crystal marked "Channel 51  25.1 MC" in the crystal
filter socket for the SX-17 and SX-16,  which have an IF of 465 khz.

I am wondering what type radio  this crystal may have been intended for,
and is it indeed a 465 khz crystal?

Thanks for any information,

Ken

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