[Boatanchors] WANTED: FT-243 Crystal for 7160 khz

[Glen Zook]

Also, I have noticed that, depending on the individual transmitter, the crystal will oscillate on different frequencies.  Of course, the type of oscillator and the tolerances of the components affect the actual frequency.

This is why the commercial FM two-way crystal controlled units had a "warping" circuit which was used to "net" the oscillator to the correct frequency.

As for not noticing a difference:  With most of the receivers used by Novice Class, and, for that matter, a lot of higher class operators, in the "goode olde dayes", even being as much as 4 or 5 kHz away would not be noticed.
 
Glen, K9STH


Website:  http://k9sth.com


________________________________
 From: L L bahr <pulsarxp at embarqmail.com>
To: Glen Zook <gzook at yahoo.com> 
Cc: boatanchors at mailman.qth.net; Al Klase <ark at ar88.net> 
Sent: Monday, May 13, 2013 10:39 PM
Subject: Re: [Boatanchors] WANTED:  FT-243 Crystal for 7160 khz
 

Back in 1953 as a Novice, Glen, I would have never noticed a 2 kHz error with my trustee Hallicrafters S-38C !  Back then I was mainly on 3735 kHz because Burstein-Applebee was selling that surplus FT-243 crystal for 35 cents.  They had a bunch of them for that frequency.  I was using an Eldico TR-75TV transmitter.  In Feb 1954 I became a General and bought a Globe Scout 40A.  I was rock bound with that rig mainly on 3950 as it was the Wisconsin calling frequency until Heathkit came out with the VF-1 VFO.  I think I paid around $13.00 for it including shipping.  That opened up a new world to me.