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

[L L bahr]

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.

Lee, w0vt (ex WN9DRC and W9DRC) 

----- Original Message -----
The frequency tolerances on FT-243 crystals is not all that good!  Also, by loosening the 3-screws that hold the face-plate on the holder, you can often adjust the frequency.

A number of the "olde tyme" Novice crystal manufacturers listed either 0.01% to 0.03% tolerance for their crystals.  At 7000 kHz 0.01% equals 700 Hz and 0.03% equals 2100 Hz.
 
Glen, K9STH


Website:  http://k9sth.com


________________________________
 From: "telegrapher at q.com" <telegrapher at q.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 9:38 PM
Subject: Re: [Boatanchors] WANTED:  FT-243 Crystal for 7160 khz
 

I've got a fist full of 75 and 40 meter xtals here, FT-243 types of course and almost all of them are 200-300 cycles off what the label shows.  

Who knows if that's the way they were spit out at the factory or if it is just due to aging?  Close enuff for AM work though.
______________________________________________________________
Boatanchors mailing list
Home: http://mailman.qth.net/mailman/listinfo/boatanchors
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Boatanchors at mailman.qth.net

List Administrator: Duane Fischer, W8DBF
** For Assistance: dfischer at usol.com **


This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html