[HBR] [Glowbugs] Quartz Crystal Oscillator

[Jim Wiley]

John -


I doubt what you have in mind will work.   You are attempting to move 
the crystal almost 20% in frequency - which I think is not very likely.  
Such "rubbering" is usually limited to much less than 1% of the 
"nominal" crystal frequency.   Unless you are using a specially designed 
VXO (a so called variable crystal oscillator) - most crystals will only 
"move" on the order of 0.1% - which would be about 59 Hertz!  - rather 
less than the 9.5 kHz you are looking for.   These numbers may not be 
exact, and will change depending on the type of cut the crystal uses, 
and other factors, but you get the idea.


- Jim, KL7CC



John Landrigan wrote:
> How practical is this device (Russian tube type quartz crystal oscillator) to use in place of a FT-243 quartz crystal as the second oscillator for a 50 KHz 2nd IF in an HBR styled receiver?
> Ebay # 260829157003
>
> I was hoping to procure a wiring diagram and then put a capacitor in series to adjust from the 59 KHz to the 50 KHz IF frequency.
>
> John KA4RXP and Jody KG4VES
>
>
>