Upgrade manual question- PLL Frequency Stability at 7182khz

classic Classic list List threaded Threaded
1 message Options
Reply | Threaded
Open this post in threaded view
|

Upgrade manual question- PLL Frequency Stability at 7182khz

Chris Waldrup
Hello,
My mom got me the upgrade kit for Christmas.  I just started on the project, and I already have a question. In the Frequency Stability Test part of the A to B manual (page 5) I went to 7182 khz, lower sideband, with filter 1 selected.  I activated CAL FCTR, and the frequency at TP1 is 12095.60 and the frequency at TP3 is 12095.63.  The manual said that they should indicate the same frequency. I see from my test that they aren't the same frequency.  

My question is this... I see an blank in the manual where I am supposed to write in a 40 meter frequency range where the VCO and PLL reference oscillator frequencies are equal. However when I am in CAL FCTR I see a frequency in the 12 Mhz range displayed. How is the best way to correlate the 12 Mhz range frequency with the 40 meter frequency. Could someone explain the procedure a little better to me?

I listened to a QSO near 7178 and it sounded fine.  I tuned to 7182 and in the background hiss I could barely detect some thing that might be called wavering.  Should I do the mod anyway?

Thank you.

Chris
KD4PBJ

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
 http://mailman.qth.net/mailman/listinfo/elecraft   

Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com