[Elecraft] To PLL mod or not

[Rod N0RC]

And the answer is, mod the PLL. FWIW I decided that making conclusions
about VFO vs BFO drift, as a function of the audio pitch, a bit
troublesome. So I used a frequency counter. In my case the BFO is very
stable from a cold start, to full warm up in, about one hour. In my
shack, basement, ambient temp is 65-67 Deg. F. after 1 hour the
internal temp of my K2 rises to about 80 Feg. F. Over that temp range
my BFO only changes about 0.1 Hz! The VFO changed about 80Hz. On the
plus side, once warmed up (about 30min) the VFO was very stable.

Thanks all for you help and suggestions.

73, Rod N0RC

----- Original Message -----
From: "Rod N0RC" <rod@n0rc.us>
To: <elecraft@mailman.qth.net>
Sent: Saturday, November 09, 2002 9:28 PM
Subject: [Elecraft] To PLL mod or not


> Folks,
>
> Wonder if I should leave well enough alone? Today I switched on my
K2
> and while it was "cold" I zero beat WWV, the display read 10,000.02.
I
> left the rig on, and four hours later zero beat WWV again. The dial
> read 10,000.06.
>
> I didn't measure BFO drift, frankly I'm not sure how to measure it.
> Ideas?
>
>