[Elecraft] (no subject)

[Bob]

Just as a FYI, from Joe Large (JT65-HF author), concerning JT65-HF, which
is probably the predominant version used on the K3 and KX3....

"If AFC is turned on you can probably suffer as much as 50 to 100 Hz (or
more) drift in a frame.  Just a guess from experience.  There's not need
for very high frequency stability though.  Certainly anything less than 20
hz should be no issue.

73 - Joe  - W6CQZ
"

So JT65 is a lot more tolerant than WSPR and on 20 meters at least the
reported 14 HZ drift is "no issue" according to the author himself.

PS, Tony, I've sent you via private mail the results of some tests I just
ran with my KX3.

73, Bob, WB4SON

On Mon, Jul 16, 2012 at 9:29 PM, Tony Estep <esteptony at gmail.com> wrote:

> On Mon, Jul 16, 2012 at 8:17 PM, Lance Collister, W7GJ <w7gj at q.com> wrote:
>
> > ...makes me wonder about the frequency stability on 6m with full throttle
> > out on JT65A...
>
> ============
> Lance, based on my experiments with JT65HF, you will not get good results
> until the proposed firmware mod that allows you to tweak the temperature
> compensation. JT65 uses a different scheme than WSPR, but it too has
> stringent stability requirements. However, I am confident that Elecraft can
> and will solve this. I am not a 6M ping jockey, but I know that JT65 is a
> must for serious 6M operators, so I'm sure they'll find a way.
>
> Tony KT0NY
>
> --
> http://www.isb.edu/faculty/facultydir.aspx?ddlFaculty=352
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