[Elecraft] Slight K2 Drift When on PSK31

[EricJ]

I agree, Jerry. I don't use my K2 for PSK. I use my xtal-controlled PSK20,
and I have the exact symptoms as Les. I'll try your tip next time I'm on.
Which may be awhile. I have been deeply immersed in PICs and SPICE (for
unrelated reasons) and haven't been on for more than 2 or 3 QSOs since the
end of April!

Eric
KE6US

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of NR5A
Sent: Friday, June 10, 2005 10:45 AM
To: Lynn and Les; Elecraft at Mailman. Qth. Net
Subject: Re: [Elecraft] Slight K2 Drift When on PSK31

I have ran across the same problem but I don't think its the K2. I believe
its a software thing. When running the Digipan program click on Options and
make sure AFC and Snap are not checked. When I did that it pretty much went
away for me. Like I said I don't think its a K2 problem but would like to
see comments on this also.

Jerry - NR5A - South Dakota
----- Original Message -----
From: "Lynn and Les" <lynnandles at earthlink.net>
To: "Elecraft at Mailman. Qth. Net" <elecraft at mailman.qth.net>
Sent: Friday, June 10, 2005 4:36 AM
Subject: [Elecraft] Slight K2 Drift When on PSK31


> I have now operated K2 S/N 4751 for about a month and everything seems to
> work pretty good. I am mainly a PSK and RTTY operator and I would like to
> know if others have had the same experience about the K2 with PSK.
>
> The narrow band width with PSK requires a stable radio. I see sporatic
cases
> on receive where a station transmits a "waterfall" line and then stops to
> receive a signal. When the station restarts transmitting again, the K2
> receiver has drifted about 1/3 the width of the average waterfall line.
This
> drift (10-20 HZ I think) requires me to reclick on the waterfall line to
> recenter the cursor so Digipan 1.6 can continue to decode the "waterfall
> line" information. Last night , I got a similar report on transmit as
well.
> The effect appears sporatic. Right now, this is an bother - not a fatal
> defect, BUT my old ICOM 706MIIG never exhibited this drift . So has
anybody
> seen this effect before. Obviously, CW, SSB and RTTY seem unaffected by
this
> drift.
>
> * Is this drift normal for the K2?
>
> * If not, can I reposition the thermal sensor card (i.e., tilt it
slightly)
> to get better performance?
>
> * Also, at what power levels do most people run a barefoot K2 in PSK? (I
get
> slight heating of the heat sink (~100F) and I am thinking that the heat
> effects the PLL)?
>
> 73,
>
> Les WA3SGZ
>
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