[Elecraft] Using K3 with CW Skimmer

[Joe Subich, W4TV]

Pete,

LP-Pan does not use an 8125 KHz crystal to prevent the oscillator
leakage from getting back into the K3 IF strip and to offset the
"DC spike" from many sound cards.  The crystal used divides down
to approximately 8131.6 KHz which results in the audio frequency
being shifted by -6150 Hz (+/-).

It's been a while since I looked at the LP-Pan schematic/details
so the numbers may be off a bit.

73,

    ... Joe, W4TV


On 2015-02-04 5:37 PM, Pete Smith N4ZR wrote:
> Update - I don't understand how or why, but if I set CW Skimmer's "Audio
> IF" to -6150 Hz, that brings the K3 and CW Skimmer frequency readouts
> into agreement.  There is an explanation of audio IF in the Skimmer help
> file, but I can't get my brain around it.
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network at
> http://reversebeacon.net,
> blog at reversebeacon.blogspot.com.
> For spots, please go to your favorite
> ARC V6 or VE7CC DX cluster node.
>
> On 2/4/2015 4:37 PM, Pete Smith N4ZR wrote:
>> I've been experimenting with using the K3 with CW Skimmer to work K1N.
>> I'm feeding LP-Pan 2 from the K3's IF, and running CW Skimmer if
>> Softrock IF mode.  I'm using Omnirig to read the K3s frequency and
>> control it.  This works super well at least down through 15 meters - I
>> can see the first 10 KHz of the pileupabove K1N's transmit frequency,
>> and see exactly where he last worked someone.
>>
>>
>> However... I just tried the same technique on 30M, where K1N is
>> currently at 10113.1.  I can't see him or his pileup at and above that
>> frequency, but if I tune the radio down to 10107.9, ghe appears on the
>> waterfall with the expected humongous pileup over the next few KHz
>> above.  So now I'm wondering, is the relationship between IF frequency
>> and dial frequency perhaps different on the lower bands? Has anyone
>> tried this same thing and been able to make it work on 40 and below?
>>
>
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