I did something similar as well, I have a neighbor that lives around 700 feet away, he ran a Collins S-Line. I convinced him to buy a K3, which he did.

I did screen grabs of his signal with the K3, and neither of us having a new synth, then when he installed his, then when I installed mine... Big differences, all documented using the P3 at:

https://www.nk7z.net/k3/


73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist, RFI
ARRL Asst. Director, NW Division, Technical Resources

On 1/25/21 4:07 PM, David Olean wrote:
I bought a K3 SN 8858  just before the K3S was announced at Dayton. It had the new synthesizer. I was curious to see what the difference was between the two and ran a few simple tests in my alleged lab using an older K3 as a reference rig.  I found the new rig had a lower noise floor by a small amount (several dB) and was quite a bit better in close in reception near very strong signals. I think I saw no debilitating effects of a 1 milliwatt signal that was 1.00 kHz away from a very weak signal right near the noise floor. I was impressed!  0dBm vs -138 dBm!!

Dave K1WHS

On 1/25/2021 11:33 AM, Mike Kopacki wrote:
Was the KSYN3A synthesizer ever built into the K3 as a standard item? If so, beginning at what serial number?

Thanks,
Mike NJ2OM

On Jan 25, 2021, at 10:51 AM, Henry Pollock - K4TMC <kilo4...@gmail.com> wrote:


Mike,

You can look at the numbers on Sherwood Engineering's Receiver Test Data List, specifically the 5th, 6th and 7th items from the top, and the KX3 is just a few items lower.

73,
Henry - K4TMC


On Mon, Jan 25, 2021 at 10:29 AM NJMike <mikekopa...@gmail.com> wrote:
If a K3 has been upgraded to the latest synthesizer - the KSYN3A - what's the
difference between it and the K3S?

Thanks,
Mike NJ2OM



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