The thumping in the headphones on 15 meters is not an uncommon problem. Try
it on 10, and it will probably be more pronounced, and even more so if you
run power. You need to wrap the end of your headphone cable around a
ferrite loop like the FT-240 43 or 77 mix. That fixed the problem for me
and for a few others here on the list.
Ron Castro
Chief Technical Officer
Results Radio, LLC
----- Original Message -----
From: "John B. Egger" <john_egger@comcast.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Tuesday, November 07, 2006 7:54 AM
Subject: [TenTec] SS last weekend
> I've only had my O2 for six weeks, so the Sweepstakes was a real
> learning experience. A few observations:
>
> RFI: I couldn't exceed PWR 50 on 80m without wreaking havoc with the
> computer; other bands were OK at full power (I normally set PWR 70), but
> on 15m keying produced a loud thump in the headphones.
>
> BW/PBT: This was fantastic. On one occasion a weak signal had nearly the
> same pitch on 40m as a lot of commercial QRM. BW narrowing didn't do it,
> but adding PBT took the QRM right out. (My Icom 706 has the 250Hz filter
> and PBT; I wonder how it would have handled this?)
>
> Noise: I didn't use the blanker; on occasion the NR was helpful. Nothing
> coped with the electric light-rail that runs 75 feet from my back door,
> though. It swooped by (and the noise in the receiver, on 40m, sounded
> just about like the audible sound in the back yard) as I was trying to
> work my only PAC, and all I could do was wait for the train to pass.
> Fortunately the KH6 was patient. [Having those tracks there isn't as bad
> as it sounds. They were unused for many years, and are elevated and
> separate the backyard from several acres of scrub-covered vacant land,
> classed as flood plain. It can never be developed and served as a great
> playground for the kids, when they were here, and the cats.]
>
> Logging: I desperately need a Linux logging program! I tried to install
> LiHaLo but am not that good at MySQL. Using StarOffice Calc's
> spreadsheet, I relied on "autocomplete" as a dup checker... it usually
> worked, but sometimes I had to use CTRL-F "Find," which really took
> time. Manually entering FQ and time also was delaying. I bet some who
> asked for a repeat on my NR simply didn't believe it was so low!
>
> Speed: Experience has taught that my call, with its HH, produces many
> errors at high speed, so I turn it down to about 25 wpm.
>
> My setup: O2, MFJ 993B autotuner, ancient (pre-WARC) Cushcraft ATV-5
> vertical on the roof, with about 1 functioning radial for each band,
> Astron VS-35M. Results: 370 QSOs, 75 sections, 49 states (missed AK).
> Hours worked maybe 12; I had job work to squeeze in that weekend also.
>
>
> --John K3GHH
> Registered Linux User #291592
>
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>
>
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