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- Subject: Re: [IRCA] Puyallup, WA Ultralight TP's for 11-22
- From: Mark Connelly <markwa1ion@xxxxxxx>
- Date: Mon, 23 Nov 2015 12:16:29 -0500
- Delivered-to: irca@xxxxxxxxxxxxxxxx
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The subfreezing cold made it tough to stick around in the frozen back yard after around 1520, though, and TP signals were dropping off for the most part by that time. Overall the session was one of the best of November, and hopefully an indication of better DX to come.
...
73, Gary DeBock (in Puyallup, WA, USA)
7.5" loopstick C.Crane Skywave Ultralight +
15" FSL antenna
>>
I think you need to figure out a way to get the DXing indoors somehow, Gary.
Options:
(1) Varactor tuning of sizeable passive loop, pick-up link winding couples to speaker wire or coax. feed back to shack. DC for varactor tuning can be passed out on feedline through RF chokes / DC block cap's scheme, e.g. bias tee. (Similar to how DXers are running remote Vactrol resistance control for termination null adjustment.) Feedline signal can be coupled to INDOOR portable via link wound on ferrite rod, or sent directly to a communications receiver or portable that is equipped for low impedance signal input.
(2) Install passive BROADBAND loop in backyard (either terminated or figure-of-8 type), bring signal into shack, link-couple to tuned loop used adjacent to a portable radio, or go through a tunable preselector (active or passive) en route to a standard receiver input. In-shack broadband amplification (e.g. DX Engineering RPA-1) of the loop feedline RF is also possible if you "allow" active devices to be used. Battery power would be advisable to keep indoor noise sources out of the system.
Outdoor broadband loop reference drawings:
http://www.bamlog.com/broadband.htm (figure-of-8 pick-up)
http://www.bamlog.com/superloop.htm (cardioid pick-up)
Maybe try some one of these ideas and you'll be "the DXer who came in from the cold."
Mark Connelly, WA1ION
South Yarmouth, MA
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