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Total 406 documents matching your query.

321. Re: Topband: QRP/Poor antenna stations ARRL160 (score: 1)
Author: "ZR" <>
Date: Mon, 3 Dec 2012 17:14:11 -0500
I made roughly 40-50 sporadic contacts using a 1939 Meissner VFO at 5-6W and a 1934 National FB-XA, didnt even log them. Nothing spectacular since I wasnt interested in staying up past 10PM (-; Anten
/archives//html/Topband/2012-12/msg00103.html (11,822 bytes)

322. Re: Topband: F fitting adaptors (score: 1)
Author: "ZR" <>
Date: Mon, 3 Dec 2012 20:45:14 -0500
Ive been using those adapters since the 80's when they first showed up and all were imports I believe. Used outdoors they dont all weather well externally but have made reliable connections even when
/archives//html/Topband/2012-12/msg00106.html (8,415 bytes)

323. Re: Topband: F fitting adaptors (score: 1)
Author: "ZR" <>
Date: Tue, 4 Dec 2012 12:48:07 -0500
When using a Ameritron remote antenna switch with SO-239 fittings, does anyone know a supplier for female F fitting to PL-259 adaptor ? Thanks, 73 Bruce-K1FZ Bruce, IMO, you have the wrong switch. A
/archives//html/Topband/2012-12/msg00145.html (10,397 bytes)

324. Re: Topband: one-way propagation (score: 1)
Author: "ZR" <>
Date: Tue, 4 Dec 2012 21:51:01 -0500
It just goes to show that what looks good on paper in theory does not mean it HAS to be the same in the real world. There is nothing to prevent 2 signals a continent away and with different antennas
/archives//html/Topband/2012-12/msg00166.html (11,274 bytes)

325. Re: Topband: Not so Boring report (score: 1)
Author: "ZR" <>
Date: Sat, 8 Dec 2012 20:35:26 -0500
I used to work EU on 6-10M crossband in those days since very few had authorization. Ireland was one that did and quite a few were on. My rig was a HB 6AG7, 6V6, 829B crystal controlled with PP 6L6 m
/archives//html/Topband/2012-12/msg00282.html (10,528 bytes)

326. Re: Topband: Fw: Re: : antenna question ...this is not going todieqiuite yet.................... (score: 1)
Author: "ZR" <>
Date: Mon, 10 Dec 2012 22:30:35 -0500
And one should never rely on a single source of information unless it has been well vetted. That is something that wont happen on Antennex but there are enough qualified people on Eham and here to se
/archives//html/Topband/2012-12/msg00297.html (11,191 bytes)

327. Re: Topband: The Idiot's Guide To Bi-Directional Two-Wire BeverageConstruction... (score: 1)
Author: "ZR" <>
Date: Thu, 13 Dec 2012 19:08:57 -0500
Which is why military telephone wire as well as old rural Copperweld pairs are so popular;pacing is a constant and self twisting during installation is a given. Calculated self impedance agrees well
/archives//html/Topband/2012-12/msg00364.html (10,682 bytes)

328. Re: Topband: Elevated Radials Questions (score: 1)
Author: "ZR" <>
Date: Thu, 13 Dec 2012 20:51:27 -0500
The only place Ive found tuned elevated radials being discussed so much is on ham forums. A bit over 20 years ago I installed a slanted wire 1/4 wave vertical for 160 coming off the top guy wire of a
/archives//html/Topband/2012-12/msg00365.html (12,489 bytes)

329. Re: Topband: GAP Vertical Question (score: 1)
Author: "ZR" <>
Date: Sun, 16 Dec 2012 22:08:40 -0500
I can think of NO earthly reason,that makes ANY electromagnetic sense to me, as antenna engineer fo placing a radial system under the end of a vertical 1/2 wave antenna - "earth-worms" not >withstand
/archives//html/Topband/2012-12/msg00451.html (16,535 bytes)

330. Re: Topband: Ground mounted 1/2 and 1/4 wave verticals (was GAP) - A Hoot! - A "Dream"? (score: 1)
Author: "ZR" <>
Date: Mon, 17 Dec 2012 21:40:36 -0500
I worked in one for several years testing my designs but this was at 2.4 and 5.6GHz. Long before that it was as a range tech for a defense contractor designing/building/installing military EME arrays
/archives//html/Topband/2012-12/msg00493.html (19,798 bytes)

331. Re: Topband: Inverted L question (score: 1)
Author: "ZR" <>
Date: Wed, 26 Dec 2012 16:13:52 -0500
I am right now using an inverted L which is spaced about 4 feet away from my tower. The vertical leg is about 85 feet. I only have 6 radials at the present time Now here is the question The horizonta
/archives//html/Topband/2012-12/msg00595.html (9,353 bytes)

332. Re: Topband: Fw: Short Bogs (score: 1)
Author: "ZR" <>
Date: Sun, 30 Dec 2012 15:04:21 -0500
If youre building a Beverage/BOG as the thread title indicates, resonance does not matter, it is a nonresonant slow wave antenna. For a resonant antenna up in the air and used for transmitting the in
/archives//html/Topband/2012-12/msg00616.html (9,919 bytes)

333. Re: Topband: Trees (not the N6TR kind) (score: 1)
Author: "ZR" <>
Date: Mon, 31 Dec 2012 18:18:25 -0500
Pine trees taller than 100 feet could be an issue, since they could be near resonance and lossy - a sad combination when within a wavelength or so of vertically polarized antennas. If your trees are
/archives//html/Topband/2013-01/msg00002.html (10,853 bytes)

334. Re: Topband: Blessed With Too Many Trees? (score: 1)
Author: "ZR" <>
Date: Wed, 2 Jan 2013 16:51:23 -0500
Ive personally seen the results of HF to 2M QRO (usually legal or close to it) on trees when concentrated by yagis that were barely above them. Id be there as a visitor or doing tower/antenna work an
/archives//html/Topband/2013-01/msg00019.html (9,774 bytes)

335. Re: Topband: Power Line Noise Detecting (score: 1)
Author: "ZR" <>
Date: Fri, 4 Jan 2013 21:46:45 -0500
I use an old CATV RF sniffer that was $10 at a hamfest, they got replaced whenever the systems added more bandwidth and are used by the techs to certify a new build or later to do leakage tests. Tune
/archives//html/Topband/2013-01/msg00030.html (8,685 bytes)

336. Re: Topband: A 160 Meter antenne puzzle (score: 1)
Author: "ZR" <>
Date: Tue, 8 Jan 2013 12:20:58 -0500
Is the 4x4 pressure treated? Or from a local sawmill and uncured? Both will have an effect. Carl KM1H Hi everybody and happy new year . I have what I think is an interesting antenna riddle . I have s
/archives//html/Topband/2013-01/msg00054.html (9,544 bytes)

337. Re: Topband: Heater Choke Value (score: 1)
Author: "ZR" <>
Date: Thu, 10 Jan 2013 16:52:23 -0500
Typical reactance rule of thumb is 5 to 10X the input impedance of the tube(s). In some cases it is much less and the 160M input network is modified to compensate. than 12 and require a lot less ferr
/archives//html/Topband/2013-01/msg00071.html (8,489 bytes)

338. Re: Topband: 160 shunt fed tower update (score: 1)
Author: "ZR" <>
Date: Fri, 11 Jan 2013 18:32:55 -0500
When we last left this adventure, I was shunt feeding my 110' tower on 160, which supports a multitude of yagis and wires. Unfortunately, I was coupling so much energy into the 80 meter wire array th
/archives//html/Topband/2013-01/msg00079.html (10,813 bytes)

339. Re: Topband: Help with RFI (score: 1)
Author: "ZR" <>
Date: Sun, 13 Jan 2013 12:35:03 -0500
Im running shielded CAT 5e from the router up in the office to the basement and none of the rigs bothered it but I did have to use a single 31 core at the router outputs to eliminate its noise; the 6
/archives//html/Topband/2013-01/msg00097.html (9,107 bytes)

340. Re: Topband: alternative to vacuum variables (score: 1)
Author: "ZR" <>
Date: Thu, 24 Jan 2013 20:30:22 -0500
Pete, I used a big 300pf breadslicer with somewhere in the 7.5 to 9KV range ( I forget the spacing, it was a vintage Johnson) and a couple of 857 size ceramic caps for my Omega at a prior QTH. Smalle
/archives//html/Topband/2013-01/msg00188.html (9,000 bytes)

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