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Total 421 documents matching your query.

241. [Amps] Metric system (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Thu, 4 Aug 2005 12:55:04 -0400
Dear George, With all the cellular BTS's now on the E-911 system with GPS antennae all fixed and pouring data into the network, the global picture resembles a ball of Jello, albeit on a small scale a
/archives//html/Amps/2005-08/msg00103.html (6,903 bytes)

242. [Amps] Conversion Nightmare (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Thu, 4 Aug 2005 20:12:32 -0400
The Royal Enfield motorcycle that in the 'Fifties and 'Sixties was a product of Great Britain, has resurfaced and is now manufactured in India. This one machine, available in one color, drab green, s
/archives//html/Amps/2005-08/msg00130.html (6,961 bytes)

243. Re: [Amps] Conversion Nightmare (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 5 Aug 2005 13:04:08 -0400
You are entirely correct. While doing this exercise on cellular tower tops it was necessary to hand-trim the heliax "just so," because right after, the Wiltron Sweep Tester would be applied, and any
/archives//html/Amps/2005-08/msg00183.html (8,523 bytes)

244. Re: [Amps] Plate choke resistance (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 6 Aug 2005 12:21:49 -0400
Dear Angelo, Plate chokes are the one place that there is absolutely no fixed information to follow. There are several factors when building amplifiers and winding your own chokes: The choke wire gau
/archives//html/Amps/2005-08/msg00211.html (8,497 bytes)

245. [Amps] Spies In Computers (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sun, 7 Aug 2005 13:57:56 -0400
There are many concerns using embedded software to watch what computer users do with their installations and report it to their distant masters. These are called "spyware." A decent freeware program
/archives//html/Amps/2005-08/msg00248.html (8,388 bytes)

246. [Amps] Audio-Tomfoolery (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Fri, 12 Aug 2005 18:58:13 -0400
The other day a poster here said something about a $2K linecord and I thought there was a mis-key. However, today the hard catalog came from MuusicDirect, http://www.musicdirect.com and I see he wasn
/archives//html/Amps/2005-08/msg00453.html (8,059 bytes)

247. [Amps] Step-Starts (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 13 Aug 2005 07:58:38 -0400
Gents, In building step-start units to ease the trauma of powering up various amplifiers a number of issues were addressed: The filter capacitors present an almost dead short when first being charged
/archives//html/Amps/2005-08/msg00459.html (7,618 bytes)

248. [Amps] mind control ray stopper (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Sat, 13 Aug 2005 16:35:08 -0400
GOTO: http://www.stopabductions.com for the latest in mind-ray control devices. Tinfoil helmets are NOT OPERATING anymore. The new technology uses layers of 3M Antistatic (Velostat)bag plastic in a f
/archives//html/Amps/2005-08/msg00470.html (6,678 bytes)

249. [Amps] Palstar DL5K 5KW load (score: 1)
Author: "Harold B. Mandel" <ka1xo@juno.com>
Date: Wed, 17 Aug 2005 18:21:22 -0400
When opening up the Palstar DL5K dummy load the owner can spot a ceramic capacitor at one end of the two load resistors. As well, the input line goes through a metal box that serves as the pickup for
/archives//html/Amps/2005-08/msg00580.html (6,610 bytes)

250. Re: [Amps] 4-1000 (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sun, 11 Sep 2005 13:52:59 -0400
Dear Rich, 1. What anode voltage and current is your supply rated at? 2. What resistance and wattage bleeder did you go with? 3. Did you use a 200 to 400 watt, 25 ohm anode protection resistor? 4. Di
/archives//html/Amps/2005-09/msg00092.html (7,513 bytes)

251. Re: [Amps] Project Boxes... (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Mon, 12 Sep 2005 12:58:12 -0400
Dear Dino, Rack mount work is easier than enclosure. You can use flat plate or sheet stock and drill the front panel accordingly. I would suggest side rails in the rack enclosure to support the weigh
/archives//html/Amps/2005-09/msg00099.html (8,791 bytes)

252. [Amps] RS-232 (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sat, 17 Sep 2005 20:14:31 -0400
The Cingular build-out is installing Emerson/Lorain power plants that are the latest of the latest in Cell-Site DC Power. The Monitoring, Control and Alarm computers in these bays have RS-232 ports f
/archives//html/Amps/2005-09/msg00188.html (8,234 bytes)

253. Re: [Amps] Drying out HV transformers / Chokes (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sun, 18 Sep 2005 11:51:22 -0400
Dear Don, Do you live in a sunny area? Take the xfmr and put it in over a "parabolic" reflector made out of cardboard with tinfoil on it, focusing the sun's energy on the iron, which is sitting on so
/archives//html/Amps/2005-09/msg00211.html (9,431 bytes)

254. Re: [Amps] 3-500Z and ZG triodes (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Wed, 28 Sep 2005 17:25:51 -0400
2KW output on AM from a couple of 3-500Z's? On Wed, 28 Sep 2005 14:17:44 -0700 (PDT) Joe Isabella <n3ji@yahoo.com> writes: [ snip ] I've had them very bright orange on _______________________________
/archives//html/Amps/2005-09/msg00355.html (7,414 bytes)

255. Re: [Amps] Emtron DX3 problem (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Fri, 30 Sep 2005 12:29:35 -0400
Sirs, The DX-3 in my hotel room that I also tried out at a number of cell sites last year made a bunch of line noise in standby too. My Commander 2500E makes electrical noise and so does my '77Sx clo
/archives//html/Amps/2005-09/msg00384.html (8,576 bytes)

256. [Amps] 2006 Handbook (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sun, 9 Oct 2005 09:15:08 -0400
Gents, Does the 2006 Handbook contain errors? Importantly, do the errors occur in sections where a safety matter is affected? Hal Mandel W4HBM _______________________________________________ Amps mai
/archives//html/Amps/2005-10/msg00201.html (6,108 bytes)

257. Re: [Amps] 2006 ARRL Radio Handbook (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sun, 9 Oct 2005 12:03:18 -0400
In a preceding post the following phrase printed: "The Amateur is Loyal . . . . He owes his amateur radio to the American Radio Relay League and he offers it his unswerving loyalty." Is this quote co
/archives//html/Amps/2005-10/msg00207.html (8,859 bytes)

258. [Amps] Grounds and Grounding (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sat, 15 Oct 2005 11:17:16 -0400
In living through 41 years of hearing telephone engineers argue about proper Grounding one particular Method makes its way through: Single Point Grounding. Base Station Transmitter cellular tower sit
/archives//html/Amps/2005-10/msg00410.html (7,514 bytes)

259. Re: [Amps] Best RF-Ground Story (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Sat, 15 Oct 2005 11:38:30 -0400
[ snip ] [snip ] When living in Elmira, NY some thirty years ago our house was hit by lightning. The strike hit the overhead electrical lines and went through 150 feet of underground conduit before e
/archives//html/Amps/2005-10/msg00412.html (8,397 bytes)

260. Re: [Amps] AC wiring (score: 1)
Author: HAROLD B MANDEL <ka1xo@juno.com>
Date: Tue, 18 Oct 2005 11:59:12 -0400
Snortin' coke is one way of spending money. Rebuilding Alpha amplifiers is another. If the YL isn't a ham you can at least divide the lines in two. Either way, it's money spent. At least with Ham Rad
/archives//html/Amps/2005-10/msg00443.html (10,796 bytes)

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