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181. [Amps] MOV's (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 15 Mar 2002 13:43:44 -0800; advantages of bipolarity silicon transient voltage suppressors is that they can be built to fail as a short circuit, predictably and reliably. It's still a failure, but it's a more obvious one and t; /archives//html/Amps/2002-03/msg00357.html (12,821 bytes)
182. [AMPS] Alpha 374 bias (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 15 Mar 2002 14:24:45 -0800; "125ma?" Is this without keying the amplifier or applying RF drive? Or with keying the amp, and without RF drive? Or with both? Or what? ampere, it's impossible to read .125ma. Maybe you mean 125ma?; /archives//html/Amps/2002-03/msg00359.html (8,000 bytes)
183. [AMPS] Alpha 374 bias (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Fri, 15 Mar 2002 15:04:19 -0800; and in the operate position after the warmup is completed, but the amp is not keyed into the "transmit" mode. The other kind of idling, what I call "idling," is when the amp is on, in operate, and k; /archives//html/Amps/2002-03/msg00361.html (9,250 bytes)
184. [Amps] Henry 3K-A (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 18 Mar 2002 07:35:46 -0800; My experience with the 3K-A using a 240V line input is >>1500W A0 output on all bands with 100-120W drive. Never made any attempt to measure IMD, though... Your data indicated "1000+" output, but you; /archives//html/Amps/2002-03/msg00396.html (10,539 bytes)
185. [Amps] Henry 2k p.s. questions (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 18 Mar 2002 07:51:01 -0800; measure resistance) to check these...they use a lot of junctions in series and have too high a Vf (forward voltage drop) to be measured with a conventional VOM that only delivers a few volts to the; /archives//html/Amps/2002-03/msg00397.html (8,895 bytes)
186. [Amps] Henry 3K-A (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 18 Mar 2002 11:13:19 -0800; air back in the late 1970's it picked up 17dB over a 100W exciter and people would ask about that sometimes. I always attributed it to propagation changes. amps. Got tired of all the knob cranking (; /archives//html/Amps/2002-03/msg00404.html (9,233 bytes)
187. [Amps] Henry 3K-A (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 18 Mar 2002 14:55:53 -0800; Yeah, yeah...my 4K-U, purchased used in '78 or so, did not come with the Bird coupler or slugs...the center meter looked real cool but had nothing to drive it. I was only recently made aware that Hen; /archives//html/Amps/2002-03/msg00407.html (8,618 bytes)
188. [Amps] Tuned Input ? (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Wed, 20 Mar 2002 07:46:59 -0800; "silver mica" all use the same dielectric material, and "disc ceramic" do not -- there are many variants of ceramic capacitors and some behave badly with RF. I've found the cheapie but common Z5U, Y; /archives//html/Amps/2002-03/msg00438.html (8,939 bytes)
189. [Amps] Terminology Question (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Thu, 21 Mar 2002 08:11:43 -0800; Yep, the A battery was for the filaments, the B battery for the plates, the C battery for the grids, etc. I'm sure the "B+" designation relates back to the golden days of battery powered receivers. W; /archives//html/Amps/2002-03/msg00467.html (9,616 bytes)
190. [AMPS] 8877 Pinout (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 4 Feb 2002 14:33:09 -0800; Pins 1 & 5 are heater Pins 2, 3, 4, 6 & 7 are cathode. WB2WIK/6 "Each success only buys an admission ticket to a more difficult problem." -- Henry Kissinger -- FAQ on WWW: http://www.contesting.com/F; /archives//html/Amps/2002-02/msg00053.html (7,514 bytes)
191. [AMPS] Bird peak reading meter? Slightly off topic (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 11 Feb 2002 07:56:33 -0800; I have the 43P kit, and it does indeed work about as you indicate. Use an external power supply for it, though, the thing goes through 9v batteries (two at a time!) like water through a sieve. WB2WIK; /archives//html/Amps/2002-02/msg00083.html (9,283 bytes)
192. [AMPS] 1000H and 2500H Bird Slugs (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 11 Feb 2002 08:00:13 -0800; New prices available from Richardson Electronics, et al. WB2WIK/6 -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.; /archives//html/Amps/2002-02/msg00084.html (7,854 bytes)
193. [AMPS] Bird Meters (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 11 Feb 2002 08:01:35 -0800; They are available as spare parts from any authorized Bird distributor. As they are 30uA movements, I don't know of any "replacements" other than buying them from Bird. Richardson Electronics used t; /archives//html/Amps/2002-02/msg00085.html (7,734 bytes)
194. [AMPS] AL811h SCHEMATIC (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 11 Feb 2002 08:04:04 -0800; It's on page 9 of their manual, on line: http://www.ameritron.com/ameritron/man/pdf/AL-811H.pdf WB2WIK/6 "Each success only buys an admission ticket to a more difficult problem." -- Henry Kissinger -; /archives//html/Amps/2002-02/msg00086.html (7,467 bytes)
195. [AMPS] Bird peak reading meter? Slightly off topic (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 11 Feb 2002 09:45:32 -0800; W4AWI: You found the secret, obviously. But most of us, me included, don't switch wattmeters "on" and "off." In fact, I don't really switch anything on and off -- my gear is mostly on continuously, w; /archives//html/Amps/2002-02/msg00090.html (11,850 bytes)
196. [AMPS] Thanks for BIRD meter info! (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Mon, 11 Feb 2002 15:16:08 -0800; Don't forget that to measure VSWR, you need a slug for "reflected" reading that's several times more sensitive than the one used for "forward" power. If you're a Bird user, you already knew that...!; /archives//html/Amps/2002-02/msg00094.html (8,072 bytes)
197. [AMPS] Thanks for BIRD meter info! (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 12 Feb 2002 07:48:09 -0800; consider placing the short circuit directly at the amplifier output to realize the full benefit of this, thereby rendering the coax and antenna superfluous. By saving money on feedlines and beams, y; /archives//html/Amps/2002-02/msg00106.html (8,443 bytes)
198. [AMPS] mini Teflon coax, the white stuff (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 12 Feb 2002 07:54:06 -0800; (stranded conductor). The RG174-sized Teflon coax is RG178 or RG196, and the stuff that's a tad smaller than RG174 is RG188 or RG316. All are PTFE with silver-plated conductors. Don't use much of th; /archives//html/Amps/2002-02/msg00107.html (9,901 bytes)
199. [AMPS] Bird peak reading meter? Slightly off topic (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 12 Feb 2002 07:57:06 -0800; differential amplifiers circa 1970's. <There is active circuitry in the holdup amps.> -WB2WIK/6 -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requ; /archives//html/Amps/2002-02/msg00108.html (9,417 bytes)
200. [AMPS] Bird peak reading meter? Slightly off topic (score: 1): Author: stevek@jmr.com (Steve Katz); Date: Tue, 12 Feb 2002 08:23:38 -0800; the little leather handle straps on top?) and rarely sit in one place. Most of my measurements are "field" measurements, and no AC around...batteries are very nice. I don't leave a wattmeter in the; /archives//html/Amps/2002-02/msg00110.html (9,769 bytes)

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