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221. [Amps] Another L measurement of 2" Cu strap (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 5 Apr 2002 13:24:39 -0800; ? agreed perpendicular to he ? Well put. ? yea, verily. I use a Hertz antenna on 40m. Feed Z is a couple of k-ohms. I match it to 50-ohms with an L-network. cheers - R. L. Measures, a.k.a. Rich...,; /archives//html/Amps/2002-04/msg00192.html (8,184 bytes)
222. [Amps] SB-220 Transformer Problem (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 5 Apr 2002 13:58:41 -0800; ? Tnx. ? How much $ does he get for Caps and equalizer Res.? ? Yes. The transformer is history. ? I would order a 1200/800 Vrms secondary; dual 120V, 60Hz-only primarys on a core that will fit. Pott; /archives//html/Amps/2002-04/msg00193.html (11,218 bytes)
223. [Amps] Another L measurement of 2" Cu strap (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 5 Apr 2002 14:12:51 -0800; ? ... an end-fed [against gnd] dipole. The tuner is on the window sill. The wire goes out the louvered glass window and up at an angle. There is much V and little I at the window. I use an air-wound; /archives//html/Amps/2002-04/msg00195.html (8,279 bytes)
224. [Amps] SB-220 Transformer Problem (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 5 Apr 2002 14:19:25 -0800; More efficient use of the space for winding -- i.e., Heath's method of reducing HV by adding turns to the primaries required that thinner wire be used, which added R. - Mo' R is not mo' betta. cheer; /archives//html/Amps/2002-04/msg00196.html (8,286 bytes)
225. [Amps] SB-220 Transformer Problem (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 5 Apr 2002 19:12:38 -0800; about the ? is the PCB for the 8 electrolytics? sure whole ? But, wait: do you own a canoe that needs an anchor? E-I on ? Are they the Harbach suppressors with the 4-t suppressor inductors? as much; /archives//html/Amps/2002-04/msg00202.html (11,551 bytes)
226. [Amps] Re: [Amps] Re: [Amps] Re: [Amps] Re: [Amps ] Bird=c6 43 Ma nual (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Sat, 6 Apr 2002 07:57:55 -0800; ? True power is measured with a bomb-calorimeter. An NBS-traceable calibrated o'scope measurement of RF potential across a known, matched, termination comes in second -- and it takes <1% as much tim; /archives//html/Amps/2002-04/msg00214.html (7,727 bytes)
227. [Amps] tl-922 (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Sat, 6 Apr 2002 08:14:58 -0800; ? A ZSAC of 0.28A usually means that the 7.5v, 10w zener is shorted. This occasionally happens during the TL-922's intermittent parasitic-oscillations at c, 120MHz. The zener can be replaced with a; /archives//html/Amps/2002-04/msg00215.html (7,088 bytes)
228. [Amps] 4-400G (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 8 Apr 2002 12:26:16 -0700; I use two in a SB-220. They work well but they have a bit less vacuum than the metal-anode version. cheers, John - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2002-04/msg00245.html (7,198 bytes)
229. [Amps] 4-400G (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 8 Apr 2002 17:46:29 -0700; Leakage c. 10uA @ 8kV instead of c 5uA @ 8kV. The reason is that graphite tends to hide air molecules during pumping. ? UPS blue/air is a bit better than brown/ground. ? A friend bought a Triton 3-5; /archives//html/Amps/2002-04/msg00253.html (9,758 bytes)
230. [Amps] tuning tetrode amplifiers correctly (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 8 Apr 2002 18:12:43 -0700; ? With an adjustable output driver and with no anode or screen V: 1. Apply expected drive level and adjust the grid's variable inductor for zero reflected P. 2. Adjust grid-bias V for <0.05mA grid c; /archives//html/Amps/2002-04/msg00254.html (7,869 bytes)
231. [Amps] tuning tetrode amplifiers correctly (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Tue, 9 Apr 2002 02:59:40 -0700; /archives//html/Amps/2002-04/msg00257.html (6,904 bytes)
232. [Amps] SWR Measurements (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Wed, 10 Apr 2002 03:19:01 -0700; I used to work in metrology/calibration labs. Some of the microwave equipment we calibrated had test procedures that had an SWR spec. However, since SWR reading depends on the position of the SWR met; /archives//html/Amps/2002-04/msg00277.html (6,415 bytes)
233. [Amps] Single 8877's bias: maybe a stupid question.... (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Wed, 10 Apr 2002 08:14:05 -0700; ? The best bias V for the 8877 is that which produces the recommended ZSAC of 90 - 180 mA. In other words, it is not very critical. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com; /archives//html/Amps/2002-04/msg00285.html (7,475 bytes)
234. [Amps] WTB: Kaput 3cx800A7 (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Thu, 11 Apr 2002 05:27:41 -0700; Please state the amplifier from which it came and the price. tnx - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2002-04/msg00305.html (6,149 bytes)
235. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 12 Apr 2002 07:20:20 -0700; A few weeks ago I increased the supply potential to 16VDC because the 440 is rated at 12V to 16V. Some expressed doubt that 16V was safe. The radio still works and it is still producing less IMD. How; /archives//html/Amps/2002-04/msg00318.html (7,480 bytes)
236. [Amps] Motorola HV rectifiers (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Fri, 12 Apr 2002 15:26:16 -0700; ? Even with knowing the specs, I would still measure them with a high-pot to find the real piv. cheers, Conrad - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2002-04/msg00329.html (7,222 bytes)
237. [Amps] Interesting new amplifier manufacturer (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Sat, 13 Apr 2002 07:46:15 -0700; ? Methinks: The designer seemingly: 1. did not realize that a tuned input circuit is needed for g-g config. 2. did not take the mfg's recommendation for vertically mounting vacuum-caps. 3. did not e; /archives//html/Amps/2002-04/msg00340.html (7,249 bytes)
238. [Amps] Input impedance of grid circuit??? (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Sun, 14 Apr 2002 08:28:55 -0700; For SSB? cheers, Jim - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2002-04/msg00346.html (6,676 bytes)
239. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 04:02:53 -0700; ? I speak of what is often done on the air, Peter. - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K, www.vcnet.com/measures. end; /archives//html/Amps/2002-04/msg00354.html (7,942 bytes)
240. [Amps] TS-440S Update (score: 1): Author: 2@mail.vcnet.com (Richard); Date: Mon, 15 Apr 2002 04:23:45 -0700; Indeed. The surprisingly unique things about the TS-830S are that: it is exceedingly difficult to make dirty and the processor substantially improves copyability under weak signal conditions. Howeve; /archives//html/Amps/2002-04/msg00355.html (8,814 bytes)

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