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1. [AMPS] SB-220 input circuit (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Mon, 2 Aug 1999 19:30:09 -0600; On Mon, 02 Aug 1999 12:37:15 -0400 Pete Smith <n4zr@contesting.com> writes: There's some loss in the tuner in the 850, which at least partially cancels any additional power out of the solid state PA.; /archives//html/Amps/1999-08/msg00053.html (9,709 bytes)
2. [AMPS] Brightest Bottles (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Tue, 18 May 1999 22:13:08 -0600; The 250-TH's are pretty impressive. I remember when K1LPL inherited a bunch of single band amps from an OT. They each used a pair of 250-TH's, and glowed brightly idling with the key up, and then coo; /archives//html/Amps/1999-05/msg00232.html (8,170 bytes)
3. [AMPS] commercial plate choke (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Wed, 10 Mar 1999 22:05:25 -0700; Is there a place to buy a commercially-made plate choke that will cover the 10-160 meter amateur bands, including 18 and 24 Mhz WARC bands? Plate current 1.5 amps or more. If not, how exactly do I go; /archives//html/Amps/1999-03/msg00231.html (7,329 bytes)
4. [AMPS] re: commercial plate choke (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Fri, 12 Mar 1999 19:51:50 -0700; A few days ago I asked a question regarding availability of commercial plate chokes and how to test homebrew chokes. Recommendations for commercial units were mostly Ameritron and RF Parts. I ordered; /archives//html/Amps/1999-03/msg00268.html (8,381 bytes)
5. [AMPS] Re: commercial plate choke (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Sat, 13 Mar 1999 03:22:15 -0700; Well, let's see, a. I guess I didn't think of RF Parts as a surplus store. b. RFP has a nice inviting Web page, with a picture of the choke, electrical specifications and dimensions, all of which exa; /archives//html/Amps/1999-03/msg00274.html (8,322 bytes)
6. [AMPS] Chokes and Dipping chokes? (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Wed, 17 Mar 1999 19:49:07 -0700; Last week I made a posting requesting sources of commercial plate chokes, since my homemade choke had arced. I ended up ordering a unit from RF Parts. In the process of removing the old choke and ins; /archives//html/Amps/1999-03/msg00407.html (10,754 bytes)
7. [AMPS] High watt Zeners ! (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Sun, 21 Mar 1999 20:06:38 -0700; I guess everybody remembers the old trick of how to make a high power zener, right? You take a high power npn transistor and connect a low power zener from collector to base, with the banded end at t; /archives//html/Amps/1999-03/msg00553.html (7,526 bytes)
8. [Fwd: [AMPS] [Fwd: TL-922A power problem]] (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Mon, 22 Mar 1999 19:49:55 -0700; On Tue, 23 Mar 1999 02:01:39 -0500 lerxst <lerxst@columbus.rr.com> writes: Sounds like a thin insulating film has built up on the normally-closed contacts of the amp t-r relay. This is a very common; /archives//html/Amps/1999-03/msg00577.html (8,314 bytes)
9. [AMPS] HV Power Supply for 3-500Z (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Wed, 24 Feb 1999 08:19:42 -0700; On Thu, 25 Feb 1999 01:11:07 -0700 "Jerry L. Pyle" <jpyle@tctwest.net> writes: Someone told me a long time ago that these UTC transformers were unsuitable for full wave bridge use because the center; /archives//html/Amps/1999-02/msg00663.html (8,811 bytes)
10. [AMPS] T/R relay & TS850 (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Sat, 27 Feb 1999 08:23:35 -0700; On Sat, 27 Feb 1999 17:38:35 -0600 "Robert W5AJ " <w5robert@blkbox.com> writes: I've been doing that lately with my TS-850, using the 40 meter beam as a low-noise rx antenna on 80 and 160. No problem; /archives//html/Amps/1999-02/msg00695.html (7,360 bytes)
11. [AMPS] Telephone RFI Radio Shack Phones (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Tue, 8 Dec 1998 15:56:00 +0000; I've had good luck with the Radio Shack model 43-591. If it doesn't work, unplug all other phones, modems, answering machines, etc, in the house and try it again. If it still doesn't solve the proble; /archives//html/Amps/1998-12/msg00137.html (9,098 bytes)
12. [AMPS] Simple amps needed (score: 1): Author: k6ll@juno.com (k6ll@juno.com); Date: Tue, 24 Feb 1998 19:17:05 +0000; The 6E2L crew just finished an expedition to Baja California for the ARRL DX CW contest, and once again we ran into amplifier problems. We would like to obtain a couple of simple amplifiers, probably; /archives//html/Amps/1998-02/msg00136.html (7,842 bytes)
13. [AMPS] Conjugate match (score: 1): Author: k6ll@juno.com (David O. Hachadorian); Date: Wed, 03 Sep 1997 11:48:38 EDT; A power amplifier can be reduced to the Thevenin equivalent circuit of a voltage source with a series resistor source impedance. Power transfer is maximized when the load impedance is equal to the so; /archives//html/Amps/1997-09/msg00049.html (8,413 bytes)
14. [AMPS] SB-220 Rating (score: 1): Author: k6ll@juno.com (David O. Hachadorian); Date: Mon, 08 Sep 1997 13:25:43 EDT; Electronic Bias Switching is a wonderful mod to the SB-220. It takes a substantial load off the power supply in cw and ssb, and allows the entire amp to run cooler. The cw/ssb switch can then be conv; /archives//html/Amps/1997-09/msg00167.html (8,598 bytes)
15. [AMPS] AUTEK RF-1 (score: 1): Author: k6ll@juno.com (David O. Hachadorian); Date: Mon, 22 Sep 1997 11:26:26 EDT; On Tue, 23 Sep 1997 07:31:11 -0700 "Lane C. Zeitler" <km3g@cts.com> writes: The Autek measures Z, and, if you press the C or L button, it will solve the appropriate reactance equation for you. It doe; /archives//html/Amps/1997-09/msg00350.html (7,660 bytes)

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