Mail Archive Search: <+subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Drifting\s+Power\s*$/>

Results:

References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Drifting\s+Power\s*$/: 9 ]

Total 9 documents matching your query.

1. [Amps] Drifting Power (score: 1): Author: Steve London <n2icarrl@gmail.com>; Date: Sat, 16 Oct 2021 08:05:14 -0600; I have a Commander HF-2500 Magnum, with a pair of 3CPX800's. Great amp. It has one quirk, and only on 15 meters. If the amp has been dormant for a while, the output power is initially low: about 1100; /archives//html/Amps/2021-10/msg00068.html (7,441 bytes)
2. Re: [Amps] Drifting Power (score: 1): Author: Pete Smith N4ZR <pete.n4zr@gmail.com>; Date: Sat, 16 Oct 2021 10:32:16 -0400; FWIW, I see something very similar in my KPA-1500. I had assumed it was software protecting the transistors, just in case. 73, Pete N4ZR Check out the new Reverse Beacon Network web server at<http:/; /archives//html/Amps/2021-10/msg00069.html (7,917 bytes)
3. Re: [Amps] Drifting Power (score: 1): Author: Bruce Campbell <W8HW@comcast.net>; Date: Sat, 16 Oct 2021 11:10:14 -0400; I have noticed that many amplifiers are designed to be most efficient _NOT_ at room temperatures, but a bit above room temp. A good compromise in design. I have noticed this is both tube and solid st; /archives//html/Amps/2021-10/msg00070.html (9,676 bytes)
4. [Amps] Drifting Power (score: 1): Author: Steve Thompson <g8gsq72@gmail.com>; Date: Sat, 16 Oct 2021 16:35:37 +0100; Inductor in the output side warming up slightly and shifting value as it changes size? Is the output tuning sharp? Can you tweak the output tune/load so it gives full output immediately (and then may; /archives//html/Amps/2021-10/msg00071.html (7,654 bytes)
5. Re: [Amps] Drifting Power (score: 1): Author: MU 4CX250B <4cx250b@miamioh.edu>; Date: Sat, 16 Oct 2021 09:23:11 -0700; Im not aware of any vacuum tube RF power amplifiers that are sensitive to room temperature changes. However, if fixed load capacitors heat up under full RF power, a frequent occurrence, that can affe; /archives//html/Amps/2021-10/msg00072.html (10,592 bytes)
6. Re: [Amps] Drifting Power (score: 1): Author: Kim Elmore <cw_de_n5op@sbcglobal.net>; Date: Sat, 16 Oct 2021 16:38:28 -0500; Do you see this when using a dummy load, or your antenna, or both? Kim N5OP "People that make music together cannot be enemies, at least as long as the music lasts." -- Paul Hindemith _______________; /archives//html/Amps/2021-10/msg00073.html (11,603 bytes)
7. Re: [Amps] Drifting Power (score: 1): Author: Steve London <n2icarrl@gmail.com>; Date: Tue, 19 Oct 2021 07:22:41 -0600; Thanks to all for the many useful comments. To answer a few questions: 1) The input and output SWR remain constant while the power output is drifting. Using ArraySolutions PowerMaster wattmeters to v; /archives//html/Amps/2021-10/msg00075.html (10,829 bytes)
8. Re: [Amps] Drifting Power (score: 1): Author: Victor Rosenthal <k2vco.vic@gmail.com>; Date: Tue, 19 Oct 2021 19:26:06 +0300; The B&W 800 isn't suitable for 160m or for WARC bands. Victor 4X6GP _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/; /archives//html/Amps/2021-10/msg00076.html (12,048 bytes)
9. Re: [Amps] Drifting Power (score: 1): Author: Jim <jimw7ry@gmail.com>; Date: Tue, 19 Oct 2021 17:28:51 -0500; Replace the plate choke with an Ameritron/MFJ choke. RF parts also sells them, but they are quite a bit cheaper from Ameritron. 73 Jim W7RY Victor 4X6GP Thanks to all for the many useful comments. To; /archives//html/Amps/2021-10/msg00077.html (11,942 bytes)

Current List: 1 - 9
Page: [1]