Mail Archive Search: <+from:w2co@comcast.net>

Results:

References: [ +from:w2co@comcast.net: 34 ]

Total 34 documents matching your query.

21. Re: [Amps] titan 425 dimming, drop in power, hv (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Sun, 7 Jan 2018 15:26:05 -0700; Also in that case it would not achieve full power. Since you already re-capped it, if the problem persists try bringing it up without the tubes. This will rule out anything else including the rf deck; /archives//html/Amps/2018-01/msg00058.html (10,476 bytes)
22. Re: [Amps] Sad State of the Hobby (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Sat, 20 Jan 2018 15:42:18 -0700; Actually the 6o6o dxpedition to Somalia had the kpa500 and the 1000, the 500 died aprox. three days into the operation and they didn't even operate most of the day.. This speaks volumes about ss' cap; /archives//html/Amps/2018-01/msg00118.html (9,491 bytes)
23. Re: [Amps] AL80A PROBLEM (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Wed, 21 Nov 2018 10:06:01 -0700; Sounds like the amp is doing it's job, amplifying whatever shows up on its input. You mentioned seeing a slight bump in power from the exciter, there you go, the amp is merely amplifying what it sees; /archives//html/Amps/2018-11/msg00072.html (9,643 bytes)
24. [Amps] 9500 problem (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Mon, 26 Nov 2018 14:45:32 -0700; Jerry, I saw your post on the amps reflector and thought I would reply, I've been repairing the 9500's at Alpha since 09'. A couple of questions, if your antenna has swr of 1.2:1 already why are you; /archives//html/Amps/2018-11/msg00078.html (9,013 bytes)
25. Re: [Amps] New settings on Alpha 77SX (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Wed, 16 Jan 2019 10:01:03 -0700; One must increase load and repeak tuning to reduce grid I. Sent from my iPad Here's a new bit that happened last night. I was on 160 and discovered the grid became excessive as I was transmitting, I; /archives//html/Amps/2019-01/msg00079.html (9,259 bytes)
26. Re: [Amps] SB-220 flash over in power supply (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Sat, 14 Dec 2019 07:20:55 -0700; Use a grid dip meter and make sure the plate choke is not resonant in circuit with tubes in place on the freq. you want to operate on. Actually whenever you change the plate choke this should be done; /archives//html/Amps/2019-12/msg00024.html (9,126 bytes)
27. Re: [Amps] FT8 power with the KPA1500 (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Thu, 8 Jul 2021 14:31:44 -0600; Well if you read the ft8 manual, it suggested not running more than say 35 or 40w, this is (or was) a low power weak signal mode! With all you guys running legal limit it has become the channel 19 of; /archives//html/Amps/2021-07/msg00034.html (8,967 bytes)
28. Re: [Amps] TL-922A on 17 & 12 (score: 1): Author: Thomas <w2co@comcast.net>; Date: Tue, 12 Oct 2021 08:06:25 -0600; This tells me 100-200w are being sent back to the PS by a partially resonant choke, thus the "brown spots". You need to use an accurate grid dip meter with the choke in circuit to measure for any res; /archives//html/Amps/2021-10/msg00056.html (8,989 bytes)
29. Re: [Amps] TL-922A on 17 & 12 (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Wed, 13 Oct 2021 00:07:48 -0600; While it is true that the pi network and/or the input tuning may also be outside optimal tuning for that band, and both would cause reduced pwr out, mostly via high input swr. The pi tank on a 160-10; /archives//html/Amps/2021-10/msg00060.html (11,882 bytes)
30. Re: [Amps] Verify "Q" (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Fri, 15 Oct 2021 07:27:30 -0600; What I do is leave everything including the tube and even the plate choke in circuit but add a non inductive (carbon) resistor from the plate to ground, the resistor represents the plate impedance wh; /archives//html/Amps/2021-10/msg00066.html (10,792 bytes)
31. Re: [Amps] Verify "Q" (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Fri, 15 Oct 2021 07:50:08 -0600; PS don't forget to remove the resistor before power up! I did this and the result was a very loud bang like a firecracker went off inside the cabinet! Needless to say, the Resistor was gone! A.R.S. W; /archives//html/Amps/2021-10/msg00067.html (10,504 bytes)
32. Re: [Amps] FW: FW: Triode Amps / options / tetrodes (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Sat, 4 Dec 2021 05:44:24 -0700; For that matter, a 3cx5000A7 triode also has superb IMD characteristics and can run at full legal limit all day long with no need to come up with a regulated screen supply. Also no need for a socket; /archives//html/Amps/2021-12/msg00044.html (10,252 bytes)
33. Re: [Amps] Kenwood TL-922 Loading Cap Needed & AL82 Plate Tuning (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Tue, 12 Apr 2022 11:05:18 -0600; Could you possibly disassemble the cap assy and replace/repair only the damaged plates?? I just did this on a 9500, and that's what I plan on doing with the TL-922 if it ever goes.. More commonly it'; /archives//html/Amps/2022-04/msg00006.html (10,651 bytes)
34. Re: [Amps] 10 kw CCS on 6M..using the 3CX-6000A7...Part 5 (score: 1): Author: Thomas Walsh <w2co@comcast.net>; Date: Tue, 27 Sep 2022 17:15:33 -0600; And don't forget the L-Pi tank circuit, just adding a small L value from the plate to the blocking cap and of course before C1 will cancel out any excess Tube or input C. It will be taken up by the t; /archives//html/Amps/2022-09/msg00046.html (8,967 bytes)

Current List: 21 - 34
Page: [1] [2]