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Total 29 documents matching your query.

1. [Amps] Starting up a NEW Henry amp (score: 1): Author: Carl Braun <Carl.Braun@cattron.com>; Date: Sat, 21 Oct 2023 20:48:45 +0000; I'm headed out tomorrow am on my way to save a Henry 3K Ultra amplifier. I'm in Wisconsin and the amp(s) is in Arizona. My buddy has gotten out of ham radio years ago and still has this Henry 3K Ultr; /archives//html/Amps/2023-10/msg00042.html (7,452 bytes)
2. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Carl Braun <Carl.Braun@cattron.com>; Date: Fri, 17 Nov 2023 17:00:49 +0000; I have some updates on the Henry amp(s) I picked up and thought some of you may find the results interesting. Maybe some of you can help with some of the issues that remain. I picked up Henry 3K Ultr; /archives//html/Amps/2023-11/msg00024.html (11,751 bytes)
3. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: <k1ttt.dave@gmail.com>; Date: Fri, 17 Nov 2023 14:35:14 -0500; Yes, most likely relays causing loss of rx signal. Another quick test to confirm relay dirt/corrosion is to leave the amp in standby and put 100w through the amp, this usually temporarily burns a bet; /archives//html/Amps/2023-11/msg00025.html (13,528 bytes)
4. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: "Dave Harmon" <k6xyzdave@gmail.com>; Date: Fri, 17 Nov 2023 13:45:18 -0600; Right..... I have a 3K Classic X MKll with probably the same relays. I had the same problem once and I just clicked the PTT a bunch of times to temporarily clean the contacts up. Sometime later I saw; /archives//html/Amps/2023-11/msg00026.html (13,895 bytes)
5. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Carl Braun <Carl.Braun@cattron.com>; Date: Tue, 5 Dec 2023 01:20:44 +0000; ...new updates on the Henry 3K Ultra amps as of 12/3/2023 The Henry 3K Ultra head SN 65-171 and its mate RF console 65-171 are working well now. I re-tapped the HV transformer and the Filament transf; /archives//html/Amps/2023-12/msg00000.html (13,742 bytes)
6. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: gudguyham--- via Amps <amps@contesting.com>; Date: Tue, 5 Dec 2023 10:50:14 +0000 (UTC); If all else fails the inputs are adjustable. What tube are these units running? Sent from the all new AOL app for iOS ...new updates on the Henry 3K Ultra amps as of 12/3/2023 The Henry 3K Ultra hea; /archives//html/Amps/2023-12/msg00001.html (15,348 bytes)
7. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: <john@kk9a.com>; Date: Wed, 6 Dec 2023 22:42:57 -0500; Are you saying that the Henry is causing RFI in your transceiver? Is this occurring with a dummy load or does you antenna feedline have CMC? John KK9A By enabling the tuner in the rig I can knock dow; /archives//html/Amps/2023-12/msg00005.html (7,538 bytes)
8. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Carl Braun <Carl.Braun@cattron.com>; Date: Mon, 11 Dec 2023 16:08:22 +0000; Hello John I am seeing high VSWR on my 7800 when using the Henry ULTRA amp. I don't hear or see RFI on my monitored signal but the VSWR meter is certainly responding differently to the Henry amp than; /archives//html/Amps/2023-12/msg00006.html (10,455 bytes)
9. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Victor Rosenthal <k2vco.vic@gmail.com>; Date: Mon, 11 Dec 2023 19:38:15 +0200; Carl, I understand that the SWR as shown on the meter in the transceiver is high when the amplifier is operating, but the SWR on the line to the antenna is normal. Is that correct? The Henry Ultra am; /archives//html/Amps/2023-12/msg00007.html (11,965 bytes)
10. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Carl Braun <Carl.Braun@cattron.com>; Date: Mon, 11 Dec 2023 17:47:51 +0000; Hello Victor I believe the adjustable coils are on the older Henry amps. No inductors like that on the 3K and 8K ultra two-piece amps Carl Get Outlook for iOS<https://aka.ms/o0ukef> _________________; /archives//html/Amps/2023-12/msg00008.html (14,329 bytes)
11. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Mon, 11 Dec 2023 12:53:07 -0500; The Henry Ultra amps have pi-network input circuits for each band. They have adjustable coils, L1-L6 on the schematic. If someone has misadjusted them, you can see high SWR. The 3K/8K Ultra does not; /archives//html/Amps/2023-12/msg00009.html (13,326 bytes)
12. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Carl Braun <Carl.Braun@cattron.com>; Date: Mon, 11 Dec 2023 18:10:02 +0000; Thanks Joe Any fix or mod for this? If not, I'll continue to use the rigs tuner to knock down the SWR to ensure I dont cause any damage to output transistors on the 7800 or other transceiver. [You do; /archives//html/Amps/2023-12/msg00010.html (14,841 bytes)
13. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: "dj7ww@t-online.de" <dj7ww@t-online.de>; Date: Mon, 11 Dec 2023 20:06:46 +0100 (CET); I don´t see any reason for damage to the output transistors. The typical input impedance of a 3CX3000A is around 50 ohms + a relatively small input capacitance. What Ultra is it? Henry build differen; /archives//html/Amps/2023-12/msg00011.html (16,676 bytes)
14. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: <garyschafer@largeriver.net>; Date: Mon, 11 Dec 2023 13:13:37 -0600; Do not use the radios internal auto tuner. Use an external MANUAL tuner and tune it when running maximum power. If you try to use the internal auto tuner it will not tune properly as it tunes up at l; /archives//html/Amps/2023-12/msg00012.html (16,420 bytes)
15. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Joe <nss@mwt.net>; Date: Mon, 11 Dec 2023 13:18:38 -0600; When doing this, unless this Tuner is placed between the T/R relay and the tube, it ends up being in the RF path on recv also. Isn't this going to make a bad load to the recvr of a good antenna? Joe; /archives//html/Amps/2023-12/msg00013.html (16,214 bytes)
16. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Victor Rosenthal <k2vco.vic@gmail.com>; Date: Mon, 11 Dec 2023 21:46:56 +0200; Oh, sorry, I was thinking of the 2k ultra. Have you tried a shorter cable between the transceiver and the amp? Victor 4X6GP _______________________________________________ Amps mailing list Amps@cont; /archives//html/Amps/2023-12/msg00014.html (15,648 bytes)
17. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Gary Schafer <garyschafer@largeriver.net>; Date: Mon, 11 Dec 2023 21:56:44 -0600; _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2023-12/msg00015.html (7,842 bytes)
18. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Rob Atkinson <ranchorobbo@gmail.com>; Date: Tue, 12 Dec 2023 05:27:36 -0600; Power level should not affect the impedance of a load. If it does, then something is wrong. A part may be heating up and changing value, in which case the matching network should be fixed. You shoul; /archives//html/Amps/2023-12/msg00016.html (8,458 bytes)
19. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: Alek Petkovic via Amps <amps@contesting.com>; Date: Wed, 13 Dec 2023 05:37:45 +0800; For what it's worth, I have had terrible problems getting the input matching right on several amplifiers using the VNA, yet when using normal drive levels, as reccommended in the user/service manuals; /archives//html/Amps/2023-12/msg00021.html (9,637 bytes)
20. Re: [Amps] Starting up a NEW Henry amp (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Tue, 12 Dec 2023 16:57:02 -0500; Of course! In any grounded grid amplifier the exciter sees both the input and output loading. Output tuning is highly influenced by the power level (maximum impedance at minimum plate current, ie, no; /archives//html/Amps/2023-12/msg00022.html (10,372 bytes)

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