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References: [ +from:6146guy@gmail.com: 40 ]

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1. Re: [Amps] Plate hardware for Eimac tubes (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Mon, 5 Mar 2018 07:35:07 -0800
My Henry 3KA had Bristol screws in the pate connectors and all knobs. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinf
/archives//html/Amps/2018-03/msg00013.html (9,928 bytes)

2. Re: [Amps] Thread size for UHF connectors? (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Wed, 7 Mar 2018 09:50:25 -0800
Google says it is 5/8 x 24 _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2018-03/msg00022.html (8,627 bytes)

3. Re: [Amps] 47 Ohm 5 watt (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Thu, 9 Aug 2018 08:51:55 -0700
Antique Electronic Supply has new carbon composition resistors in stock. I have used many of them in building and repairing amplifiers such as the SB-220 and they work fine. Dave W7VM _______________
/archives//html/Amps/2018-08/msg00026.html (9,053 bytes)

4. Re: [Amps] Variac knob wanted, with 3/8 hole ! (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Sun, 30 Sep 2018 08:28:28 -0700
Fair Radio Sales has a nice Collins style fluted 23/8 diameter black know for a 3/8 inch shaft. Their part number is KNF-5. It is $7.50 Dave W7VM _______________________________________________ Amps
/archives//html/Amps/2018-10/msg00004.html (9,905 bytes)

5. Re: [Amps] Henry 3K-A choke failure...workaround? (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Thu, 26 Sep 2019 21:33:48 -0700
Thee years ago I was given a 3K-A with the same problem. I did put the choke on a piece of thick Bakelite and it worked great. I talked to several other hams that had done the same thing. However, I
/archives//html/Amps/2019-09/msg00075.html (11,734 bytes)

6. Re: [Amps] Henry 3K-A choke failure...workaround? (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Fri, 27 Sep 2019 12:51:04 -0700
Will placing choke in the ground return work with a swing choke input resonant choke supply like this? don't know the answer, just asking and may be remembering wrong about the supply configuration.
/archives//html/Amps/2019-09/msg00077.html (9,907 bytes)

7. Re: [Amps] re interfacing IC-706 to alpha 9500 (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Wed, 13 Nov 2019 16:32:39 -0800
It only matters if you are using cw qsk. If you are using vox control for cw or ssb or a ptt/foot switch the switching time already creates the delay. The voltage and current levels are fine. Dave W7
/archives//html/Amps/2019-11/msg00071.html (9,082 bytes)

8. Re: [Amps] SB220 running plate current when no drive; Problem (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Thu, 8 Oct 2020 08:38:26 -0700
For actual Eimac tubes the Eima DATA sheet shows much greater efficiency and usable power with 4000 volts on the plates. Henry made several amps with a 3200 or 4000- volt switch and the 3KA I had eas
/archives//html/Amps/2020-10/msg00019.html (9,511 bytes)

9. Re: [Amps] Switching between two amplifiers (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Sat, 3 Apr 2021 12:33:33 -0700
I went a different route. I made a simple patch panel. It was easy because I used bulkhead connectors for input, output, and relay so no soldering, just cables on each side. Relays are RCA, inputs ar
/archives//html/Amps/2021-04/msg00005.html (9,256 bytes)

10. Re: [Amps] 1N2637 (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Sat, 3 Apr 2021 20:43:51 -0700
Test between cap and pin 4 (one of the small pins). Google it, it is just a plain diode in a metal tube housing. Nothing special, no other components of ay kind, no resistors, no nothing. Schematic o
/archives//html/Amps/2021-04/msg00008.html (7,839 bytes)

11. Re: [Amps] W7RY Products (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Fri, 14 May 2021 08:27:24 -0700
Last January I put all his products in my SB-220. They work great and in my opinion are better engineered than the main competitor. He was very responsive to questions. The Mouser premade parts order
/archives//html/Amps/2021-05/msg00044.html (7,764 bytes)

12. Re: [Amps] HF 30 dB Coupler (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Mon, 14 Jun 2021 18:45:10 -0700
What Power Rating _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2021-06/msg00003.html (7,049 bytes)

13. Re: [Amps] Cleaning open frame TR relay (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Thu, 1 Jul 2021 16:37:14 -0700
I was taught decades ago by an old Tech (my Dad) to use a new crisp dollar bill saturated with 99.9% Isopropyl alcohol and if that didn't work a burnishing tool was the next step before replacement.
/archives//html/Amps/2021-07/msg00018.html (10,380 bytes)

14. Re: [Amps] 2K Classic X filament issue (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Tue, 3 Aug 2021 10:58:45 -0700
I had the same on my 2KD-3. Turned out the tube socket pins on one socket were a little dirty/corroded. Cleaned and tightened them and all is well now. Dave W7VM _____________________________________
/archives//html/Amps/2021-08/msg00001.html (9,112 bytes)

15. Re: [Amps] 2K Classic X filament issue (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Tue, 3 Aug 2021 13:43:36 -0700
Oops, you are correct. I must have been thinking of one of my past SB-220s. Being series makes it a real mystery. Dave W7VM _______________________________________________ Amps mailing list Amps@cont
/archives//html/Amps/2021-08/msg00003.html (10,717 bytes)

16. Re: [Amps] Testing Tubes with a Henry 2K (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Sat, 21 Aug 2021 19:40:39 -0700
The Henry 2K series amplifiers have the filaments in series so yuoust always have two tubes in the amp.. The manual explains why Henry made this choice. You can test a tube by having one known good t
/archives//html/Amps/2021-08/msg00058.html (8,092 bytes)

17. Re: [Amps] Testing Tubes with a Henry 2K (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Sun, 22 Aug 2021 09:33:14 -0700
Sorry, the 2K-2 on BAMA with 3-400Z tubes shows series filaments.. I don't have the original 2K manual and made an assumption. Dave W7VM _______________________________________________ Amps mailing l
/archives//html/Amps/2021-08/msg00065.html (11,001 bytes)

18. Re: [Amps] solid state amp ? (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Sat, 25 Sep 2021 19:09:14 -0700
My Ameritrom ALS-1306 has been faultless for three years now and has made many DX contacts on SSB and SSB. It is not glamorous but the price is right. If I really want to hit hard in a contest or pil
/archives//html/Amps/2021-09/msg00017.html (8,804 bytes)

19. Re: [Amps] Hole punches (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Sun, 10 Oct 2021 20:22:10 -0700
His punches were dull. I used them for years and never had a problem when using the properly _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contest
/archives//html/Amps/2021-10/msg00024.html (9,064 bytes)

20. Re: [Amps] MLA-2500 Tube Conversion (score: 1)
Author: David Gow <6146guy@gmail.com>
Date: Mon, 11 Oct 2021 17:57:52 -0700
If they are metric hex wrenches any good hardware or commercial fastening house will have them and so does Amazon.. Be sure they are to Bristol wrench. If they are also easy to on Amazon or many othe
/archives//html/Amps/2021-10/msg00045.html (10,112 bytes)

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