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1. Re: [Amps] Tucker / Vectronics 2500W fan cooled dummy load for sale (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Mon, 27 Jul 2009 17:08:14 -0700; SOLD _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2009-07/msg00344.html (7,716 bytes)
2. [Amps] Tucker / Vectronics 2500W fan cooled dummy load for sale (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Mon, 27 Jul 2009 15:53:27 -0700; I have a like new Tucker 2500W fan cooled 50 Ohm SO239 dummy load for sale. It is in near perfect condition and rated for 1.8 to 150MHz. Full power can be tested for 60sec with the fan running and ro; /archives//html/Amps/2009-07/msg00342.html (6,666 bytes)
3. [Amps] Huge discounts now on remaining GS35b Amp project parts (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Sat, 25 Jul 2009 13:50:03 -0700; All, I need to clear this project out to make room for another so, as they say, my loss is your gain! Check out my revised spreadsheet with new pricing. https://spreadsheets.google.com/ccc?key=0AkCGE; /archives//html/Amps/2009-07/msg00334.html (6,919 bytes)
4. [Amps] Like new blowers for QRO (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Fri, 24 Jul 2009 12:07:28 -0700; All, In anticipation of an international order which did not materialize, I have these two large 220V blowers each disassembled and packed in USPS Priority Mail flat rate boxes and almost ready to sh; /archives//html/Amps/2009-07/msg00328.html (7,553 bytes)
5. [Amps] GS35b and lots of amp building parts available (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Tue, 30 Jun 2009 21:26:51 -0700; All, I have a fair amount of parts left from GS35b projects available. The link for the inventory is: http://spreadsheets.google.com/ccc?key=pgAd1PO-wiqDBz0lSssZgPw The image link is: http://picasawe; /archives//html/Amps/2009-06/msg00151.html (6,749 bytes)
6. [Amps] still some great amp building parts left @ KD7QAE (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Wed, 17 Jun 2009 18:27:50 -0700; All, I have a fair amount of parts left from GS35b projects available. The link for the inventory is: http://spreadsheets.google.com/ccc?key=pgAd1PO-wiqDBz0lSssZgPw The image link is: http://picasawe; /archives//html/Amps/2009-06/msg00077.html (6,845 bytes)
7. Re: [Amps] Source wanted for HV switch-mode power supply (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Wed, 20 May 2009 13:01:21 -0700; Paul, Once you get it working, it would be straight forward to lay out a few PC boards so others could do what amounts to a kit build. I would suggest a primary module with a separate PWM controller; /archives//html/Amps/2009-05/msg00136.html (10,536 bytes)
8. [Amps] GS35b amp construction parts (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Sat, 16 May 2009 08:11:16 -0700; All, I have a fair amount of parts left from GS35b projects available. The link for the inventory is: http://spreadsheets.google.com/ccc?key=pgAd1PO-wiqDBz0lSssZgPw The image link is: http://picasawe; /archives//html/Amps/2009-05/msg00089.html (7,035 bytes)
9. Re: [Amps] winding an HV transformer (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Wed, 01 Apr 2009 08:06:12 -0700; Paul, At the output of your 1:n transformer (non CT), you will get nVp-2Vf peak voltage measured across the FWB + and - terminals. Since Vp = Vave for the square wave, the DC output will be nVp-2Vf a; /archives//html/Amps/2009-04/msg00005.html (10,179 bytes)
10. Re: [Amps] winding an HV transformer (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Tue, 31 Mar 2009 22:33:47 -0700; Paul, At a 6:1 ratio, assuming the core are supports the flux created by 340V and 6 turns, you will have an output of 6x340 or 2040V. The transformer takes the 680Vp-p primary square wave and deliver; /archives//html/Amps/2009-03/msg00564.html (10,785 bytes)
11. Re: [Amps] GS35b housecleaning continues (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Sat, 07 Mar 2009 08:42:23 -0800; Still have LOTs of great amp building stuff left! See the updated photos and price list in the following links. http://picasaweb.google.com/taldridge/AmpParts?authkey=Gv1sRgCM3s-Y23loKI6AE&feat=direc; /archives//html/Amps/2009-03/msg00232.html (8,382 bytes)
12. [Amps] GS35b housecleaning continues (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Wed, 04 Mar 2009 10:28:53 -0800; Thanks to all who have viewed and bought some of my excess GS35b amp building material. There is still a complete set of parts for a single GS35b RF deck, including heater power supply, cooling and e; /archives//html/Amps/2009-03/msg00116.html (6,899 bytes)
13. Re: [Amps] GI7B Max Plate and Grid Current?? (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Mon, 02 Mar 2009 10:56:25 -0800; From the curves, it looks like Igmax is about 0.5A under normal operation and biasing so a .75A meter face would work well. Max grid power dissipation is 26W on this tube. The curves are on http://am; /archives//html/Amps/2009-03/msg00064.html (8,235 bytes)
14. Re: [Amps] house cleaning AMP parts for sale (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Sat, 28 Feb 2009 14:07:38 -0800; Here is the inventory list with prices: http://spreadsheets.google.com/ccc?key=pgAd1PO-wiqDBz0lSssZgPw _______________________________________________ Amps mailing list Amps@contesting.com http://lis; /archives//html/Amps/2009-02/msg00742.html (9,694 bytes)
15. Re: [Amps] house cleaning AMP parts for sale (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Sat, 28 Feb 2009 13:58:51 -0800; All, I have sold the Alpha77s transformer and the WD7S Bias Control board. All the rest is still available, including the GS35b tubes and custom mounts, PS parts, RF deck parts and tuned input parts.; /archives//html/Amps/2009-02/msg00741.html (8,991 bytes)
16. [Amps] house cleaning AMP parts for sale (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Fri, 06 Feb 2009 17:57:37 -0800; I have a very complete set of parts for a single or dual GS35 amplifier which need a new home. 4kV Power supply including HV rectifier and metering PCB built and tested & Power transformer, high qual; /archives//html/Amps/2009-02/msg00164.html (7,079 bytes)
17. Re: [Amps] High Temp Silicon Rubber -- Where to buy? (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Sun, 12 Nov 2006 00:43:34 +0000; I suggest the silicone baking sheets found in any good cookware department. They are thin and fiberglass reinforced. Tomm, KD7QAE _______________________________________________ Amps mailing list Amp; /archives//html/Amps/2006-11/msg00152.html (8,550 bytes)
18. [Amps] another Cu foil source (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Tue, 13 Jun 2006 07:05:39 +0100; This place sells to the stained glass hobby: http://www.glassmart.com/regular_foil.asp 1.5mil (.0015") thick foil tapes and sheets are available. I bought some "slug barrier <http://www.greenfeet.com; /archives//html/Amps/2006-06/msg00271.html (6,804 bytes)
19. Re: [Amps] Low ESR caps for amp power supplies (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Sun, 30 Apr 2006 19:15:27 +0100; John, I don't believe the issue was with the HV Al EL caps used in our application but rather in the low ESR, LV parts used on the output of motherboard voltage regulators. That said, it is good to b; /archives//html/Amps/2006-04/msg00440.html (9,070 bytes)
20. Re: [Amps] Plate Impedance, ARRL (score: 1): Author: KD7QAE <KD7QAE@ARRL.NET>; Date: Thu, 27 Apr 2006 02:03:34 +0100; All, I now find teh web as my primary reference for ham radio and not the handbooks. I do have a copy of the handbook in the shop and at the operating position but have gotten far more benefit while; /archives//html/Amps/2006-04/msg00394.html (11,806 bytes)

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