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21. [Amps] GS35B (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Thu, 25 Apr 2002 11:18:20 -0700; Good examples here, http://www.nd2x.net/base-1.html PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://wd7s.home.att.net; /archives//html/Amps/2002-04/msg00559.html (6,814 bytes)
22. [Amps] New amps (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Tue, 30 Apr 2002 15:31:42 -0700; Here are some nice looking new amps. http://www.danamps.com/ Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://wd7s.home.att.net; /archives//html/Amps/2002-04/msg00605.html (6,357 bytes)
23. [Amps] Fans for 4cx1000/1500 question (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Tue, 5 Mar 2002 15:57:35 -0800; - think that pressurizing the output tube like a 4CX250 or a 4CX1000 would Just as practical as it is on VHF and above, where it is the standard method. The only reason it isn't used so much on HF is; /archives//html/Amps/2002-03/msg00106.html (10,121 bytes)
24. [Amps] Source for 220V cords (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Thu, 7 Mar 2002 15:48:46 -0800; Electric codes are or have changed in most states now, requiring 4 wire plugs and receptacles for ranges and dryers in stick built homes and have been that way for mobile home dryers since the 1970'; /archives//html/Amps/2002-03/msg00148.html (9,126 bytes)
25. [Amps] Source for 220V cords (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Fri, 8 Mar 2002 11:40:04 -0800; A couple of missed points; The ground rod is no longer legal for most states in NEW construction. A UFER ground is now required, rebar embedded in the foundation wall or slab. Be sure to check with; /archives//html/Amps/2002-03/msg00185.html (15,470 bytes)
26. [Amps] Source for 220V cords (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Fri, 8 Mar 2002 11:40:46 -0800; A couple of missed points; The ground rod is no longer legal for most states in NEW construction. A UFER ground is now required, rebar embedded in the foundation wall or slab. Be sure to check with; /archives//html/Amps/2002-03/msg00186.html (15,350 bytes)
27. [Amps] Good Source for HV Probe? (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Tue, 26 Mar 2002 07:39:07 -0800; Start by looking at the manufacturer of your DMM as some probes are meter specific. Tektronix and Fluke both make them for their meters but they do not interchange, different scales. Paul PAUL HEWITT; /archives//html/Amps/2002-03/msg00598.html (8,280 bytes)
28. [Amps] Dayton fans (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Wed, 27 Mar 2002 07:42:57 -0800; I've been using the Kooltronics blowers for some time in various amps. I have a drawer full of Dayton blowers that are so far out of balance that they will walk themselves off the bench when running.; /archives//html/Amps/2002-03/msg00628.html (9,169 bytes)
29. [Amps] Swan Mark 1 (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Sun, 31 Mar 2002 09:35:18 -0800; Jim I think you have the 3-400 confused with the 3cx400a7. The 3-500's drop in the MK-1 but are too tall without plate cap or socket height changes. Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COM; /archives//html/Amps/2002-03/msg00705.html (7,556 bytes)
30. [AMPS] gs35 internals (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Sun, 17 Feb 2002 12:15:30 -0800; They both came right up Steve, nice pix. Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://wd7s.home.att.net If anyone is curious, I've posted a couple of pictures of the insides of a; /archives//html/Amps/2002-02/msg00178.html (7,447 bytes)
31. [AMPS] Copper Finger Stock Supplier (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Mon, 25 Feb 2002 10:31:49 -0800; Good selection at Surplus Sales of Nebraska and a limited amount at Fair Radio. Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://wd7s.home.att.net I'm builidng up some sockets for the; /archives//html/Amps/2002-02/msg00269.html (7,125 bytes)
32. [Amps] YC-156 Amp (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Thu, 28 Feb 2002 12:30:16 -0800; Finally fired up the YC-156 50mhz amp. For those interested, I've posted some specs and early test numbers in gallery-4 on my site. Warning!! Semi-Commercial website Paul PAUL HEWITT WD7S PRODUCTIONS; /archives//html/Amps/2002-02/msg00311.html (6,482 bytes)
33. [AMPS] Another Stupid Question (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Sun, 2 Dec 2001 17:53:26 -0600; a typical tube the plate C plate tune cap, the effect is to impedance (as seen by the Pi-Net input) need to be adjusted to maintain Not true. It sounds "nice", but it is not factual. In truth, the i; /archives//html/Amps/2001-12/msg00011.html (10,683 bytes)
34. [AMPS] Another Stupid Question (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Mon, 3 Dec 2001 06:40:05 -0600; cap half?? That would be true only if you broke the "rule" that the blocking cap reactance has to be small compared to the plate impedance of the tube. That would happen if the tube had low reactanc; /archives//html/Amps/2001-12/msg00021.html (8,875 bytes)
35. [AMPS] AL1500 (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Mon, 3 Dec 2001 16:59:50 -0600; No disrespect intended but the 8877 will also operate at less than 1500 watts. Typical operating parameters are just that, not rules, stay within the maximum values and everything is fine. Paul PAUL; /archives//html/Amps/2001-12/msg00056.html (10,154 bytes)
36. [AMPS] Display Lens (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Mon, 17 Dec 2001 13:08:27 -0600; Greetings For those that inquired about high power scales for the DS-1 bargraph display, they are finished and on the website. Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://wd7s.ho; /archives//html/Amps/2001-12/msg00302.html (6,479 bytes)
37. [AMPS] more about the input swamp circuit (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Mon, 12 Nov 2001 13:18:54 -0600; Skip I'm not sure which W6SAI handbook you're looking in but the twenty-third edition gives a input impedance value of 55 ohms for the 8874 with 26 watts of drive, pp15-18.It also gives a value of 54; /archives//html/Amps/2001-11/msg00206.html (7,813 bytes)
38. [AMPS] HV connectors (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Tue, 20 Nov 2001 08:35:15 -0600; It's fairly easy to remove the braid from rg-58 or rg-8 and slip it over 5mm silicone wire, still flexible and safer. Paul PAUL HEWITT WD7S PRODUCTIONS QRO HOMEBREW COMPONENTS http://wd7s.home.att.ne; /archives//html/Amps/2001-11/msg00378.html (9,472 bytes)
39. [AMPS] Millen HV Connectors Factory Pricing (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Tue, 20 Nov 2001 17:35:24 -0600; I hate to agree with Phil (HI HI) but I've also had several of the Millen connectors fail at 4200vdc. Mounted in oversize hole (sanded smooth) and nylon hardware. Big badda boom!! Stopped using them.; /archives//html/Amps/2001-11/msg00397.html (11,828 bytes)
40. [AMPS] YC-156 Input impedance (score: 1): Author: wd7s@att.net (PAUL HEWITT); Date: Tue, 2 Oct 2001 14:22:30 -0500; I am very curious how you arrived at that input impedance. As you know EVERY set of operating parameters results in a different drive impedance and the original question did not supply any operating; /archives//html/Amps/2001-10/msg00019.html (9,155 bytes)

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