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1. [Amps] Neutral vs Ground Connection for 220 VAC (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Wed, 11 Dec 2002 19:43:44 -0800; Hi All, Our club just inherited a Henry 2K-D which I was planning to wire for the 220VAC service that we have available in the shack. My quandry is how to properly connect the 4 wire 220VAC wiring on; /archives//html/Amps/2002-12/msg00167.html (8,373 bytes)
2. [Amps] Neutral vs Ground Connection for 220 VAC (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Sat, 14 Dec 2002 18:55:22 -0800; Thanks to all who replied on this one. Lots of good suggestions. I'll have to check the subpanel (yes their is a subpanel) to see how everything is wired and then go from there (based on the schemati; /archives//html/Amps/2002-12/msg00196.html (9,640 bytes)
3. [Amps] K8CPA (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Tue, 24 Dec 2002 14:18:59 -0800; Yes, Mark, I believe you are correct. The first time I read Chuck's comment I interpreted it as a personal attack towards Bob W2WG. Upon second reading, however, I figured out what he was trying to s; /archives//html/Amps/2002-12/msg00282.html (10,466 bytes)
4. [Amps] K8CPA (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Wed, 25 Dec 2002 11:44:23 -0800; I have an old Ten-Tec Paragon here, Bill. The noise blanking is done in the first IF ahead of all the narrow second IF filters and is extremely effective on impulse noise provided that the band is no; /archives//html/Amps/2002-12/msg00293.html (9,616 bytes)
5. [Amps] 2 x 8877 amp (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Wed, 6 Nov 2002 12:11:36 -0800; If you could get the efficiency up to 70%, then you might be able to squeeze out 10000W peaks if you had a 14 KW ICS power supply (3300 Volts x 4.3 amps peak). With a two-tone signal x 70% efficiency; /archives//html/Amps/2002-11/msg00066.html (9,837 bytes)
6. [Amps] Glitch resistors -- replacing RF choke in SB-220 (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Sun, 1 Sep 2002 10:01:41 -0700; That would make sense that it would fail on the lowest band, Pete. On 80M, the main choke has the least reactance, and likewise the shunt bypass C between the two chokes has the most reactance. The e; /archives//html/Amps/2002-09/msg00005.html (8,458 bytes)
7. [Amps] recommendations please (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Sun, 18 Aug 2002 16:18:31 -0700; Sounds like you might want to go with some kind of electronic bias control scheme, Larry. (G3SEK probably has a circuit for this on his website). This would cut the tube bias off during standby, thus; /archives//html/Amps/2002-08/msg00157.html (9,588 bytes)
8. [Amps] 3-500Z parasitic wows (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Fri, 23 Aug 2002 07:35:59 -0700; I can't comment on the other things you mentioned, Rich (lack of experience), but your reasoning seems poor here. The arc you mention has a point of origination, and a point of termination. Both of; /archives//html/Amps/2002-08/msg00221.html (8,651 bytes)
9. [Amps] rocky point effect, barnacle bill (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Sat, 24 Aug 2002 22:19:13 -0700; I don't know, Rich. Tom, told me on this very forum that Ameritron sized their glitch resistors based on service history. I have some glitch resistors in my shop that Tom recommended (I believe they; /archives//html/Amps/2002-08/msg00260.html (12,210 bytes)
10. [Amps] Muffin Fan on Swan Mark 1 (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Sun, 28 Jul 2002 06:42:28 -0700; Someone at work designed a 240 GHz corrugated horn for me using internally developed EM computer codes. The dimensions were sent to a local vendor who direct machined the corrugations using a CNC lat; /archives//html/Amps/2002-07/msg00513.html (10,785 bytes)
11. [Amps] Rectifier diode strings (score: 1): Author: W4EF@dellroy.com (Mike); Date: Mon, 6 May 2002 20:31:31 -0700; Yes, that is what I thought also, Jeff. If the flux density doesn't increase under load, then how is energy transferred from primary to secondary? Mike, W4EF.....................; /archives//html/Amps/2002-05/msg00057.html (10,714 bytes)
12. [Amps] Basic transformer theory (score: 1): Author: W4EF@dellroy.com (Mike); Date: Tue, 7 May 2002 21:57:28 -0700; Thanks for clearing that up, Eric. I have been saturated with work, and my personal life has been in flux, so I was reluctant to pull out my electromagnetics textbook in order to get to the core of t; /archives//html/Amps/2002-05/msg00073.html (9,745 bytes)
13. [Amps] Ameritron AL82 @ 17 meters (score: 1): Author: W4EF@dellroy.com (Mike); Date: Fri, 10 May 2002 23:55:47 -0700; Sounds like a neat trick, Tom, but I am not quite clear on the connection between the light bulb and the T connector. Is the lightbulb connected between one leg of the T connector and chassis ground; /archives//html/Amps/2002-05/msg00124.html (10,708 bytes)
14. [Amps] power combining? (score: 1): Author: W4EF@dellroy.com (Mike); Date: Sun, 12 May 2002 13:12:33 -0700; Jim, High level combining is very commonly done with solid-state power amplifier modules. If you search the app-note archives on the On Semiconductor website, you can find copies of the old Motorola; /archives//html/Amps/2002-05/msg00141.html (8,838 bytes)
15. [Amps] Ameritron AL82 @ 17 meters (score: 1): Author: W4EF@dellroy.com (Mike); Date: Mon, 13 May 2002 13:04:32 -0700; I don't have a dip meter, Rich :); /archives//html/Amps/2002-05/msg00179.html (11,898 bytes)
16. [Amps] al-1500 parasitic?? or some other problem? (score: 1): Author: W4EF@dellroy.com (Mike); Date: Mon, 13 May 2002 21:25:59 -0700; Its sounds like the amp is marginally stable, and the input signal is pumping the oscillation. I have seen this kind of behavior in a marginally stable solid state IF amplifier strip that one of our; /archives//html/Amps/2002-05/msg00190.html (14,653 bytes)
17. [Amps] al-1500 parasitic?? or some other problem? (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Tue, 14 May 2002 17:06:40 -0700; Dave, When you said "with and without" the ICE bandpass filter, did you take it completely out of circuit for the "without" portion or just switch it to the bypass mode. The LEDS on the ICE front pan; /archives//html/Amps/2002-05/msg00206.html (17,437 bytes)
18. [Amps] al-1500 parasitic?? or some other problem? (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Fri, 17 May 2002 21:22:51 -0700; Tom, I thought Dave said that the 21 MHz spurious signal tracked his fundamental and held a 3F/2 relationship with it all the way across the 20 meter band. I don't see how a the 14 MHz fundamental be; /archives//html/Amps/2002-05/msg00286.html (12,321 bytes)
19. [Amps] al-1500 parasitic?? or some other problem? (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Sat, 18 May 2002 09:04:57 -0700; The following is a link to an IEEE paper that I found this morning which talks about (and references) analog frequency dividers. Apparently the application is high frequency (microwave) low power sys; /archives//html/Amps/2002-05/msg00292.html (10,389 bytes)
20. [Amps] al-1500 parasitic?? or some other problem? (score: 1): Author: W4EF@dellroy.com (Michael Tope); Date: Sat, 18 May 2002 14:56:38 -0700; The following is a link to an IEEE paper that I found this morning which talks about (and references) analog frequency dividers. Apparently the application is high frequency (microwave) low power sys; /archives//html/Amps/2002-05/msg00296.html (10,239 bytes)

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