Mail Archive Search: <+from:w1nr@eecorp.com>

Results:

References: [ +from:w1nr@eecorp.com: 42 ]

Total 42 documents matching your query.

21. [AMPS] Wire size (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Thu, 03 Feb 2000 11:53:37 -0500; Use size 0 or 1 AL or Cu, preferably 0 for long duty cycles at a full 120A. That's an awful lot of current for a solid state amp. Most applications use 28V or preferably 50V transistors or modules fo; /archives//html/Amps/2000-02/msg00047.html (8,851 bytes)
22. [AMPS] Clipperton L - tubes (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Thu, 03 Feb 2000 13:47:19 -0500; No, they don't "HAVE" to be matched. Having a matched quad will distribute the current more evenly and probably extend the life of the tubes. I had a tube loose it's seal in one. They were RCA brand; /archives//html/Amps/2000-02/msg00054.html (7,864 bytes)
23. [AMPS] Economical amp with 160M (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Wed, 05 Jan 2000 22:18:28 -0500; I had a Dentron Clipperton-L that served me well when I owned it. Wish I hadn't sold it. Mike, W1NR -- ** Give Every Man His Dew ** Michael A. McCarthy, President Everest Engineering Corporation, Con; /archives//html/Amps/2000-01/msg00131.html (8,504 bytes)
24. [AMPS] PEP philosophy/rules (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Thu, 06 Jan 2000 19:38:40 -0500; I have never heard of anyone getting a citation out of the FCC for running a bit above the 1.5KW level. I do know of one who got writ up for running a 4CX10000 at 10KW out. I think the FCC even confi; /archives//html/Amps/2000-01/msg00168.html (7,796 bytes)
25. [AMPS] 4CX1000 (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Sun, 09 Jan 2000 21:09:22 -0500; I sent an e-mail to Eimac several weeks ago and got that one along with 4CX1500B, 8877 and 3CX1200D7 and Z7 free for the asking. Mike, W1NR -- ** Give Every Man His Dew ** Michael A. McCarthy, Presid; /archives//html/Amps/2000-01/msg00210.html (8,047 bytes)
26. [AMPS] RF Choke Forms (Epoxy) (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Sat, 15 Jan 2000 10:38:25 -0500; A related experience... DON'T use epoxy to hold an RF choke in place. In a 4-1000A linear, I used it to secure one to a ceramic cone type standoff. Put some inside the tube of the form at the base to; /archives//html/Amps/2000-01/msg00315.html (8,848 bytes)
27. [AMPS] SB-220 conundrum (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Tue, 18 Jan 2000 21:49:11 -0500; Pete, It is generally accepted that if max. power output does not co-incide with the plate current dip, you have a parasitic oscillation. Why such a subtle change causes it is anyone's guess. Mike, W; /archives//html/Amps/2000-01/msg00406.html (11,470 bytes)
28. [AMPS] Smallest practical 1.5KW 20uH coil (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Tue, 25 Jan 2000 17:46:43 -0500; I don't know if #25 is the number, but I'd also put 2 or 3 coats of G-C Polystyrene Q-dope on the tape as well. Mike, W1NR -- ** Give Every Man His Dew ** Michael A. McCarthy, President Everest Engin; /archives//html/Amps/2000-01/msg00525.html (12,120 bytes)
29. [AMPS] MRF150 (score: 1): Author: w1nr@eecorp.com (Michael McCarthy); Date: Wed, 8 Dec 1999 15:01:55 -0800 (PST); Hi Steve, First of all, semiconductor amps are VERY prone to failure without elaborate protection. The best advice is probably found in the engineering bulletins found or ordered on http://www.mot-sp; /archives//html/Amps/1999-12/msg00060.html (9,017 bytes)
30. [AMPS] Tetrode Amp Help (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Thu, 09 Dec 1999 00:41:44 -0500; Here are a couple of sources you may find at the library: Radio Handbook, 22nd Edition, 1981 page 22.52-22.61 has something that may be very close. It uses a directly grounded screen that floats the; /archives//html/Amps/1999-12/msg00062.html (12,049 bytes)
31. [AMPS] WTB: 3CX1500A7/8877 tubes (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Sat, 18 Dec 1999 00:16:26 -0500; Wanted: 2 Good 3CX1500A7/8877 NOS or full emission pulls. Send condition and asking price to mailto:w1nr@eecorp.com. Thanks and 73'es de Mike, W1NR -- ** Give Every Man His Dew ** Michael A. McCarthy; /archives//html/Amps/1999-12/msg00218.html (7,004 bytes)
32. [AMPS] alpha pa77 blower motor (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Sun, 19 Dec 1999 09:15:38 -0500; Hi Ed, How about taking a motor of similar size from another blower? Check out http://www.fairradio.com/ to see if they have one that is close enough in size. Another possibility is to contact a copi; /archives//html/Amps/1999-12/msg00232.html (9,286 bytes)
33. [AMPS] knock a 3-500z short loose..? (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Fri, 31 Dec 1999 17:20:08 -0500; Let me add a few comments: Find the side of the filament with the lowest resistance reading to the grid. That will give you the most direct path. Keep the tube upright when applying power. A car batt; /archives//html/Amps/1999-12/msg00442.html (11,357 bytes)
34. [AMPS] SB-220 G-G mods (score: 1): Author: w1nr@eecorp.com (Michael McCarthy, W1NR); Date: Tue, 30 Nov 1999 21:57:55 -0500; Well, at the start of the CQWW CW Contest, my SB-220 smoked. One of a near new set of Eimac 3-500Z's developed a grid-cathode short and smoked the grid bypass choke. After some research, it appears t; /archives//html/Amps/1999-11/msg00001.html (7,158 bytes)
35. RE: [Amps] Benefits of 3-phase power? (score: 1): Author: "Mike McCarthy, W1NR" <w1nr@eecorp.com>; Date: Wed, 19 Nov 2003 08:25:11 -0500; Here in Massachusetts, they do not allow 3-phase to come into a residential home. A buddy of mine got it into his barn, but only because it was detached from the house. You need to check your local c; /archives//html/Amps/2003-11/msg00271.html (8,106 bytes)
36. RE: [Amps] 220V service for amplifier (score: 1): Author: "Mike McCarthy, W1NR" <w1nr@eecorp.com>; Date: Wed, 3 Dec 2003 11:01:15 -0500; I agree with Bill. Most new installations require separate neutral and ground at the breaker box and for years, sub services had separate neutral and ground as well. Never consider neutral to be the; /archives//html/Amps/2003-12/msg00036.html (12,440 bytes)
37. RE: [Amps] 2 x 8877 (score: 1): Author: "Mike McCarthy, W1NR" <w1nr@eecorp.com>; Date: Sat, 28 Feb 2004 09:26:14 -0500; The Alpha SX had issues on 10M because of the capacitance of the two tubes. Also, 2x8877 is more expensive than 3x3cx800. With the 3cx800, the plate voltage is lower, required capacitance is lower, v; /archives//html/Amps/2004-02/msg00297.html (8,096 bytes)
38. RE: [Amps] 3CX1500D7 (score: 1): Author: "Mike McCarthy, W1NR" <w1nr@eecorp.com>; Date: Sat, 20 Mar 2004 09:35:11 -0500; Hmmm...The spec page seems to have been removed from the Eimac WEB site. It was there yesterday, but is not available today. Mike, W1NR http://www.cpii.com/eimac/catalog/172150.htm __________________; /archives//html/Amps/2004-03/msg00219.html (7,748 bytes)
39. [Amps] 3CX1500D7 (score: 1): Author: "Mike McCarthy, W1NR" <w1nr@eecorp.com>; Date: Sat, 20 Mar 2004 10:09:03 -0500; Hmmm...The spec page seems to have been removed from the Eimac WEB site. It was there yesterday, but is not available today. Mike, W1NR http://www.cpii.com/eimac/catalog/172150.htm __________________; /archives//html/Amps/2004-03/msg00220.html (7,627 bytes)
40. RE: [Amps] 3CX1500D7 (score: 1): Author: "Mike McCarthy, W1NR" <w1nr@eecorp.com>; Date: Mon, 22 Mar 2004 09:53:17 -0500; Unfortunately, the 3CX1200A Probably not. The 3CX1200A7 is filament and electrically compatible with the 3-1000Z, 4-1000A in GG and is used by Henry, Ameritron and many commercial applications. Mike; /archives//html/Amps/2004-03/msg00245.html (8,039 bytes)

Current List: 21 - 40
Page: [1] [2] [3]