- 61. Re: [Amps] Pin Diodes (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Wed, 08 Mar 2006 07:04:36 -0600
- Paul, I think your experience with relay lifetimes is pretty typical of amps used on a regular basis in normal operation and is shared by many of us. But I suspect that if an amp is operated in a CW
- /archives//html/Amps/2006-03/msg00190.html (8,844 bytes)
- 62. Re: [Amps] Pin Diodes (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Wed, 08 Mar 2006 06:58:08 -0600
- Hi, Rob-- I, too, was disappointed to hear that the 9500 was going back to a vacuumrelay-based QSK system since I have been very happy with my Alpha 87As and have never had any problems with PIN diod
- /archives//html/Amps/2006-03/msg00191.html (12,627 bytes)
- 63. Re: [Amps] Pin Diodes (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Wed, 08 Mar 2006 09:34:02 -0600
- Hi, Paul-- I love how my 781s and 87As play together. On CW we can hear the back-scatter echoes and turn the antennas as appropriate. And even on SSB with PTT you can hear a slightly different "kerch
- /archives//html/Amps/2006-03/msg00200.html (11,828 bytes)
- 64. Re: [Amps] Threads - was idiocy - perhaps it still is (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Mon, 13 Mar 2006 23:35:49 -0600
- And my 1976 American Ford tractor has a British Lucas generator with two bearings. One bearing is metric and the other bearing (the two ends of the same shaft) is English-American-inches. Fortunatel
- /archives//html/Amps/2006-03/msg00353.html (7,318 bytes)
- 65. Re: [Amps] Kitchen Aid Silicone for Chimneys (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Fri, 14 Apr 2006 17:40:52 -0500
- Good tip. All Alpha amps use chimneys made from silicone rubber with generic RTV as the glue. The glue secret is to clamp the lap joint for 24 hours with some pretty decent pressure -- like a pair of
- /archives//html/Amps/2006-04/msg00267.html (8,553 bytes)
- 66. [Amps] Low ESR caps for amp power supplies (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Sun, 30 Apr 2006 08:24:52 -0500
- I am about to build a half-dozen power supplies for assorted amps for 160M and the VHF bands. With a need for approximately 60 electrolytic caps for the 6 power supplies it is imperative that I find
- /archives//html/Amps/2006-04/msg00438.html (7,161 bytes)
- 67. Re: [Amps] Low ESR caps for amp power supplies (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Tue, 02 May 2006 16:40:39 -0500
- Follow up to my original posting on filter caps. Right in the midst of all of this I am getting an unplanned visitor so my apologies for the slow response. Need to get this place looking civilized! I
- /archives//html/Amps/2006-05/msg00003.html (8,504 bytes)
- 68. Re: [Amps] Alum electrolytic caps TSPA (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Tue, 02 May 2006 16:42:35 -0500
- This is the best news I have heard. If you run across his name or eBay info please let me know. And keep it QUIET on the amps reflector! ;-) 73--John W0UN ____________________________________________
- /archives//html/Amps/2006-05/msg00004.html (7,708 bytes)
- 69. Re: [Amps] RE : who needs it? Henry 8K (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Tue, 23 May 2006 14:38:24 -0500
- Rich-- This sounds like a cheap shot to me. I have been contesting since 1959 and have operated at many multi-multi stations as well as some single-op stations and I have yet to see any CONTEST stati
- /archives//html/Amps/2006-05/msg00292.html (9,678 bytes)
- 70. Re: [Amps] RE : who needs it? Henry 8K (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Wed, 24 May 2006 08:08:39 -0500
- Rich-- I am not saying it didn't happen. What I AM saying is that your comment makes it sound like contesters running tubes with handles is rampant among the contest fraternity. And what I am saying
- /archives//html/Amps/2006-05/msg00316.html (11,183 bytes)
- 71. [Amps] Need help locating an article (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Fri, 06 Jul 2007 02:14:41 -0500
- I have looked in the amps reflector as well as in the ARRL index for QST and QEX and I have been unable to locate an article that I would like to read again. This is especially frustrating since I ma
- /archives//html/Amps/2007-07/msg00041.html (7,731 bytes)
- 72. [Amps] Need help locating an article -- followup (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Fri, 06 Jul 2007 12:23:43 -0500
- Thanks for the on-line as well as the off-line input and offers to help. Looks like there are three articles of interest for AC Mains regulated HV power supplies in the following issues. Jul/Aug 1999
- /archives//html/Amps/2007-07/msg00052.html (7,320 bytes)
- 73. [Amps] Need help locating an article -- correction (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Fri, 06 Jul 2007 15:09:14 -0500
- Looks like the article I am looking for is in the MAY 1987 issue of QST and not in the July issue as I previously mentioned. I have someone who has volunteered to send it to me. Hopefully this evenin
- /archives//html/Amps/2007-07/msg00054.html (6,678 bytes)
- 74. Re: [Amps] Jennings and Kilovac vacuum relays for sale (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Sat, 07 Jul 2007 18:57:03 -0500
- I'd be a little concerned since the Gigavac GH1 appears to be rated for MUCH less RF current based on my reading of their web page compared to the equivalent Kilovac and Jennings units. http://www.gi
- /archives//html/Amps/2007-07/msg00077.html (9,021 bytes)
- 75. Re: [Amps] Jennings and Kilovac vacuum relays for sale (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Sat, 07 Jul 2007 21:10:50 -0500
- Arne/Bob-- Well, I DID look very closely and since the operating voltage is high-lighted in YELLOW and only ONE of the ratings is high-lighted in yellow then I would have to believe that the other co
- /archives//html/Amps/2007-07/msg00080.html (9,976 bytes)
- 76. Re: [Amps] Henry 2003 Filter for 20002A Amp (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Tue, 10 Jul 2007 09:10:05 -0500
- If you need to replace the Henry 3002 filter here is a good article on a harmonic filter design with reference to the original article. 'Stub Filters Revisited' by John Regnault, G4SWX, Radio Communi
- /archives//html/Amps/2007-07/msg00144.html (7,935 bytes)
- 77. Re: [Amps] Henry 2003 Filter for 20002A Amp (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Tue, 10 Jul 2007 09:57:29 -0500
- I do a lot of stub filtering for my VHF radars when I need to reduce the 2nd and 3rd harmonics. They are pretty high Q an do a good job. But the designs that John did are much more interesting in tha
- /archives//html/Amps/2007-07/msg00151.html (8,563 bytes)
- 78. Re: [Amps] 200w fast relay >> amp relays/ant switches (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Tue, 10 Jul 2007 14:00:30 -0500
- I would love to see a similar discussion (my apology if has already happened and is in the archives) for hi-rel antenna relays in the 2 KW + range. Not that I plan QRO but I like to build in very hig
- /archives//html/Amps/2007-07/msg00169.html (7,889 bytes)
- 79. Re: [Amps] ALPHAs and momentary power outages (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Wed, 18 Jul 2007 11:39:23 -0500
- And, pray tell, just exactly WHY would Alpha want to give you the code to defeat the timer? Maybe to increase their revenues from increased service work, or from increased replacement tube sales? --
- /archives//html/Amps/2007-07/msg00325.html (9,211 bytes)
- 80. Re: [Amps] higher v.?? (score: 1)
- Author: W0UN -- John Brosnahan <shr@swtexas.net>
- Date: Tue, 24 Jul 2007 19:47:55 -0500
- You pay a fair amount more up-front for the CFL bulbs and I have seen nowhere near the lifetime they are claiming. They blow around here all of the time and I would be surprised if I was getting a ye
- /archives//html/Amps/2007-07/msg00414.html (8,470 bytes)
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