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1. Re: [Amps] 3-500z - intermittent filament (score: 1): Author: n4zr@comcast.net; Date: Thu, 08 Feb 2007 16:05:17 +0000; I'm sure John is correct about both the risks of resoldering and the ideal solution, but what to do if you have tubes that have already failed from this cause? Using some of Rich Measures' silver sol; /archives//html/Amps/2007-02/msg00150.html (11,336 bytes)
2. Re: [Amps] special offer : 10 units amplifiers for sale (score: 1): Author: Pete Smith <n4zr@comcast.net>; Date: Sun, 22 Apr 2012 09:01:15 -0400; is there a web site where we can see these, Hsu? And did you mean 30 April? 73, Pete N4ZR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting; /archives//html/Amps/2012-04/msg00209.html (7,417 bytes)
3. [Amps] SB-220 input problem (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Sat, 8 Dec 2018 08:14:46 -0500; My SB-220 is showing a relatively high input SWR on 10M (about 2.5:1) - which I just discovered this weekend! Before I burrow into it, what's the most sensible approach? Acquire the capacitors for t; /archives//html/Amps/2018-12/msg00047.html (6,877 bytes)
4. [Amps] SB-220 low output on 10 was: SB-220 input problem (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Sun, 9 Dec 2018 17:04:04 -0500; I'll be ... I don't understand why, but putting 8-10 feet of RG-8X between the K3 and the amp brought the input SWR down to ~1.5:1. I'd love to know how come. Power output is still quite low (~600W; /archives//html/Amps/2018-12/msg00068.html (9,214 bytes)
5. [Amps] Need Meter Switch for SB-220 (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Sat, 5 Jan 2019 10:16:53 -0500; I recall being offered one a few years ago at Dayton, but don't remember who it was. Both the relative power and HV metering are gone, so a switch failure seems likely. After all,the amp is only 45; /archives//html/Amps/2019-01/msg00017.html (6,774 bytes)
6. Re: [Amps] SS Amps are expensive...why? (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Fri, 1 Feb 2019 17:27:25 -0500; Best check their reflector first - there seem to be a lot of expensive problems with immature firmware. 73, Pete N4ZR Check out the Reverse Beacon Network at <http://reversebeacon.net>, now spotting; /archives//html/Amps/2019-02/msg00002.html (14,288 bytes)
7. Re: [Amps] Remote control of Alpha 9500 (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Wed, 8 May 2019 14:51:37 -0400; I just googled rs-232 to rs-422 converters, and there are solutions available for as little as $30 (2 adapters) the maximum length is huge - thousands of feet. 73, Pete N4ZR Check out the Reverse Bea; /archives//html/Amps/2019-05/msg00014.html (8,050 bytes)
8. [Amps] Alpha on Life Support Again? (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Sat, 21 Dec 2019 09:50:25 -0500; Saw an ad on QRZ touting their "full time service department." I was curious about their prices, and went to their online store - every amp but the 9500 is "out of stock", and it is "backordered."; /archives//html/Amps/2019-12/msg00042.html (6,981 bytes)
9. Re: [Amps] W8ZR Autotune Amplifier Progress Report (score: 1): Author: N4ZR <n4zr@comcast.net>; Date: Wed, 23 Dec 2020 11:45:26 -0500; Please, no more parallel port stuff - that's so 1990's, and increasingly hard to find. Much better ways are available. N1MM, for example, puts a lot of relevant information out via UDP, and the OTR; /archives//html/Amps/2020-12/msg00058.html (17,133 bytes)

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