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1. [Amps] Advice: harmonics from Alpha 91B on 160 (score: 1): Author: gds <gerys1@verizon.net>; Date: Sat, 30 Jan 2010 21:51:19 -0600 (CST); A friend of mine is using an Alpha 91B on 160 and is noticing harmonics around 5.595 MHz. (3rd order) Is this a problem that has been noticed with the 91B? Anyone know of a solution? Tks very much. G; /archives//html/Amps/2010-01/msg00547.html (6,732 bytes)
2. Re: [Amps] Advice: harmonics from Alpha 91B on 160 (score: 1): Author: "Hardy Landskov" <n7rt@cox.net>; Date: Sat, 30 Jan 2010 21:41:59 -0700; I had an Alpha 91B and I am sure it had some harmonic content but I never had a complaint. All amplifiers have harmonics and some more than others due to the exiter, design, and the phase relationshi; /archives//html/Amps/2010-01/msg00554.html (8,154 bytes)
3. Re: [Amps] Advice: harmonics from Alpha 91B on 160 (score: 1): Author: Robert Groh <rgroh@swbell.net>; Date: Sun, 31 Jan 2010 08:08:06 -0800 (PST); Oh, boy, all kinds of questions to ask here. First off - how is he detecting these harmonics? It would be very easy to overload the detecting device and have the harmonic being produced inside the de; /archives//html/Amps/2010-01/msg00574.html (9,364 bytes)
4. Re: [Amps] Advice: harmonics from Alpha 91B on 160 (score: 1): Author: Larry Benko <xxw0qe@comcast.net>; Date: Sun, 31 Jan 2010 09:44:10 -0700; FCC Part 97.307(d) "For transmitters installed after January 1, 2003, the mean power of any spurious emission from a station transmitter or external RF amplifier transmitting on a frequency below 30; /archives//html/Amps/2010-01/msg00578.html (11,192 bytes)
5. Re: [Amps] Advice: harmonics from Alpha 91B on 160 (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Sun, 31 Jan 2010 12:02:55 -0500; I suppose that 3rd order IM products could fall into the "spurious emissions" category. There isn't a ham transmitter on the market that would meet that. 73 Gary K4FMX _______________________________; /archives//html/Amps/2010-01/msg00580.html (12,931 bytes)

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