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Total 7 documents matching your query.

1. [Amps] Non-linear linear (score: 1): Author: Paul Baldock <paul@paulbaldock.com>; Date: Thu, 30 Jan 2014 16:42:50 -0800; I have a problem with my home brew HF linear being non linear on one band. On 80, 40, 20, 12 and 10 with 75W drive my linear will give about 1500W output. If I reduce the input power by 9.5dB the out; /archives//html/Amps/2014-01/msg00327.html (8,110 bytes)
2. Re: [Amps] Non-linear linear (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Thu, 30 Jan 2014 20:51:52 -0800; Can u hear any increased imd, off freq.... on another RX... or a spectrum analyzer ? Does the idle current remain constant on all bands ? Something is amiss that is causing non linearity. It appears; /archives//html/Amps/2014-01/msg00330.html (9,122 bytes)
3. Re: [Amps] Non-linear linear (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Fri, 31 Jan 2014 18:59:05 +0000; Turn on the amplifier and observe plate current. Increase drive slowly and watch the plate current. If it jumps during this process, you may have a parasitic oscillation. Sometimes amplifiers can hav; /archives//html/Amps/2014-01/msg00348.html (10,828 bytes)
4. Re: [Amps] Non-linear linear (score: 1): Author: Manfred Mornhinweg <manfred@ludens.cl>; Date: Fri, 31 Jan 2014 18:57:58 +0000; Paul, your problem sounds, looks, smells, tastes and feels like a self-oscillation happening only when the bandswitch is in the 15/17m positions. So I guess it actually IS a self-oscillation! ;-) Sha; /archives//html/Amps/2014-01/msg00349.html (9,302 bytes)
5. Re: [Amps] Non-linear linear (score: 1): Author: Paul Baldock <paul@paulbaldock.com>; Date: Fri, 31 Jan 2014 11:51:36 -0800; Well ignore everything I said. It's a measurement error. I was assuming the input SWR was relatively constant with power levels and basing my input power variation on a voltage measurement on the sco; /archives//html/Amps/2014-01/msg00350.html (9,496 bytes)
6. [Amps] Non-linear linear (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Sat, 1 Feb 2014 06:21:47 -0800; Well ignore everything I said. It's a measurement error. I was assuming the input SWR was relatively constant with power levels and basing my input power variation on a voltage measurement on the sco; /archives//html/Amps/2014-02/msg00001.html (9,080 bytes)
7. Re: [Amps] Non-linear linear (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 01 Feb 2014 09:38:00 -0500; output share the same bandswitch.. yet use different wafers. Two separate switchs, one below the chassis and one above the chassis.. and driven by a plastic chain is nomal..or a relay scheme etc. SB; /archives//html/Amps/2014-02/msg00002.html (9,496 bytes)

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