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1. [Amps] Ep Sweet Spot (score: 1): Author: <sccook1@cox.net>; Date: Mon, 29 Jan 2007 8:24:16 -0800; Team, Playing around with my TL-922A this weekend (pair of 3-500Zs), I noticed that the amp was significantly more efficient with the plate voltage set to the lower voltage (2.2KV vs 3.2KV). For a gi; /archives//html/Amps/2007-01/msg00317.html (7,064 bytes)
2. Re: [Amps] Ep Sweet Spot (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Mon, 29 Jan 2007 15:50:50 -0500; Did you retune the tank? Tank loaded Q has little to do with efficiency unless it falls totally off the perch, or unless the tank has very high loss. My bet is you have a tuning or metering error. T; /archives//html/Amps/2007-01/msg00324.html (7,159 bytes)
3. Re: [Amps] Ep Sweet Spot (score: 1): Author: <sccook1@cox.net>; Date: Mon, 29 Jan 2007 13:22:32 -0800; It occured to me that the CW / SSB switch also changes the bias -- less ZSAC on CW. Perhaps this is the reason efficiency changes. Coaxial Dynamics wattmeter used to measure output 500W and input cac; /archives//html/Amps/2007-01/msg00326.html (7,971 bytes)

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