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1. [Amps] screen grid current question on gu-84b (score: 1): Author: "ka1mwp" <ka1mwp@comcast.net>; Date: Sat, 18 Apr 2009 08:08:08 -0400; I assembled the amp over the last few months using the TETRODE boards. Info: plate voltage = 2350 Grid 1 -65v Grid 2 365v RF Input 50ohm to ground You can see the schematic at http://home.comcast.net; /archives//html/Amps/2009-04/msg00164.html (7,587 bytes)
2. Re: [Amps] screen grid current question on gu-84b (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Sat, 18 Apr 2009 06:18:11 -0700; ORIGINAL MESSAGE: REPLY: It sounds ok so far. I have not used a GU-84b but I have used a 4CX1000A and they should be similar. With zero drive, the screen current is a little negative. With increasing; /archives//html/Amps/2009-04/msg00165.html (7,756 bytes)
3. Re: [Amps] screen grid current question on gu-84b (score: 1): Author: "Gary Schafer" <garyschafer@comcast.net>; Date: Sat, 18 Apr 2009 13:02:37 -0400; It depends on the particular type of tube used. With a 4CX1000 I experienced similar readings to what Bill notes. However when the screen current was in the negative region, tuning the plate tuning w; /archives//html/Amps/2009-04/msg00166.html (10,680 bytes)
4. Re: [Amps] screen grid current question on gu-84b (score: 1): Author: "Bill, W6WRT" <dezrat1242@yahoo.com>; Date: Sat, 18 Apr 2009 17:22:03 -0700; ORIGINAL MESSAGE: REPLY: Good point. I forgot to mention that while an Eimac and a Taylor 4CX1000A both tuned in the same general manner, the Eimac showed much greater negative screen current than th; /archives//html/Amps/2009-04/msg00167.html (7,414 bytes)

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