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1. [Amps] 2500uf @ 450v dc ElectroCaps (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Wed Jul 2 07:57:20 2003; I was always told that something in the order of 20-50uF of C was about right for EHT supplies. The energy stored being: e = 0.5 x C x V^2 (from dim and distand recollection :-). The bigger the cap b; /archives//html/Amps/2003-07/msg00004.html (9,152 bytes)
2. [Amps] Anode clearance and Chassis WANTED (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Mon Jun 16 08:16:07 2003; Depends what 'problems' you are thinking of... * an air gap of 25mm has more than enought dialelectric strength to deal with 4Kv DC + many Kv of RF * you might have an issue with stray C on higher ba; /archives//html/Amps/2003-06/msg00102.html (8,237 bytes)
3. [Amps] need 4cx1500b / 4cx1000a diagram (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Thu May 1 08:51:25 2003; On what frequency? HF, 6m, 2M ? I wouldn't consider using these tubes in GG operation - they are nice Tetrodes and should be in a nice tuned-input/tuned-output grid driven design, preferrably with t; /archives//html/Amps/2003-05/msg00002.html (7,175 bytes)
4. [Amps] 6M 8171 (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Mon Apr 21 09:06:29 2003; transformer withstand QUIET I'm capacitances Barrie, I don't know the specifics of the 8171 (4CX10000 ?) but I have played with 8877, 3-500 and 3CX800 amps on 6m. The relatively large anode capacita; /archives//html/Amps/2003-04/msg00200.html (9,056 bytes)
5. [Amps] 6M 8171 (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Tue Apr 22 08:54:23 2003; transformer to withstand QUIET 6 I'm capacitances problem scaled ? The RL of an 8171 is c. 1200?, so, at 50MHz, a total C-Tune of roughly 80pF is needed for a Q of 15. Since the anode-screen C, stra; /archives//html/Amps/2003-04/msg00207.html (10,477 bytes)
6. [Amps] SELL: 6 Bleeder Resistors 40K@100W (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Sat Feb 8 15:48:00 2003; Bifilar wound ??; /archives//html/Amps/2003-02/msg00175.html (8,198 bytes)
7. [Amps] cavity temperature (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Sun Feb 9 18:51:21 2003; David, Couple of thoughts: a) is the runing drifting through the heating cycle? f not then there's probably not too much to worry about b) if you haven't got access to a fancy infrared radiated tempr; /archives//html/Amps/2003-02/msg00211.html (8,758 bytes)
8. [Amps] PEP wattmeter (score: 219): Author: mike.tubby at thorcom.co.uk (Michael J. Tubby B.Sc. (Hons) G8TIC); Date: Mon Jan 27 06:55:50 2003; There are two types of Bird meter movement that I am aware of: 1. The standard movement used in models like Bird 43 which is 30uA and about 1350R internal resistance 2. The 100uA movement used on th; /archives//html/Amps/2003-01/msg00238.html (7,442 bytes)

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