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1. [Amps] Schematic drawing software? (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Fri Jul 4 08:11:42 2003; Hi Floyd, I use DeltaCAD http://www.dcad.com/ low cost ($40), works with XP (XP/PRO, I don't have XP/HOME), better suited for laying out chassis & panels but can be used for diagrams, you have to coo; /archives//html/Amps/2003-07/msg00023.html (8,379 bytes)
2. [Amps] 4CX250B/F (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Fri Jun 20 08:21:29 2003; Guillermo, the EIMAC datasheet for the 4CX250B/7203 and 4CX250FG/8621 (same datasheet) shows 30 seconds minimum, 60 seconds nominal warm-up time. The introduction states that the tubes are identical; /archives//html/Amps/2003-06/msg00148.html (7,826 bytes)
3. [Amps] Mil Connector Source (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Tue May 6 09:57:20 2003; My apologies for posting this to a bunch of places, but I think it's worth busting a rule or two. If you are in need of "Military Style" connectors, try: William Perry Co. 702 Beechwood Road Louisvil; /archives//html/Amps/2003-05/msg00043.html (6,924 bytes)
4. [Amps] Protecting the tubes! (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Fri May 9 08:47:34 2003; I am in the early stages of lashing together a Harris RF-110 amp. It runs a pair of 8122s in class A driving a pair of 4CX1500Bs. I am driving it with the transverter output of my Kenwood TS-850, abo; /archives//html/Amps/2003-05/msg00071.html (8,486 bytes)
5. [Amps] Protecting the tubes! (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Sat May 10 13:42:54 2003; Thanks Rich There is indeed a termination resistor - before the blocking cap there is a .22uH coil to a 56 ohm resistor to ground. The input is quite flat from 160 through 10M according to my analyze; /archives//html/Amps/2003-05/msg00077.html (10,078 bytes)
6. [Amps] Protecting the control grid of a tetrode (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Sat May 10 13:43:00 2003; Let me start this over. Typically it is imperative to not apply drive to a grid driven tetrode unless anode voltage is applied. This is usually accomplished by interlocking the T/R switching. I have; /archives//html/Amps/2003-05/msg00080.html (7,461 bytes)
7. [Amps] Protecting the tubes! (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Wed May 14 08:15:57 2003; Traian, the TS-850 transverter output goes to the "IF OUT" jack (RCA phone jack). To enable the transverter, the internal cable to the jack gets replugged - this of course disables the IF OUT capabil; /archives//html/Amps/2003-05/msg00111.html (15,532 bytes)
8. [Amps] PS project (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Thu Apr 10 15:30:44 2003; Lynn..... What kind of power are you shooting for??? I assume it's 240VAC mains, at 25A is SIX KW. If your efficiency is crap, you're still twice the legal limit.... I'm also assuming we're talking a; /archives//html/Amps/2003-04/msg00102.html (8,984 bytes)
9. [Amps] Re: (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Thu Apr 10 19:36:26 2003; Lynn, 5KV @ 600mA is 3KW input. If you're only getting 500W out, I would suspect something amiss in the tank circuit. I'd expect 1500W to 1800W out with 3000W in. Just had a thought.... You say 20W d; /archives//html/Amps/2003-04/msg00109.html (9,178 bytes)
10. [Amps] QEX article needed (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Sat Apr 19 09:30:04 2003; While not the usual QRO discussion here, I am looking for a copy of "A 1.8 to 54 MHz 5-Watt Amplifier" from QEX May 1992, page 7. Anybody have it & a scanner?? Thanks, Bill ~~~~~~~~~~~~~~~~ Bill Cole; /archives//html/Amps/2003-04/msg00184.html (6,280 bytes)
11. [Amps] Hard-drive Dive (score: 212): Author: n2bc at stny.rr.com (Bill Coleman N2BC); Date: Sun Mar 23 08:54:35 2003; Hi Ian, The 30S-1 L101 is a silver plated inductor. I believe it is used to lower the effective plate load resistance to allow a reasonable tank Q at higher frequencies. I did this with a 5CX1500 RF; /archives//html/Amps/2003-03/msg00787.html (11,833 bytes)

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