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1. [Amps] 2500 uF at 450V DC (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Thu Jul 3 09:09:27 2003; As I recall (I'd have to look) my broadcast AM transmitter that I use on 160M and 75M uses only two 8 MFD @ 4500VDC oil filled caps for the HV filters, choke input. The plate voltage runs 3200 VDC an; /archives//html/Amps/2003-07/msg00012.html (12,688 bytes)
2. [Amps] Coax jumper (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Fri Jun 13 08:31:46 2003; I seem to recall that RG-58 is rated at 600 watts at frequencies below 30 MHz. This presumes a matched load i.e VSWR at 1:1 which is what should exist between the amp and the tuner except during "tun; /archives//html/Amps/2003-06/msg00079.html (8,479 bytes)
3. [Amps] Schematic/Manual needed (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Thu Jun 19 08:31:30 2003; I am in need of a manual or copy there of, for a Harris PRD 2020 Vector Voltmeter. It is my understanding that Harris purchased PRD Electronics and then the division was again sold. Any help will be; /archives//html/Amps/2003-06/msg00129.html (6,301 bytes)
4. [Amps] electronic switching (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Sat Jun 21 09:43:52 2003; I use a pin diode switch at the antenna to switch the pre-amp in and out during TX and RX cycles. I supply RF (lots of it) and 12VDC. This is in a 50 ohm VHF circuit running "legal limit" so to speak; /archives//html/Amps/2003-06/msg00174.html (22,579 bytes)
5. [Amps] electrolyitc capacitors reply (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Sat Jun 21 09:43:57 2003; If these are "photo flash" type units I would proceed with caution. The ripple current will cause their life to be short. 73 Bob, K4TAX for what you want. At 10 are designed around 45-50 uF very ones; /archives//html/Amps/2003-06/msg00175.html (8,226 bytes)
6. [Amps] electronic switching (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Mon Jun 23 08:18:58 2003; My experience is that Tentec radios, like the Omni VI+ and the ORION, have superior QSK. They have had that for years. Too bad that many hams opt for radios with lots of whistles and bells. Most of w; /archives//html/Amps/2003-06/msg00184.html (10,200 bytes)
7. [Amps] Cheap right angle drives (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Wed Jun 25 09:25:03 2003; Check with Small Parts, Inc. Miami, FL www.smallparts.com 73 Bob, K4TAX could of angle completely piece. vac post Compared; /archives//html/Amps/2003-06/msg00209.html (10,348 bytes)
8. [Amps] G-G Amplifiers With No Tuned Input. (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Mon May 5 08:16:28 2003; I'd agree with the question, "how does the problem manifest itself?". I use a Paragon to drive the Centurion (which does have low pass filters for each band on the input). I'd suppose there is enough; /archives//html/Amps/2003-05/msg00027.html (10,449 bytes)
9. [Amps] ferrite transformers (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Fri May 30 08:54:37 2003; I too have had very good success with ferrite transformers. A word of caution from experience, power ratings are typical under ideal conditions. Add some mis-match or reactance and it seems that the; /archives//html/Amps/2003-05/msg00230.html (10,458 bytes)
10. [Amps] VHF Amp (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Mon Apr 21 10:16:09 2003; In thinking about selling my VHF amp, as I no longer use it, having replaced it with a HB 8877, I'm just wondering what the typical value might be. A military AM-494/R with a PP-638/U power supply al; /archives//html/Amps/2003-04/msg00202.html (7,256 bytes)
11. [Amps] 6M 8171 (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Tue Apr 22 10:08:14 2003; One of the approaches I've used in the past to adjust or tune PA output networks is the "reverse approach" use of a product like the MFJ Antenna Analyzer. Look at it this way. The PA output networks'; /archives//html/Amps/2003-04/msg00209.html (12,952 bytes)
12. [Amps] power cord strain relief recommendations? (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Mon Apr 28 10:04:44 2003; A standard 3/8" romex connector required only one hole. Works great. 73 Bob, K4TAX; /archives//html/Amps/2003-04/msg00226.html (7,625 bytes)
13. [Amps] Heathkit SB-220/221 HV Transformer (score: 208): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Sat Aug 2 17:17:52 2003; Typically the SB-220 runs some 2800 VDC at 600 to 800 mA. This is some 1600 to 2200 watts DC input. Thus the output is about 1000 to 1300 watts with an average efficiency of 60%. Yes the SB-220/221 t; /archives//html/Amps/2002-09/msg00291.html (9,685 bytes)

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