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Total 562 documents matching your query.

1. [Amps] T'bolt ideas (score: 1)
Author: (John Lyles)
Date: Fri, 10 Jan 2003 11:38:48 -0700
Bill (Wa4Lav) is looking to improving a T'bolt. I just went through ours (at work) and got it back on the air for some experimental work (as it can tune anywhere in the HF spectrum). Quickly I found
/archives//html/Amps/2003-01/msg00078.html (9,269 bytes)

2. [Amps] class AB2 4-400As (score: 1)
Author: (John Lyles)
Date: Sat, 11 Jan 2003 14:55:58 -0700
I agree that AB2 isn't as clean for the amplifier, which is why I liked the commercial Heatkit KL1 Chippewa since it raised Eb and ran AB1 instead for a kW. 73 John
/archives//html/Amps/2003-01/msg00094.html (6,179 bytes)

3. [Amps] T'bolt input (score: 1)
Author: (John T. M. Lyles)
Date: Mon, 13 Jan 2003 08:54:45 -0700
Interesting how the Thunderbolt quickly becomes T'bolt online! The tuned input mode is preferrable instead of the 350 Ohm mode, which was made to work with Rangers, Navigaotors, Vikings, Messengers w
/archives//html/Amps/2003-01/msg00101.html (7,272 bytes)

4. [Amps] AB2 (score: 1)
Author: (John T. M. Lyles)
Date: Tue, 14 Jan 2003 08:44:19 -0700
I am designing with a 500 kW tetrode-based (Thales TH781 tube) AB2 amplifier at 200 MHz right now, running the loadline/fourier analysis. If i ran AB1 the thing would not produce what I want. But i a
/archives//html/Amps/2003-01/msg00111.html (7,978 bytes)

5. [Amps] Anodize versus alodine/chromate conversion (score: 1)
Author: (John T. M. Lyles)
Date: Wed, 15 Jan 2003 10:55:09 -0700
Its true that anodize is a non conductive hard coating on aluminum while the alodine/iridite/etc are chromate conversion coatings which are quite conductive. They stabilize the aluminum from the long
/archives//html/Amps/2003-01/msg00119.html (7,594 bytes)

6. [Amps] Vintage Parts Request (score: 1)
Author: (John T. M. Lyles)
Date: Tue, 21 Jan 2003 10:33:09 -0700
Vintage Amp Parts Wanted: 4 Long screws from Johnson Thunderbolt or Five Hundred cabinet, which hold outer cover to front panel. Screen/Grid current Meter for Heathkit Chippewa KL1, the left meter Jo
/archives//html/Amps/2003-01/msg00173.html (6,350 bytes)

7. [Amps] screen current (score: 1)
Author: (John Lyles)
Date: Sun, 1 Dec 2002 09:37:43 -0700
In pulsed operation, here is an example of actual operation where screen current goes up, when anode is dropping off: A 18 kV anode B+ supply has an interlock relay powered off a voltage divider, so
/archives//html/Amps/2002-12/msg00003.html (7,169 bytes)

8. [Amps] info needed (score: 1)
Author: (John T. M. Lyles)
Date: Thu, 5 Dec 2002 09:21:25 -0700
Can someone send me just a photocopy of schematic of the Harris RF103A amplifier which has the 3-1000Z. I gutted it out, and have this nice heavy epoxied brown plate transformer which I want to reuse
/archives//html/Amps/2002-12/msg00089.html (6,704 bytes)

9. [Amps] RF103 info received! MOSFET Question (score: 1)
Author: (John Lyles)
Date: Fri, 6 Dec 2002 13:41:10 -0700
Wow, this mailing list does work well, for unique data. I got >2 responses for the Harris RF103 schematic and transformer info, and today Posselt, OE2WPO, emailed me a PDF of the manual. Gerald, W5BA
/archives//html/Amps/2002-12/msg00123.html (8,107 bytes)

10. [Amps] BTA10H (score: 1)
Author: (John Lyles)
Date: Sun, 15 Dec 2002 11:27:53 -0700
Is the BTA 10H Ampliphase or plate modulated? John K5PRO
/archives//html/Amps/2002-12/msg00203.html (5,952 bytes)

11. [Amps] Class B, E and F (score: 1)
Author: (John T. M. Lyles)
Date: Fri, 20 Dec 2002 09:55:42 -0700
There is an article by Russian RF engineer Andrei Grebennikov of M/A Com's Irish division on High Efficiency Class B, E and F Power Amplifiers in Microwave Journal, December 2002 issue. He covers the
/archives//html/Amps/2002-12/msg00227.html (6,856 bytes)

12. [Amps] Class B, E and F (score: 1)
Author: (John T. M. Lyles)
Date: Fri, 20 Dec 2002 13:31:30 -0700
Thanks Dave (K1FK) for the tip. View the article online. 73 K5PRO
/archives//html/Amps/2002-12/msg00228.html (6,639 bytes)

13. [Amps] resistor (score: 1)
Author: (John T. M. Lyles)
Date: Mon, 23 Dec 2002 14:38:29 -0700
For HV "glitch" resistor, avoid wirewound construction, both in the sand packages or in the big tubular ceramics, for 5 kV 1 Amp and higher supplies. Carborundum is the best way to go, if you can get
/archives//html/Amps/2002-12/msg00254.html (6,793 bytes)

14. [Amps] use of load resistors for HV (score: 1)
Author: (John T. M. Lyles)
Date: Tue, 24 Dec 2002 11:15:11 -0700
I haven't tried them, because they are even more difficult to come by here. However, Bird and Altronics both make the thin film on ceramic for their RF loads, and the ratings for CW, average are near
/archives//html/Amps/2002-12/msg00268.html (7,050 bytes)

15. [Amps] mystery amp (score: 1)
Author: (John T. M. Lyles)
Date: Mon, 4 Nov 2002 11:41:28 -0700
There is a mystery amplifier which I am considering acquiring, for the parts. It is about the size of an apartment sized refrigerator, say, 3 feet tall. On wheels. Open the front door and there are t
/archives//html/Amps/2002-11/msg00020.html (7,351 bytes)

16. [Amps] more on mystery amplifier (score: 1)
Author: (John T. M. Lyles)
Date: Mon, 4 Nov 2002 13:19:04 -0700
OK, I have gotten some replys with Harris RF102 and RF101 shown. The amplifier I mentioned is not these, but it might be a variant of the 101, earlier model? The 101 had two 3-500Z i think, and this
/archives//html/Amps/2002-11/msg00023.html (6,404 bytes)

17. [Amps] conclusion - Harris RF103(A) (score: 1)
Author: (John T. M. Lyles)
Date: Tue, 5 Nov 2002 09:37:48 -0700
Thanks all who commented, I believe that I can safely conclude that I found a RF103 or 103A made by Harris/RF Communications Div. many years ago. It isn't very good shape, being in a basement of loca
/archives//html/Amps/2002-11/msg00037.html (7,538 bytes)

18. [Amps] HFS1000G RF Plasma Products amp (score: 1)
Author: (John T. M. Lyles)
Date: Tue, 5 Nov 2002 09:47:18 -0700
I got the RFPP HFS1000G converted to 5 MHz a week back, at work. It was at ISM freq 13.56 MHz. Now it is driving a dedicated experiment, easily providing a kW output. Efficiency is about 69% not coun
/archives//html/Amps/2002-11/msg00038.html (7,386 bytes)

19. [Amps] pandoras parasites (score: 1)
Author: (John T. M. Lyles)
Date: Wed, 6 Nov 2002 16:38:46 -0700
Yes I opened a box when I said the 8877 amplifier by RF Plasma Prod didn't use anode parasitic suppressors. I used the same unit, and modified it down to 5 MHz from 13.56, and didn't add them either.
/archives//html/Amps/2002-11/msg00078.html (8,484 bytes)

20. [Amps] 10 kWp from 8877 (score: 1)
Author: (John T. M. Lyles)
Date: Wed, 6 Nov 2002 17:47:17 -0700
The 8877 plate current curves do get to 5 Amps, but the cathode I max isn't specified on the datasheet. plate current max is stated at 1 Amp, however, this is not a pulsed rating. Oxide cathodes are
/archives//html/Amps/2002-11/msg00079.html (6,480 bytes)

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