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References: [ +from:rbonner@qro.com: 226 ]

Total 226 documents matching your query.

1. [Amps] Plasma Therm (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Mon, 28 Aug 2006 10:47:33 -0500
Gentlemen, I have been trying to locate schematics for Plasma Therm HFS-1000G power units to ease conversion to amateur service. I've done the manufacturers contact route. If anyone has information p
/archives//html/Amps/2006-08/msg00737.html (6,716 bytes)

2. Re: [Amps] Parasitics & Filament Sag (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Mon, 28 Aug 2006 16:05:26 -0500
I have only had one 3-500Z amplifier take off on me when I was purposely testing PC suppressors back in the early 1970's. I was attempting to improve 15 and 10 meter performance. For some stupid reas
/archives//html/Amps/2006-08/msg00743.html (8,682 bytes)

3. Re: [Amps] TL-922 question (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 29 Aug 2006 11:09:43 -0500
Sorry I responded to this question last evening via my blackberry. Apparently it only sent the message to the original poster. Just a little preview: I put myself through college in the 70's working
/archives//html/Amps/2006-08/msg00770.html (10,441 bytes)

4. Re: [Amps] Heat spreader for solid-state amps (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 29 Aug 2006 11:25:12 -0500
Yes the 1/2" unit would be better. The EB104 dumps mega-watts of heat in a 1" square of spreader. The thicker conductor will allow a wider path through the conductor to spread the heat. Can you go to
/archives//html/Amps/2006-08/msg00771.html (9,184 bytes)

5. Re: [Amps] TL-922 question (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 30 Aug 2006 09:35:45 -0500
See below R. B.: Did you measure the C to determine this? ** The course of action was: I visually inspected the bandswitch through its operation and determined it didn't have any intermittent, flashe
/archives//html/Amps/2006-08/msg00811.html (9,400 bytes)

6. Re: [Amps] Need Japan Radio Plate Transformer Info (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Fri, 1 Sep 2006 11:46:35 -0500
My God Phil, if you are going to make a comment on this reflector make sure at least you spell your words correctly. Supercalifragilisticexpialidocious Apparently my undergrad studies were in Mary Po
/archives//html/Amps/2006-09/msg00020.html (8,343 bytes)

7. [Amps] Astron and Kenwood TL922-A Replacement Case Parts (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Sat, 2 Sep 2006 21:04:03 -0500
(922) Yeah just keep hanging out here. If a couple more of them blow up here on channel just pick up the leftover parts. (Astron) I power the DC things at my main op position with a pair of RS-70M's
/archives//html/Amps/2006-09/msg00048.html (7,970 bytes)

8. Re: [Amps] Inexpensive variable air cap for amps (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 5 Sep 2006 11:36:04 -0500
Yes the place you cannot insert the film is the plate to shaft spacing and that's where it will arc next. Also the fiber wafers insulating the fixed plates will probably blow apart. This is why the H
/archives//html/Amps/2006-09/msg00103.html (7,716 bytes)

9. Re: [Amps] Henry 3K-A Step Start Resitor Cone (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 6 Sep 2006 10:04:56 -0500
The Heater elements in my 4K-Ultra were straight round elements (now since sold) they were different than the elements in for say the Henry RF Heater units which I have converted several to amateur s
/archives//html/Amps/2006-09/msg00123.html (9,523 bytes)

10. Re: [Amps] NOS 4CX1000A test and reconditioning (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Fri, 8 Sep 2006 21:50:59 -0500
Well now what? I built this big test rack last night and have 2 3-500's, 6 8877/YU-158's, 3 3CX3000A7's, 2 YC-156's an 8938 heated up. The 14 12AX7's look pretty cool - fans running everywhere All my
/archives//html/Amps/2006-09/msg00150.html (9,990 bytes)

11. Re: [Amps] NOS 4CX1000A test and reconditioning (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Fri, 8 Sep 2006 22:02:44 -0500
I think we're going to have to admit that both methods are in use, filaments on or off. It all depends on the Attitude of the chief and the mentality of the owners. Can you live with a 10 minutes of
/archives//html/Amps/2006-09/msg00151.html (8,738 bytes)

12. Re: [Amps] Gerritsen (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Tue, 19 Sep 2006 16:54:53 -0500
After modifying his ham band only UHF transceiver for all band coverage, he put the hammer down on a local police repeater and was babbling you can pry my cold dead fingers, etc until they captured h
/archives//html/Amps/2006-09/msg00230.html (7,607 bytes)

13. Re: [Amps] amplifier design (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Thu, 21 Sep 2006 15:55:08 -0500
Scott, stop messing around. If you want to be a big time amp builder start the way most of us did. Build yourself an experimental beginner pair of 813's for 20M, fire up and use it. Learn how the pow
/archives//html/Amps/2006-09/msg00270.html (8,207 bytes)

14. Re: [Amps] amplifier design (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Thu, 21 Sep 2006 16:45:08 -0500
YES, that's about it. White smoke and all. Harold/Bob That 813 amp. I was maybe 16 years old. It had a set of mercury vapor rectifiers in it... Well I always heard you didn't want the mercury to RUN
/archives//html/Amps/2006-09/msg00271.html (9,580 bytes)

15. Re: [Amps] TE Systems (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Fri, 22 Sep 2006 07:42:06 -0500
John, Burghardt's Amateur Radio is a TE systems dealer. However, I had some issues when ordering my own TE SYS amplifiers. The wires got crossed between the dealer and TE on my 222 amp and I ended up
/archives//html/Amps/2006-09/msg00280.html (9,505 bytes)

16. Re: [Amps] HV stabilisation in a triode amp (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Fri, 22 Sep 2006 07:52:42 -0500
Ripple on either amplifier will appear in the output. It's the PY5ASN syndrome, rest and Bless his soul. The tetrode screen needs to be highly regulated to stabilize the gain of the amplifer. BOB DD
/archives//html/Amps/2006-09/msg00281.html (7,628 bytes)

17. Re: [Amps] Titan 425 Reflected Power (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Sun, 24 Sep 2006 16:42:28 -0500
Jim, Several things are going on here. First, Antennas are supposed to be resonant and matched to your feedline. Second and almost always overlooked because wavelengths at HF are so long (I see massi
/archives//html/Amps/2006-09/msg00293.html (11,375 bytes)

18. Re: [Amps] Need Some Experienced Feedback Here... (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 27 Sep 2006 18:53:15 -0500
Eddy, The experience you were experiencing were changes in the fixed caps value due to heating of the components. Even though your doorknobs were rated at 20KV it is the current flow through them tha
/archives//html/Amps/2006-09/msg00329.html (12,309 bytes)

19. Re: [Amps] Need Some Experienced Feedback Here... (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Wed, 27 Sep 2006 22:37:48 -0500
The difference here I think is the ratios between the bread slicers and the fixed caps. If you have a 1000pf bread slicer and a 200pf fixed cap compared to a 200pf bread slicer and a 1000pf fixed cap
/archives//html/Amps/2006-09/msg00332.html (9,810 bytes)

20. Re: [Amps] Bad tubes from Ebay (score: 1)
Author: "Robert B. Bonner" <rbonner@qro.com>
Date: Thu, 28 Sep 2006 15:15:42 -0500
The eBay Russian tubes, even when shipped from the USA yield poor results. A buddy of mine thought hey, let's pick up a cheap spare set of 4CX800 Russian tubes as a back up for the ones in his QRO. H
/archives//html/Amps/2006-09/msg00342.html (8,888 bytes)

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