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Total 85 documents matching your query.

21. Re: [Amps] YIKES! (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Fri, 21 May 2010 09:10:57 -0700
Soooo... what is the current street price on a Drake L4B, in Good condition/without the current Harbach, upgrades? Best Regards, 73, de Pat Barthelow AA6EG Arecibo Video Tours: http://www.youtube.com
/archives//html/Amps/2010-05/msg00242.html (7,865 bytes)

22. [Amps] Huge Estate Sale, QRO of all kinds (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Fri, 21 May 2010 21:57:41 -0700
Folks, I just stumbled onto a ham, taking care of an estate sale for an SK ham in N. Caliornia. Wasn't able to look in detail, (going back tomorrow) but many well built complete, Custom, complete, ge
/archives//html/Amps/2010-05/msg00282.html (8,526 bytes)

23. [Amps] QRO Stuff Update: (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sat, 22 May 2010 16:07:08 -0700
Folks, An Update after my visit to see the amps and Parts: Photos taken today. 2 x 4-1000A amp perfect, Power Supply not shown, floor roll around cabinet. Peter Dahl $2500 HF 2x 3-500Z or 4-400As wit
/archives//html/Amps/2010-05/msg00308.html (9,190 bytes)

24. [Amps] QRO Photos; Sri (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sat, 22 May 2010 16:11:25 -0700
Sorry, Photos at: http://cid-2eb5c45df634a712.skydrive.live.com/browse.aspx/QRO%20Stuff Folks, An Update after my visit to see the amps and Parts: Photos taken today. 2 x 4-1000A amp perfect, Power S
/archives//html/Amps/2010-05/msg00309.html (9,150 bytes)

25. Re: [Amps] HV Connectors (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sun, 23 May 2010 19:11:05 -0700
I googled High voltage coaxial connector and got a lot of stuff on HV connectors out there. I was always spooked with any cables or wires carrying B+ lethal level voltages between P/S and RF decks th
/archives//html/Amps/2010-05/msg00368.html (11,858 bytes)

26. Re: [Amps] How to read the 3-500Z spec sheet? (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Mon, 24 May 2010 08:15:23 -0700
For some years now, after acquiring some things from the Bill Orr (W6SAI) Estate, I have stored a Specialized spectrum Analyzer (TS-1379A/U) and a precision mil spec two tone generator, that Bill use
/archives//html/Amps/2010-05/msg00387.html (19,440 bytes)

27. Re: [Amps] HV Connectors - Millen? (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 26 May 2010 07:57:26 -0700
Perhaps an easy safety fix on the scary Millen on the back of Drake L-4B,etc, would be to find a hardware store short section copper pipe or coupler with a close fitting diameter to the OD of the Mil
/archives//html/Amps/2010-05/msg00404.html (12,714 bytes)

28. [Amps] Fermi Lab HV solutions (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 26 May 2010 08:18:07 -0700
I am surprised that Fermilab rates RG 213 for use up to 20KV. Also, here is the HV connector website of Teledyne Reynolds, referred to in the text below: http://www.teledynereynolds.com/product/1sing
/archives//html/Amps/2010-05/msg00405.html (10,182 bytes)

29. Re: [Amps] Centurion plate current issue (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Wed, 9 Jun 2010 17:03:22 -0700
Hi Gary, Just BE CAREFUL, jumping in and out of the RF Deck, Discharging B+, etc, while hot, or not hot, checking for heat and such on the plate caps....In fact, would not be a bad idea to have a fel
/archives//html/Amps/2010-06/msg00099.html (10,088 bytes)

30. Re: [Amps] Centurion plate current issue (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 10 Jun 2010 10:53:40 -0700
Have heard of the solder melting and dripping away on filament pins. Probably good thing, to use as a flag warning of cooling problems, or heavy abuse of the amp, suggesting attention to more cooling
/archives//html/Amps/2010-06/msg00109.html (11,207 bytes)

31. [Amps] Heat Measurement in Amps (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 10 Jun 2010 11:07:37 -0700
Has anyone found a decent cheap temperature sensor/guage (perhaps even at harbor freight, etc) that you could place at a specified location in the exhaust airstream of the tubes, of various amps to s
/archives//html/Amps/2010-06/msg00110.html (8,231 bytes)

32. Re: [Amps] Transformer Calcs (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Fri, 11 Jun 2010 11:08:10 -0700
For a KW level HV transformer, is there much difference between the temp that you can touch and measure, say at the outside laminations, and perhaps the more important temperatures in the core center
/archives//html/Amps/2010-06/msg00127.html (10,734 bytes)

33. Re: [Amps] SB-220 (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sun, 13 Jun 2010 11:31:46 -0700
Hello Jeff, First you have to locate the "spitting noise", and find the cause. That noise is often arc over on a Tune capacitor. (Or heaven forbid the bandswitch.) Take a close look down into the RF
/archives//html/Amps/2010-06/msg00166.html (9,258 bytes)

34. Re: [Amps] Cleaning tubes (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 17 Jun 2010 10:15:10 -0700
If you have lost the tube markings on the tube envelope, try this which I remember from years ago. Put the tube in the refrigerator, cool it down, then bring it into a warm room temp environment. The
/archives//html/Amps/2010-06/msg00180.html (8,950 bytes)

35. Re: [Amps] New High Efficiency 3-500Z plate caps (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 1 Jul 2010 07:14:30 -0700
Cool, ....So to speak... They resemble closely the design of the factory plate heat dissapators on the Drake L-4B Also, I wonder if there is any heat transfer advantage to be gained by smearing a thi
/archives//html/Amps/2010-07/msg00007.html (8,378 bytes)

36. Re: [Amps] New High Efficiency 3-500Z plate caps (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 1 Jul 2010 20:18:15 -0700
My Drake L-4B has straight sided Chimneys. I have also used very similar Coleman lantern envelopes on home brew 3-500Z amps. The thru glass electrode looks quite thick and substantial, same for the 3
/archives//html/Amps/2010-07/msg00021.html (12,748 bytes)

37. Re: [Amps] 3-500Z blue glow on glass (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Fri, 2 Jul 2010 12:34:29 -0700
I have seen two types of blue glow in a TX vacuum tube. One, on the inside of the glass envelope, and another can be seen in the case of 3-500Zs by looking vertically down between the slits in the fo
/archives//html/Amps/2010-07/msg00033.html (10,120 bytes)

38. Re: [Amps] Glass tube plate color answers (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Sun, 15 Aug 2010 12:24:47 -0700
I like Charlie's answer.... Reminds me of a test I did with some old 4-400As. I plugged them in to a Drake L-4B to see what the power out would be, compared to the prescribed 3-500Zs. Somewhat less,
/archives//html/Amps/2010-08/msg00234.html (15,679 bytes)

39. Re: [Amps] Nice freebie (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Tue, 17 Aug 2010 16:56:47 -0700
I think if you google on line calculators, you can find and down load RPN or Algebraic calculators for free. I seem to recall quite a few, even full Scientific calcs.... Incredible, since I remember
/archives//html/Amps/2010-08/msg00281.html (7,878 bytes)

40. Re: [Amps] Can I cool too much the tubes? (score: 1)
Author: Patrick Barthelow <apolloeme@live.com>
Date: Thu, 19 Aug 2010 21:40:37 -0700
Does anyone have a schematic for the amp under discussion, or perhaps looked to see the sensor device that senses excessive heat to trigger a shutdown? I am curious what they sample for the heat trip
/archives//html/Amps/2010-08/msg00333.html (11,841 bytes)

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