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Total 78 documents matching your query.

21. Re: [Amps] Linear Amps (score: 1)
Author: "Jeff Carter" <amps@hidden-valley.com>
Date: Wed, 3 Dec 2008 16:05:39 -0500
I take your point. However, regardless of how sunny my outlook happens to be on any given day, the fact remains that the economics and sophistication of modern technology has surpassed the ability of
/archives//html/Amps/2008-12/msg00078.html (9,300 bytes)

22. [Amps] SB-220 (score: 1)
Author: "Jeff Carter" <amps@hidden-valley.com>
Date: Mon, 15 Dec 2008 19:05:51 -0500
Hi all, Well, I finally finished the godzillion solder connections inside my SB-220 project. Now, I've got to find some tubes. While I look for the tubes, are there any safe, approved, and effective
/archives//html/Amps/2008-12/msg00230.html (7,011 bytes)

23. Re: [Amps] SB-220 (score: 1)
Author: "Jeff Carter" <amps@hidden-valley.com>
Date: Mon, 15 Dec 2008 20:18:50 -0500
You're right, of course. This old analog meter will do 6KV but you actually have to change the leads to the 6KV position. I was reading one scale and measure another. It's not 5500, it's 1.5KV, which
/archives//html/Amps/2008-12/msg00231.html (7,291 bytes)

24. Re: [Amps] SB-220 (score: 1)
Author: "Jeff Carter" <amps@hidden-valley.com>
Date: Mon, 15 Dec 2008 21:24:39 -0500
Well, I apologize. I should not have gotten so excited from having finished this amplifier, and started posted stupid questions out of excitement. Once I correctly set up my volt meter, I am showing
/archives//html/Amps/2008-12/msg00233.html (7,336 bytes)

25. Re: [Amps] SB-220 (score: 1)
Author: "Jeff Carter" <amps@hidden-valley.com>
Date: Mon, 15 Dec 2008 22:46:49 -0500
You are right. The computer is in a different room than the amp project, and I got them transposed in the time it took me to walk to the computer. The voltages are where they should be. I see what yo
/archives//html/Amps/2008-12/msg00235.html (9,522 bytes)

26. Re: [Amps] 3CX1500D7 quote (score: 1)
Author: "Jeff Carter" <amps@hidden-valley.com>
Date: Thu, 8 Jan 2009 15:03:55 -0500
On the subject of tube cost: The cheapest price I can find for 3-500 tubes (for a SB-220) is at RF Parts. You folks seem to know where all the deals are, can I beat the price? This is for my own use
/archives//html/Amps/2009-01/msg00068.html (8,495 bytes)

27. [Amps] SB-220 Drive Levels (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Thu, 22 Jan 2009 17:49:59 -0500
Can anyone tell me how much drive the SB-220 needs to make 1.5KW? I've seen several references that 100W isn't enough drive for this amp. How much would it take? Jeff/KD4RBG _________________________
/archives//html/Amps/2009-01/msg00246.html (6,508 bytes)

28. [Amps] Procedure for New 3-500's... (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Mon, 26 Jan 2009 23:57:40 -0500
Hi all, I just got word from RF Parts that my new tubes (3-500's from Taylor) are on their way. Can someone point me to a good URL or other resource on how best to bring them up/burn them in? They'll
/archives//html/Amps/2009-01/msg00311.html (7,442 bytes)

29. [Amps] SB-220 and Copious Amounts of Smoke... (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Wed, 4 Feb 2009 00:28:10 -0500
Hi all, The SB-220 I've been rebuilding has developed a problem. I put brand new tubes in it, and when I fired it up, within ten minutes the filament transformer began *smoking*. I thought maybe some
/archives//html/Amps/2009-02/msg00056.html (7,111 bytes)

30. [Amps] SB-220 and Xfrmr Smoke...Part 2 (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Wed, 4 Feb 2009 16:04:53 -0500
Hi all, First, thanks for all the feedback. I bought another SB-220 chassis that had a filament transformer on it, so now I've got a replacement. Next question: I am trying to create a test for the r
/archives//html/Amps/2009-02/msg00087.html (7,657 bytes)

31. Re: [Amps] SB-220 and Xfrmr Smoke...Part 3 (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Wed, 4 Feb 2009 17:14:42 -0500
Folks, I've created a little bit of confusion by not being plain enough. Sometimes, a picture is what's required. I've been documenting this rebuild at http://www.kd4rbg.com and I hope that those of
/archives//html/Amps/2009-02/msg00094.html (8,325 bytes)

32. [Amps] SB-220 and Xfrmr Smoke...Part 4 (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Wed, 4 Feb 2009 23:51:19 -0500
Okay, the replacement transformer is installed, and life is good...except I'm beginning to think this amp is haunted. All voltages were checked and are present. Never again when working on an amp wil
/archives//html/Amps/2009-02/msg00102.html (7,352 bytes)

33. [Amps] Currency values/foreign hams...was SB-220 amp for sale on ebay.... missing parts!! look at the insane price!!! (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Sat, 7 Feb 2009 11:24:01 -0500
Well, perhaps I can provide a little perspective to this. Some things are not always available elsewhere, and there are foreign hams for whom this could be a free buffet because of the depression of
/archives//html/Amps/2009-02/msg00174.html (13,917 bytes)

34. Re: [Amps] The SB220 Mystique (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Tue, 10 Feb 2009 14:45:30 -0500
I succumbed to the desire to revive a SB-220. "I did it myself" was a huge part of it. I wasn't able to identify a production amplifier with the same specs that was going to be as easy to bring back
/archives//html/Amps/2009-02/msg00278.html (10,343 bytes)

35. Re: [Amps] SB-220 troubles (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Thu, 12 Feb 2009 21:21:34 -0500
That's why I left the HV "protection" out of mine when I built it. I got called many, many bad names for doing that by the "Safety First" crowd. However, I've always worked around HV, and I've worked
/archives//html/Amps/2009-02/msg00396.html (9,056 bytes)

36. Re: [Amps] SB-220 troubles (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Fri, 13 Feb 2009 01:17:22 -0500
I'd be the first to admit I could make a mistake. However, I can't for the life of me picture how this particular interlock could save me. It seems to me that the psychology of this particular thing
/archives//html/Amps/2009-02/msg00404.html (8,171 bytes)

37. Re: [Amps] SB-220 troubles (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Fri, 13 Feb 2009 23:10:47 -0500
Spoken like a true gentleman. The Internet *and* Amateur Radio could use a bunch more just like you. Jeff/KD4RBG _______________________________________________ Amps mailing list Amps@contesting.com
/archives//html/Amps/2009-02/msg00435.html (9,049 bytes)

38. Re: [Amps] SB-220 troubles (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Fri, 13 Feb 2009 23:15:38 -0500
Maybe I'm wrong for feeling this way, but I figure that anybody who buys a thirty year old amplifier will either go over it very carefully before applying power, or they'll go over it very carefully
/archives//html/Amps/2009-02/msg00436.html (9,958 bytes)

39. Re: [Amps] SB-220 troubles (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Fri, 13 Feb 2009 23:26:24 -0500
Contests? Heavens, no. I didn't build this amp to run it in contests. In fact, I've never had it on the air. I ran it into a dummy load after I'd completed it, verified the +10db output, and then pul
/archives//html/Amps/2009-02/msg00437.html (9,545 bytes)

40. Re: [Amps] Question for All Amp Builders... (score: 1)
Author: Jeff Carter <amps@hidden-valley.com>
Date: Thu, 19 Feb 2009 23:38:28 -0500
I could be wrong, but I always thought that the tube manufacturer gave sample circuits and/or specs with any given tube to allow you to do proper impedance matching and thereby get Maximum Power Tran
/archives//html/Amps/2009-02/msg00582.html (7,931 bytes)

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