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41. Re: [Amps] Who did it ? (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Thu, 28 Oct 2004 10:58:49 -0400; Jan Erik Holm wrote: Check this link out. Looks like the 450TH amp is in a PC tower case. 73 Jim SM2EKM http://www5a.biglobe.ne.jp/~jh2clv/handmaderadio.htm Hope he used plexiglas sides - big waste o; /archives//html/Amps/2004-10/msg00487.html (7,399 bytes)
42. Re: [Amps] Mish-Mash (score: 1): Author: jsb@digistar.com; Date: Fri, 5 Nov 2004 09:38:31 -0500 (EST); <sidebar> Check out the guts of ACOM's amplifiers. They're in "sealed" cabinetry. About 4,197 screws to remove to get at the tubes but hey, it works. </sidebar> ______________________________________; /archives//html/Amps/2004-11/msg00098.html (6,911 bytes)
43. Re: [Amps] Ten-Tec Centurion (score: 1): Author: jsb@digistar.com; Date: Thu, 11 Nov 2004 11:50:54 -0500 (EST); And the answer to that question comes in the form of my own Amplifiers mailing list at http://qrq.us/mailman/listinfo/amplifiers should the need arise. vy 73 Jason N1SU ______________________________; /archives//html/Amps/2004-11/msg00156.html (9,662 bytes)
44. [Amps] 3-500Z tube recommendations (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Thu, 11 Nov 2004 19:45:13 -0500; I am thinking about purchasing some new 3-500Z tubes for my Drake L4 - just wondering what recommendations anyone had. Currently the amp has a pair of 3-400Z Amperex graphite tubes from 1968. They wo; /archives//html/Amps/2004-11/msg00160.html (7,185 bytes)
45. Re: [Amps] HV/Tune-up Procedure for AL-80A (score: 1): Author: jsb@digistar.com; Date: Fri, 12 Nov 2004 08:53:57 -0500 (EST); It's not so much the idle HV but what the voltage drop is between ZSAC (key down but no signal from exciter) and full output - if it drops 500V or more you should connect it to 220VAC. A 500V drop in; /archives//html/Amps/2004-11/msg00169.html (8,694 bytes)
46. Re: [Amps] HV/Tune-up Procedure for AL-80A (score: 1): Author: jsb@digistar.com; Date: Fri, 12 Nov 2004 08:58:15 -0500 (EST); Need to clarify this - tune for max output at 20W, then tune for max output at 60W. If you try to tune the amp with 60W and the load and plate controls (and/or band switch) are not in the right place; /archives//html/Amps/2004-11/msg00170.html (7,874 bytes)
47. [Amps] tube flatulence - gettering (score: 1): Author: jsb@digistar.com; Date: Fri, 19 Nov 2004 12:42:08 -0500 (EST); Question: I was given a homebrew single 3-400Z amplifier which works but I noticed with ZSAC the top of the glass envelope has a very faint blue hue when looking across the top of the tube envelope.; /archives//html/Amps/2004-11/msg00282.html (7,267 bytes)
48. Re: [Amps] tube flatulence - gettering (score: 1): Author: jsb@digistar.com; Date: Fri, 19 Nov 2004 15:15:41 -0500 (EST); Interesting - so is it safe to assume that the blue fluorescence does not appear when idle because the tube has no bias to pull the electrons away from the ionization cloud? The blue glow only appear; /archives//html/Amps/2004-11/msg00298.html (10,477 bytes)
49. Re: [Amps] Question: Ameritron AL-80A tuning (score: 1): Author: jsb@digistar.com; Date: Wed, 1 Dec 2004 12:34:16 -0500 (EST); Peter SM/G3RZP raises a good point about SWR your radio sees going to the amp... you may have to re-tune the input coils to provide a proper match for your exciter. Also bear in mind that you probabl; /archives//html/Amps/2004-12/msg00008.html (7,916 bytes)
50. [Amps] Eimac 3-400Z date stamp (score: 1): Author: jsb@digistar.com; Date: Wed, 1 Dec 2004 14:00:03 -0500 (EST); hi, I have a couple 3-400Z tubes but I can't find the date stamp on the glass. The dome-shaped flashing along the bottom has 1T-833 engraved into it. Is there any way to derive when these tubes were; /archives//html/Amps/2004-12/msg00009.html (6,434 bytes)
51. Re: [Amps] Dx pedition amp ??? (score: 1): Author: jsb@digistar.com; Date: Thu, 2 Dec 2004 09:12:37 -0500 (EST); ACOM 1000 - it's one part but it's fairly "light" and will do a solid 1000W until the cows come home - and it works on every possible voltage you can throw at it, even handles bad generator power wit; /archives//html/Amps/2004-12/msg00026.html (7,940 bytes)
52. [Amps] Would this fit in a Plywood Box? (score: 1): Author: jsb@digistar.com; Date: Fri, 3 Dec 2004 16:28:25 -0500 (EST); http://www.hb9mm.com/photos/Sottens2004/IMG_9409 73 Jason N1SU _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2004-12/msg00053.html (6,428 bytes)
53. [Amps] L4-PS R12 burned - .825 ohm 2W resistor on pin 6 of cableharness (score: 1): Author: "Jason Buchanan" <jsb@digistar.com>; Date: Sat, 4 Dec 2004 19:11:30 -0500; hi all, R12 in my L4-PS burned to a crisp. Any ideas why and what I should look for as to why this happened? L4-PS is different than L4-B power supply, btw. Amp was working fine when this happened -; /archives//html/Amps/2004-12/msg00079.html (6,897 bytes)
54. Re: [Amps] SW (score: 1): Author: "Jason Buchanan" <jsb@digistar.com>; Date: Sun, 5 Dec 2004 10:03:49 -0500; It's my xmas present (I hope) Kaito 1102 is supposed to be very good. 73 Jason N1SU _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/m; /archives//html/Amps/2004-12/msg00082.html (6,795 bytes)
55. [Amps] Drake L4 with 3-400Z photos (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Fri, 14 Oct 2005 00:19:02 -0400; All this talk about AC mains got me stirred up to take some nice photos of Glow. I took the cover off my Drake L4 and took a few photos using a 60mm f/2.8D micro Nikkor. http://n1su.us/tubes/3-400Z-b; /archives//html/Amps/2005-10/msg00345.html (7,311 bytes)
56. Re: [Amps] Drake L4 with 3-400Z photos (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Fri, 14 Oct 2005 05:51:00 -0400; hi hi - to the naked eye the plates are a beautiful soft orange, not purple. I took these using a 60mm macro lens and Nikon D50 digital camera on a tripod - my guess is that there is light outside of; /archives//html/Amps/2005-10/msg00352.html (7,992 bytes)
57. Re: [Amps] Drake L4 with 3-400Z photos (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Fri, 14 Oct 2005 05:58:18 -0400; tsk tsk - yep, that 4-400 amp would make pennance - hi It's getting colder here in new england - but it only takes about 20 minutes for the L4 to warm up my lil shack to about 80F ! I had to search h; /archives//html/Amps/2005-10/msg00353.html (8,482 bytes)
58. Re: [Amps] Drake L4 with 3-400Z photos (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Fri, 14 Oct 2005 13:11:02 -0400; It's very old - 1966 vintage - I think someone rode it hard and put it away wet as with simple keydown ZSAC it glows brightly in that one spot. The newer tube to the right is equal in its appearance; /archives//html/Amps/2005-10/msg00383.html (8,878 bytes)
59. Re: [Amps] AC wiring (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Fri, 14 Oct 2005 22:28:04 -0400; My unasked for opinion: I have a 45' run of #10-3 to feed my Drake L4 220VAC - that's all it feeds. At most the plate voltage drops 250 VDC according to the meter between resting idle and full power; /archives//html/Amps/2005-10/msg00395.html (7,874 bytes)
60. Re: [Amps] AC wiring (score: 1): Author: Jason Buchanan <jsb@digistar.com>; Date: Sat, 15 Oct 2005 08:09:19 -0400; Not so lucky here - I've seen it dip as low as 108 here and rarely reach 120. In the winter the sag isn't so bad but the average voltage is usually around 112V. When the electric company is having a; /archives//html/Amps/2005-10/msg00402.html (8,581 bytes)

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