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Total 18 documents matching your query.

1. [AMPS] AL-811 (score: 1): Author: kg8co@lni.net (Brian Sarkisian); Date: Tue, 27 Oct 1998 18:28:40 -0500; Has any ever used 572B's inplace of the 811 tubes in the AL-811 amp ? And if so, how were the results ? 73 de Brian, KG8CO -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@conte; /archives//html/Amps/1998-10/msg00416.html (7,483 bytes)
2. [AMPS] AL-811 (score: 1): Author: zeitler@ibm.net (zeitler@ibm.net); Date: Tue, 27 Oct 1998 18:35:01 -0800; Brian, Yes. I had an AL-811 in the shack for around a year (also an 811H). I tried running 572Bs in both amps, three in the 811 and four in the 811H. Results: The amp did no better with the 572Bs. Th; /archives//html/Amps/1998-10/msg00417.html (9,577 bytes)
3. [AMPS] AL-811 (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Wed, 28 Oct 1998 08:32:25 -0500; So, Lane, the question begs to be asked: If driving the 811a's to 700 watts out is going to limit the life of these tubes, dosen't using 572b's offer a little more headroom here? Do you think they co; /archives//html/Amps/1998-10/msg00421.html (8,023 bytes)
4. [AMPS] AL-811 (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Wed, 28 Oct 1998 10:48:38 -0500; Much of the failure mode in 811 amps is plate meltdown from over tuning, etc. The air flow in some of those cheap amps is marginal as well as Pi-net design at the highest bands. Yes, the 572B doubles; /archives//html/Amps/1998-10/msg00426.html (8,865 bytes)
5. [AMPS] AL-811 (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 28 Oct 1998 08:09:37 -0800; Since they use identical filaments, the emission of an 811A is the same as the emission of a 572B. (The Mu is also the same.) Overdriving a thoriated tungsten cathode does not shorten the emissive l; /archives//html/Amps/1998-10/msg00427.html (8,380 bytes)
6. [AMPS] AL-811 (score: 1): Author: zeitler@ibm.net (zeitler@ibm.net); Date: Wed, 28 Oct 1998 08:53:44 -0800; Yes the 572s will certainly handle more drive. Page 35-8 of the 1994 ARRL Handbook states that for a pair of 572s operating at 2400 Ep, with an Ip of 500 mA, power out should be ~ 600 watts with 100; /archives//html/Amps/1998-10/msg00431.html (8,905 bytes)
7. [AMPS] AL-811 (score: 1): Author: zeitler@ibm.net (zeitler@ibm.net); Date: Wed, 28 Oct 1998 08:55:44 -0800; Forgot to add that the key with the AL811 is that it is power supply limited. Even by driving the trio of 572s with 100 watts you will not see anymore power out. At least i didn't in the 3 and 4 hole; /archives//html/Amps/1998-10/msg00432.html (9,040 bytes)
8. [AMPS] AL-811 (score: 1): Author: RFpower@radiodan.com (Radiodan W7RF); Date: Wed, 28 Oct 1998 10:47:01 -0800; Hi Doug and the boys, I never understand why guys get the cheapest amp known to mankind and then want to press it for more than it was designed for? Use it for the power it will put out safely and sa; /archives//html/Amps/1998-10/msg00435.html (9,792 bytes)
9. [AMPS] AL-811 (score: 1): Author: Doug Person" <w4dxv@ibm.net (Doug Person); Date: Wed, 28 Oct 1998 15:51:53 -0500; Well Dan, cheap is good when you don't have much money. I wish I could afford an Alpha or one of those killer Henry amps. No can do. I've actually had several Ameritron amps - all bought used and all; /archives//html/Amps/1998-10/msg00436.html (8,925 bytes)
10. [AMPS] AL-811 (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Wed, 28 Oct 98 16:54:01 -0600; I think Dan's point was that if you buy a cheap amp, realize what you are getting and don't try to push or massage it to perform like a big amp. If you want big amp performance, you gotta spend the; /archives//html/Amps/1998-10/msg00438.html (10,350 bytes)
11. [AMPS] AL-811 (score: 1): Author: RFpower@radiodan.com (Radiodan W7RF); Date: Wed, 28 Oct 1998 15:19:17 -0800; Hi Doug, I DO understand, believe me! What I meant was for you to use an amplifier in a resonable fashion as per what it is. Recognize that and don't push it. Not everyone has extra money, I understa; /archives//html/Amps/1998-10/msg00439.html (10,446 bytes)
12. [AMPS] AL-811 (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Thu, 29 Oct 1998 01:58:34 -0500; i MUST be missing something here. If you could afford all those other amps why are you using a sweep tube amp toy? For crying out loud, you can pick up a fully operational SB-200 for $250 if your not; /archives//html/Amps/1998-10/msg00450.html (10,458 bytes)
13. [AMPS] AL-811 (score: 1): Author: km1h@juno.com (km1h@juno.com); Date: Thu, 29 Oct 1998 01:50:36 -0500; On Wed, 28 Oct 1998 10:47:01 -0800 "Radiodan W7RF" <RFpower@radiodan.com> writes: Except between the ears of some wannabe QRO types. Ham lore has always stressed running tubes well over ratings...rea; /archives//html/Amps/1998-10/msg00451.html (8,871 bytes)
14. [Amps] AL-811 (score: 1): Author: "Ray" <w8cnl@mindspring.com>; Date: Wed, 31 Dec 2003 15:02:21 -0500; Had a tube short. Also took out part # 104-0150, 1.5 ohm resistor. Replaced all three tubes and the above parts. Amplifier is working OK (output vs input) except the grid current pins the meter now,; /archives//html/Amps/2003-12/msg00493.html (7,083 bytes)
15. Re: [Amps] AL-811 (score: 1): Author: R.Measures <r@somis.org>; Date: Wed, 31 Dec 2003 15:49:23 -0800; ** WHAT WAS WRONG WITH THE 3, ORIGINAL TUBES? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps; /archives//html/Amps/2003-12/msg00496.html (6,575 bytes)
16. Re: [Amps] AL-811 (score: 1): Author: R.Measures <r@somis.org>; Date: Thu, 1 Jan 2004 03:45:06 -0800; ** Do you mean a grid-filament short? Do you see springs floating around in the bottom of the glass envelope? _______________________________________________ Amps mailing list Amps@contesting.com htt; /archives//html/Amps/2004-01/msg00003.html (7,407 bytes)
17. Re: [Amps] AL-811 (score: 1): Author: Mark S Graalman <wb8jkr@juno.com>; Date: Thu, 1 Jan 2004 06:57:11 -0500; Sounds like you may be checking a meter multiplier resistor instead of the grid meter shunt resistor. I'm guessing if that's the case your grid shunt resistor is either open, or very high in value. M; /archives//html/Amps/2004-01/msg00004.html (6,808 bytes)
18. [Amps] AL-811 (score: 1): Author: Tom Horton <k5iid@sbcglobal.net>; Date: Fri, 7 Sep 2012 17:48:31 -0700 (PDT); Earlier this week, I posted on here that my QSK device (QSK-1) was malfunctioning. Thanks for all the replies, but I was wrong. After further inspection, it now appears that it is indeed the AL-811.; /archives//html/Amps/2012-09/msg00123.html (7,845 bytes)

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