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References: [ +from:al.dolgosh@hamradio.org: 23 ]

Total 23 documents matching your query.

1. Re: [Amps] tube cooling (score: 1)
Author: "Alex Dolgosh" <al.dolgosh@hamradio.org>
Date: Sun, 15 Feb 2004 09:20:40 -0500
Unless you have air leaking in from other sources, all the air has to come through the anode - so the amount of cold air getting to the lower anode and filament/ceramic seal will be the same amount a
/archives//html/Amps/2004-02/msg00115.html (9,486 bytes)

2. Re: [Amps] SB-200 80 Meter dilemma (score: 1)
Author: "Alex Dolgosh" <al.dolgosh@hamradio.org>
Date: Sun, 29 Feb 2004 10:23:24 -0500
Take a real good look at the plate RF choke - you may find it has been overheated and there are more than a few turns that are shorted together because the insulation has melted off the wire. That wo
/archives//html/Amps/2004-02/msg00305.html (10,360 bytes)

3. Re: [Amps] Re: Eimac 5-500A (score: 1)
Author: "Alex Dolgosh" <al.dolgosh@hamradio.org>
Date: Sun, 29 Feb 2004 12:00:24 -0500
I am directly sending you two pdf files with data from the 1967 Eimac Power Grid Tubes Reference Catalog. Sorry for the large files - hope this is helpful to you. the ________________________________
/archives//html/Amps/2004-02/msg00310.html (7,648 bytes)

4. Re: [Amps] HF and 4cx250b's (score: 1)
Author: "Alex Dolgosh" <al.dolgosh@hamradio.org>
Date: Thu, 15 Jul 2004 19:55:38 -0400
I built an HF amp back in 1970 with four 4CX250B's in parallel. The tank circuit was a B&W 851 (I think) bandswitching assembly and vacuum variables for tuning and loading. The input circuit was pass
/archives//html/Amps/2004-07/msg00089.html (9,126 bytes)

5. [Amps] Dentron MLA-2500 (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sat, 15 Jan 2005 22:56:58 -0500
I just acquired an excellent MLA-2500. While I will probably run it on the HF bands for a while, I am interested in pulling the entire RF deck and replacing it with something that will give me a kW o
/archives//html/Amps/2005-01/msg00287.html (6,560 bytes)

6. Re: [Amps] Dentron MLA-2500 (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sun, 16 Jan 2005 09:19:48 -0500
Let me clarify my question - I intend to pull the entire RF deck out. I don't intend to build an amp around the obsolete 8875s already there. The 8875s will be spares for my exixting homebrew 6 meter
/archives//html/Amps/2005-01/msg00297.html (9,061 bytes)

7. Re: [Amps] Dentron MLA-2500 (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sun, 16 Jan 2005 20:18:33 -0500
I have the same problem - please give me the same solution. Thanks, Al - K8EUR -- Original Message -- From: "Dudley Hurry" <jhurry@austin.rr.com> To: "Rick Bullon" <kc5ajx@hotmail.com>; <amps@contest
/archives//html/Amps/2005-01/msg00314.html (10,277 bytes)

8. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Fri, 4 Feb 2005 19:03:55 -0500
A 10 dB increase in power will be propagated as a 10 dB increase - regardless of the state of the ionosphere, antennas, locations, etc. Instantaneous or rapid cyclical changes in propagation (QSB) ca
/archives//html/Amps/2005-02/msg00124.html (10,534 bytes)

9. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Fri, 4 Feb 2005 19:29:40 -0500
No! An improvement from zero dB to 10 dB is still 10 dB. It doesn't matter if you went from below the noise to above the noise - it is still 10 dB. Let's not start equating real numbers to "percent i
/archives//html/Amps/2005-02/msg00128.html (9,560 bytes)

10. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sat, 5 Feb 2005 07:21:31 -0500
The original subject was "why does a 10 dB increase in power seem to be greater when measured by a receiver S-meter". An answer was given indicating that propagation conditions, antennas, etc all hav
/archives//html/Amps/2005-02/msg00139.html (10,470 bytes)

11. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sat, 5 Feb 2005 07:25:06 -0500
-- Original Message -- From: "R. Measures" <r@somis.org> To: "Radioal" <al.dolgosh@hamradio.org> Cc: <amps@contesting.com>; "Ian White, G3SEK" <g3sek@ifwtech.co.uk> Sent: Saturday, February 05, 2005
/archives//html/Amps/2005-02/msg00140.html (9,581 bytes)

12. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sat, 5 Feb 2005 16:51:25 -0500
-- Original Message -- From: "R. Measures" <r@somis.org> To: "Radioal" <al.dolgosh@hamradio.org> Cc: <amps@contesting.com>; "Ian White, G3SEK" <g3sek@ifwtech.co.uk> Sent: Saturday, February 05, 2005
/archives//html/Amps/2005-02/msg00158.html (9,538 bytes)

13. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sat, 5 Feb 2005 18:33:33 -0500
Thse are the same formulas - one stated in terms of power and one in terms of voltage. Al - K8EUR -- Original Message -- From: "hermans" <on4kj@skynet.be> To: "'David Kirkby'" <david.kirkby@onetel.ne
/archives//html/Amps/2005-02/msg00164.html (13,205 bytes)

14. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sat, 5 Feb 2005 22:19:02 -0500
I am not questioning the fact that this was measured - only the basis for believing that what was measured had no other explanation than to disprove physical law. I suggest that something else may be
/archives//html/Amps/2005-02/msg00169.html (11,107 bytes)

15. Re: Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sun, 6 Feb 2005 00:55:03 -0500
The formulas - as stated - are simple ratios, and will determine delta dB between two voltages or two power levels when they are the only variables. There are no other variable in those equations. If
/archives//html/Amps/2005-02/msg00177.html (12,446 bytes)

16. Re: [Amps] 10 DB increase (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sun, 6 Feb 2005 06:53:21 -0500
Again.... until anomalies are explained, they are just that. That's why we have phrases such as "observable phenomena". Imagine the plight of theoretical physicists, like Einstein, who posulated his
/archives//html/Amps/2005-02/msg00183.html (12,934 bytes)

17. Re: [Amps] close to off topic - how to read antenna R + jX ?? (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Sat, 26 Feb 2005 16:33:59 -0500
The impedance of an antenna in the real world is not 50 ohms resistive, which is what the meter is telling you when you attach the "calibrated" termination resistor. Impedance is a complex unit, cons
/archives//html/Amps/2005-02/msg00866.html (8,528 bytes)

18. Re: [Amps] nylons (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Tue, 15 Mar 2005 19:25:30 -0500
Polypropylene would be an excellent choice. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-03/msg00351.html (12,718 bytes)

19. Re: [Amps] Standby tubes (was: Even more power solid-state amp's) (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Fri, 1 Apr 2005 18:52:00 -0500
I think you are mixing memories of both VOA and WLW, which were both located north of Cincinnatti. _______________________________________________ Amps mailing list Amps@contesting.com http://lists.c
/archives//html/Amps/2005-04/msg00030.html (14,767 bytes)

20. Re: [Amps] Dentron ML2500 on 50MHz (score: 1)
Author: "Radioal" <al.dolgosh@hamradio.org>
Date: Tue, 5 Apr 2005 17:38:43 -0400
Actually, the 8875 tubes are no longer available. I built a 6-meter amp with a pair of 8875s years ago, using Dentron MLA2500 components when they were available fairly cheap from Dentron. So, your p
/archives//html/Amps/2005-04/msg00114.html (8,830 bytes)

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