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Total 26 documents matching your query.

1. [Amps] Henry 2KD-5 bottom cover (score: 1)
Author: "Dave" <>
Date: Thu, 8 Sep 2011 15:48:11 -0700
My 2KD-5 is missing the bottom cover. Does anyone know if the original is solid or perforated? Also, If anyone has one that is available I would like to discuss buying it. Otherwise I will make one o
/archives//html/Amps/2011-09/msg00019.html (6,910 bytes)

2. Re: [Amps] Advice needed for SS amp (score: 1)
Author: "Dave Gow" <>
Date: Thu, 6 Jun 2013 09:50:44 -0700
I had one and it was 10 tubes. It worked fine and I never had any complaints. I gave it away when the tubes went soft and matched sets were no longer available. It was pretty to see some bright red a
/archives//html/Amps/2013-06/msg00115.html (10,816 bytes)

3. Re: [Amps] L4B connector (score: 1)
Author: "Dave Gow" <>
Date: Sun, 11 Aug 2013 08:31:29 -0800
I believe it is the same as the plugs Johnson used on the Viking Valiant and Ranger transmitters. Replicas are available from several vendors that serve users of these fine old AM transmitters. I hav
/archives//html/Amps/2013-08/msg00079.html (9,029 bytes)

4. Re: [Amps] [Bulk] Re: 572B - News? (score: 1)
Author: "Dave" <>
Date: Fri, 7 Nov 2014 11:24:57 -0800
The service bulletin was in the bias system for the FL-2100B. Improper bias triggered instability. There were not RF related changes.The FL-200Z has a different bias system but I don't remember if it
/archives//html/Amps/2014-11/msg00011.html (12,772 bytes)

5. [Amps] FW: [Bulk] Re: Ameritron Availability (score: 1)
Author: "Dave" <>
Date: Wed, 25 Feb 2015 09:42:32 -0800
HRO has the ALS-1300 in stock at three locations according to their web page. I suspect the Ameritron ALS line is being kept busy building the ALS-1306 since the ALS-1306 is the newer model with more
/archives//html/Amps/2015-02/msg00133.html (8,579 bytes)

6. Re: [Amps] [Bulk] Considering an ALS-1306 (score: 1)
Author: "Dave" <>
Date: Fri, 24 Apr 2015 12:46:37 -0700
I have an ALS-1306, one of the first 20 manufactured, and it is great! It has been flawless since I first turned it on in September of 2014. I usually run it at 1000 watts out on SSB but it will easi
/archives//html/Amps/2015-04/msg00155.html (8,945 bytes)

7. Re: [Amps] [Bulk] Re: Time for New Power Meter (score: 1)
Author: "Dave" <>
Date: Mon, 4 May 2015 10:02:56 -0700
I just did a search on the ARRL website QST archives using every key word(s) I could imagine. I could not find the referenced article. Perhaps someone else would have better luck. I would love to rea
/archives//html/Amps/2015-05/msg00055.html (12,127 bytes)

8. Re: [Amps] [Bulk] Re: Date Code Samsung 120 MFD 450 Volt Capacitors? (score: 1)
Author: "Dave" <>
Date: Mon, 11 May 2015 14:11:46 -0700
Better to find a friend with a Sprague T0-6 or earlier TO-? 73 Dave W7VM Hi If they are old make an EXT. circuit with soft start to test each, e.g a diode with 100 kOhm in series. Use a DMM to measur
/archives//html/Amps/2015-05/msg00108.html (10,709 bytes)

9. Re: [Amps] [Bulk] Re: Super Cathode Driven 4CX250B (score: 1)
Author: "Dave" <>
Date: Fri, 10 Jul 2015 18:37:37 -0700
Use WWll metal 6AG7s and invert them in circulating water in an old aquarium and driven by an aquarium pump. I read about this in CQ(?) during the 1950s. I read it in the local library since I lacked
/archives//html/Amps/2015-07/msg00030.html (8,629 bytes)

10. Re: [Amps] Bring a SB-220 Back To Life. (score: 1)
Author: "David Gow" <>
Date: Wed, 15 Jun 2016 15:30:11 -0700
Those tubes ae rated at 4000 volts absolute maximum according to Eimac data sheets.. Most companies ran them at about 2800. Henry was an exception, my Henry 3K-A uses a 4000 volt transformer with cho
/archives//html/Amps/2016-06/msg00058.html (9,486 bytes)

11. Re: [Amps] Henry 3K Bias Diode -- High Idle Current (score: 1)
Author: "David Gow" <>
Date: Wed, 23 Nov 2016 20:33:25 -0800
My 3k-A had a bad bias diode when purchased. It also had other minor problems but the bias diode was an easy fix as the equivalent is an NTE 5156A for about 79 cents at any electronics jobber. My loc
/archives//html/Amps/2016-11/msg00115.html (8,180 bytes)

12. Re: [Amps] Machlett 3-500Z tubes (score: 1)
Author: "David Gow" <>
Date: Fri, 25 Nov 2016 21:39:48 -0800
The Alpha/RKR website says they are not available at this time. Alpha tubes has matched pairs for $278, with 2 year warranty. I have purchased 2 sets and have had no issues. - Paul KW7Y _____________
/archives//html/Amps/2016-11/msg00120.html (9,592 bytes)

13. Re: [Amps] Machlett 3-500Z tubes (score: 1)
Author: "David Gow" <>
Date: Sat, 26 Nov 2016 11:22:41 -0800
Google Wikapedia for "RCA" and you will see a fascinating history. The current owner of the trademark is VOXX corporation (formerly Thomson) which uses it for many product lines. The french company "
/archives//html/Amps/2016-11/msg00130.html (9,257 bytes)

14. Re: [Amps] The cost of amplifiers, radios (score: 1)
Author: "David Gow" <>
Date: Sat, 3 Dec 2016 21:38:14 -0800
You can get a very nice Henry floor console amp with two working 3-500z tubes for about $1000. A new pair of 3-500zg tubes is $400 with a three year warrantee. If a Henry has the export/commercial po
/archives//html/Amps/2016-12/msg00049.html (10,634 bytes)

15. Re: [Amps] Idiosyncratic opinion on amp choices (score: 1)
Author: "David Gow" <>
Date: Mon, 19 Dec 2016 11:49:05 -0800
Where did you find a new AL-80A? The current model is the AL-80B and has many changes from the 80A. Also, the current list price at Ameritron for a 3-500ZG is $219.95. I am I misundersta
/archives//html/Amps/2016-12/msg00432.html (21,900 bytes)

16. Re: [Amps] TRANS WORLD TW500A-RM (score: 1)
Author: "David Gow" <>
Date: Wed, 21 Dec 2016 12:08:21 -0800
For any that are interested I sent a manual and some information attachment to Emile that covers my TW1000A that is basically two TW500A amplifiers in one cabinet with input and output combiners. Tra
/archives//html/Amps/2016-12/msg00434.html (8,739 bytes)

17. Re: [Amps] TRANS WORLD TW500A-RM (score: 1)
Author: "David Gow" <>
Date: Wed, 21 Dec 2016 16:40:56 -0800
I think there is some sort of connection but the Transworld TW1000A and TW500A are totally different beasts than the Metron 1000B if that is what you are referring to. The TW1000A and TW500A are larg
/archives//html/Amps/2016-12/msg00437.html (12,151 bytes)

18. Re: [Amps] 30L1 keying (score: 1)
Author: "David Gow" <>
Date: Tue, 27 Dec 2016 16:27:16 -0800
If you want plug and play for virtually any transceiver or transmitter to any amplifier the Ameritron ARB-704 for about $40 dollars does it perfectly. I am using one with my KX3/KPXA100 driving a Hen
/archives//html/Amps/2016-12/msg00453.html (8,119 bytes)

19. Re: [Amps] Memories of Many 11 Meter Amps (score: 1)
Author: "David Gow" <>
Date: Sun, 26 Feb 2017 10:52:48 -0800
I bought a Galaxy 2000 when I first got my general ticket. It sat gathering dust on the consignment shelf at the old Amateur Radio Supply in Seattle and no wanted it so I made a low ball offer and go
/archives//html/Amps/2017-02/msg00199.html (11,106 bytes)

20. Re: [Amps] 240 Volt Blowers needed (score: 1)
Author: "David Gow" <>
Date: Sun, 19 Mar 2017 11:44:23 -0700
Jim, A few months ago when I needed a blower for my Henry 3K-A (pair at 3-500z ran very hard at 4000 volts) I emailed Ted Henry at Henry Radio and he recommended the Dayton 1TDP6 and yes, it is a 240
/archives//html/Amps/2017-03/msg00110.html (8,235 bytes)

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