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Total 33 documents matching your query.

21. Re: [Amps] Alpha vs Henry (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Wed, 6 Apr 2011 14:35:18 -0700
I run the AL-1500 blower at max speed. No problems after many years of RTTY contests. I run 750 ma plate current on RTTY. Dave Hachadorian, K6LL Yuma, AZ Can anyone tell me how much power an AL-1500
/archives//html/Amps/2011-04/msg00254.html (10,733 bytes)

22. Re: [Amps] Risks from continuous discharge of high voltage ?? (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Sun, 3 Jul 2011 13:03:44 -0700
Santa Claus says, "You'll shoot your eye out, kid." Dave Hachadorian, K6LL Big Bear Lake, CA I have a transformer with rectifiers. Weighs several hundred pounds and is in a tub with oil. It had an ex
/archives//html/Amps/2011-07/msg00020.html (10,264 bytes)

23. Re: [Amps] 4-1000 GG project (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Sun, 10 Jul 2011 15:51:21 -0700
Interesting. Here is 68uf at 4500v for $55, delivered: http://cgi.ebay.com/450V-680uf-Electrolytic-Capacitor-Radial-35x60mm-x-1pc-/230633071893?pt=Vintage_Electronics_R2&hash=item35b2cd6515 Dave Hac
/archives//html/Amps/2011-07/msg00099.html (7,298 bytes)

24. Re: [Amps] best deal for Mallory caps? (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Fri, 25 Nov 2011 10:31:50 -0700
I don't know if the physical configuration of these will work for you, but here's a good data point on filter caps: http://www.ebay.com/itm/450V-680uf-Electrolytic-Capacitor-Radial-35x60mm-x-1pc-/230
/archives//html/Amps/2011-11/msg00135.html (8,864 bytes)

25. Re: [Amps] Ducting Suggestion (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Tue, 20 Mar 2012 12:58:39 -0700
4 inch dryer hose comes in a variety of materials. There are various connectors for it, including quick-disconnects. Google search shows all kinds of gizmos. Dave Hachadorian, K6LL Yuma, Arizona SLOO
/archives//html/Amps/2012-03/msg00214.html (8,317 bytes)

26. Re: [Amps] amp cooling / triodes vs tetrodes (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Wed, 4 Apr 2012 09:08:40 -0700
While we are on the subject of EBS, let me add one item. I put an Ameritron EBS-1 Bias Switcher into my AL-1500, and it worked great. On rare occasions, with two loud blowers operating, the EBS would
/archives//html/Amps/2012-04/msg00050.html (9,433 bytes)

27. Re: [Amps] Tubes vs. Solid State (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Wed, 2 May 2012 07:09:49 -0700
Or, use methanol (BP=148F) or acetone (BP=133F). Dave Hachadorian, K6LL Yuma, Arizona Regarding vapor phase cooling, I had to smile when I read Dick's suggestion to evacuate the cooling system to 1 P
/archives//html/Amps/2012-05/msg00053.html (9,788 bytes)

28. Re: [Amps] Multiple Amplifier Switching Box (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Thu, 23 Aug 2012 10:58:08 -0700
I have run an AL-1500 and SB-220 in series. Absolutely do not do this if the second amp in line is equipped with QSK circuitry, because RFI from the high level of other-band power may switch its rela
/archives//html/Amps/2012-08/msg00367.html (10,880 bytes)

29. [Amps] AL-1500 filter caps (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Wed, 17 Oct 2012 21:41:31 -0700
A friend's AL-1500 started blowing fuses after the two minute timeout. I isolated the problem to the filter cap board. After pulling the board, I found that two or three caps had vented their guts on
/archives//html/Amps/2012-10/msg00099.html (7,657 bytes)

30. Re: [Amps] High grid current Titan 425 (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Fri, 26 Oct 2012 21:01:38 -0700
I don't know beans about the Titan 425, but isn't there a glitch diode, or a grid metering resistor, which, if they blow, cause cathode current to show up as grid current on the meter? This rings a b
/archives//html/Amps/2012-10/msg00174.html (9,375 bytes)

31. Re: [Amps] High grid current Titan 425 (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Sat, 27 Oct 2012 11:41:59 -0700
I have a big hand-written note in my AL-1500 manual that says "If metering is screwed up after an amplifier 'event,' check the diode that goes between B-minus and ground." Dave Hachadorian, K6LL Yuma
/archives//html/Amps/2012-10/msg00184.html (8,235 bytes)

32. Re: [Amps] Ten Tec Titan 425 Options (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Fri, 9 Nov 2012 09:23:49 -0700
I just replaced the filter cap board in a friend's AL-1500. It was $180 for the fully populated board. I t was pretty small. Maybe it will fit. It is set up for full wave bridge. There is a separate
/archives//html/Amps/2012-11/msg00072.html (11,087 bytes)

33. Re: [Amps] Ameritron AL-1500 inquiry (score: 1)
Author: "Dave Hachadorian" <k6ll@arrl.net>
Date: Thu, 24 Jan 2013 15:50:27 -0700
You could try electrically cleaning the relays, shown here, near the bottom of the page: http://www.w8ji.com/relay_cleaning_and_life.htm I think my AL-1500 has just started exhibiting the same proble
/archives//html/Amps/2013-01/msg00146.html (8,975 bytes)

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