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References: [ +from:wa9mag@ameritech.net: 9 ]

Total 9 documents matching your query.

1. [Amps] Alpha 87A Tubes (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Sat, 29 Dec 2007 12:31:22 -0600
I copied the following from the Alpha website. The Alpha 87A, 89 and 86 were designed to use the YC-238 tube which is an Eimac 3CX800A7 that has been screened for low grid current. Replacing one or b
/archives//html/Amps/2007-12/msg00267.html (7,007 bytes)

2. [Amps] Alpha 87A Tubes 3CX800A7 and the 3CX P 800A7 (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Mon, 31 Dec 2007 16:09:18 -0600
Jerry, My 87A draws around 35 to 50 ma grid current for 1,500 watts out. Before installing AlphaMax, sometimes it would get into the yellow. Now, with AlphaMax it is more well behaved. I don't know m
/archives//html/Amps/2007-12/msg00295.html (8,392 bytes)

3. [Amps] Alpha &&DX Conversion (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Tue, 4 Sep 2012 20:02:49 -0500
I have recently picked up an Alpha 77DX and wonder what the general consensus is about adding a second tube. According to the N4UQ website, my amp qualifies. However, the power transformer seems a li
/archives//html/Amps/2012-09/msg00045.html (7,234 bytes)

4. [Amps] 8877 Grid Current (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Tue, 18 Sep 2012 20:39:26 -0500
For a good number of years, I had a Henry 3K Classic export with a single 8877. Peak power (fully tuned) occurred when the grid current was low, around 10 to 20 MA. I recently picked up an Alpha 77DX
/archives//html/Amps/2012-09/msg00250.html (7,060 bytes)

5. [Amps] Alpha && Screws (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Tue, 9 Dec 2014 11:54:38 -0600
Speaking of screws what are the screws on the front panel of the Alpha 77DX. There are three Philips screws on both sides, I am missing one. Does anybody know where t get one? Larry, WA9MAG _________
/archives//html/Amps/2014-12/msg00045.html (6,427 bytes)

6. [Amps] Alpha 77 DX Meter Lights (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Fri, 26 Dec 2014 12:20:44 -0600
Does anybody have a procedure for replacing the meter bulbs in the Alpha 777DX? Larry, WA9MAG _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contes
/archives//html/Amps/2014-12/msg00106.html (6,293 bytes)

7. [Amps] NCL-2000 (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Thu, 21 Jan 2016 11:33:07 -0600
I am going to replace the power supply electrolytics in a National NCL-2000 soon. The amplifier is in cherry condition and I would like to recap it as close to original as possible. Are there direct
/archives//html/Amps/2016-01/msg00059.html (6,929 bytes)

8. [Amps] Alpha 9500 Idling Current (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Thu, 29 Dec 2016 11:24:32 -0600
Paul, My Alpha 9500 runs 232 ma idling current with 3535 volts on the plate no load and 3420 volts on the plate when idling. Larry, WA9MAG _______________________________________________ Amps mailing
/archives//html/Amps/2016-12/msg00510.html (6,411 bytes)

9. [Amps] Alpha 9500 update and repair (score: 1)
Author: "Larry P. Greenberg" <wa9mag@ameritech.net>
Date: Tue, 17 Oct 2017 19:31:48 -0500
I am getting ready to send my early model 9500 in for update and repair. I would like to get an idea of your experiences with Alpha factory service and also Brads service, K0HM. Which is better, turn
/archives//html/Amps/2017-10/msg00129.html (6,850 bytes)

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