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1. Re: [Amps] Alpha 87A hardfail 99 (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Sun, 26 Feb 2017 12:30:31 -0700
Hello Hawk, To clear a Fault 99 on an Alpha 87A amplifier with a PC connected to serial port: Amp plugged into AC but not turned on. Type in the following commands and enter them for each new line. Y
/archives//html/Amps/2017-02/msg00201.html (9,097 bytes)

2. Re: [Amps] Alpha 77 meter and bezel needed (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Mon, 13 Mar 2017 09:48:20 -0600
There are two ammeters in stock (NOS) on the Alpha factory web store. https://www.alpharfsystems.com/?ec_store=meter-alpha-77sx-77dx-ammeter-black-case Not sure if the meters in the Alpha store are O
/archives//html/Amps/2017-03/msg00092.html (7,691 bytes)

3. Re: [Amps] Alpha 99 (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Wed, 26 Apr 2017 11:47:21 -0600
It never hurts to ask Alpha for information instead of speculations... The early 99 amps used a board at the front of the bandswitch (inside the front subchassis) to turn on the plate choke relay tha
/archives//html/Amps/2017-04/msg00305.html (9,911 bytes)

4. Re: [Amps] Alpha 99 (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Wed, 26 Apr 2017 12:51:13 -0600
Merv, that may have been the case a year or two ago when the "front office" was deflecting calls, but I'm at Alpha right now and we answer the telephone every day. I've been working here since 1998 w
/archives//html/Amps/2017-04/msg00308.html (7,983 bytes)

5. Re: [Amps] Status of Alpha Amps? (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Fri, 29 Sep 2017 08:43:38 -0600
Alpha RF Systems acquired Alpha Amplifiers from RKR Designs over a year ago. We are located in the same place in Longmont, CO that we have been in since 2010, still building new 9500, 8410 and 8406 a
/archives//html/Amps/2017-09/msg00065.html (8,461 bytes)

6. Re: [Amps] Alpha (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Wed, 4 Oct 2017 09:04:25 -0600
I figured out the life of a vacuum relay (RJ1, HC1, GH1, all rated for 2 million cycles) in QSK contesting in CQing and also S&P. When running (holding a freq and calling CQ) you get about 20,000 QSO
/archives//html/Amps/2017-10/msg00043.html (8,340 bytes)

7. Re: [Amps] power limiting in 8410 amps? (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Fri, 2 Nov 2018 14:34:09 -0600
There is no intentional OUTPUT power limiting circuit in the Alpha 8410 amplifiers. The 8410 firmware WILL put the amp in standby if the DRIVE power exceeds 75w for too long, to protect the input cir
/archives//html/Amps/2018-11/msg00021.html (10,746 bytes)

8. Re: [Amps] power limiting in 8410 amps? (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Wed, 7 Nov 2018 09:21:26 -0700
Production 8410 amps have the screen voltage set to 225v. Some very early production amps were set to 200. The tube operating bias is then adjusted for 200ma idle Ip and an 8410 can easily get 1500+
/archives//html/Amps/2018-11/msg00035.html (9,823 bytes)

9. Re: [Amps] about Alpha Rf Systems (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Sun, 3 Mar 2019 20:59:36 -0700
The server that forwards the email was moved and updated and for a few weeks we weren't getting emails from some other addresses. It should be working now, or you can send directly to alphaamps1@gmai
/archives//html/Amps/2019-03/msg00006.html (8,421 bytes)

10. Re: [Amps] about Alpha Rf Systems (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Mon, 4 Mar 2019 15:54:19 -0700
The fans used at Alpha are the 71 CFM, either the 115 or 230 version. The 110 CFM was used on commercial versions of some Alpha amps. They should blow air INTO the amp so the air flow is "in series"
/archives//html/Amps/2019-03/msg00009.html (8,684 bytes)

11. Re: [Amps] ALPHA 9500 REMOTE - FLICKERING SCREEN (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Wed, 8 May 2019 08:13:23 -0600
Noll, You are using the early, first version of the remote software for the 9500. The later version is v1.4, it is on this page of the Alpha web site: https://www.alpharfsystems.com/?p=1480 Scroll to
/archives//html/Amps/2019-05/msg00011.html (8,313 bytes)

12. Re: [Amps] Alpha 9500 questions (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Mon, 27 Jul 2020 09:58:31 -0600
Some Alpha 9500 info: Alpha 9500 Tubedeck Blower Types by Serial Number: 950012400632 Last old blower (AC Motor) 950012400633 and on New Papst DC blower The chassis sheet metal is significantly diffe
/archives//html/Amps/2020-07/msg00026.html (10,091 bytes)

13. Re: [Amps] Alpha 9500 questions (score: 1)
Author: GWP <gm5bkc@gmail.com>
Date: Mon, 27 Jul 2020 11:54:37 -0600
Clarification to 9500 Firmware numbers: Some of the 9500 firmware files have been renamed so they all have the same version number, and at other times the latest files have been loaded with the origi
/archives//html/Amps/2020-07/msg00027.html (7,762 bytes)

14. Re: [Amps] 4 KW? (score: 1)
Author: Glenn AE0Q <gm5bkc@gmail.com>
Date: Thu, 23 Jun 2022 19:20:20 -0600
Man, I hope those tubes don't glow !!! Glenn AE0Q _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2022-06/msg00104.html (7,769 bytes)

15. Re: [Amps] 4 KW? (score: 1)
Author: Glenn AE0Q <gm5bkc@gmail.com>
Date: Fri, 24 Jun 2022 13:00:44 -0600
The Alpha 8410 uses two Chinese made 4CX1500B tubes, and the Alpha 9500 uses one Chinese made 3CX1500A7. Glenn AE0Q _______________________________________________ Amps mailing list Amps@contesting.c
/archives//html/Amps/2022-06/msg00115.html (7,813 bytes)

16. [Amps] Switch for Alpha 87A (score: 1)
Author: Glenn AE0Q <gm5bkc@gmail.com>
Date: Thu, 18 Aug 2022 13:21:01 -0600
87A OPR/STBY, HI/LO Alpha p/n SQR-X109 Digikey EG1528-ND Mouser 612-R5CBLKBLKEF0 87A ON, OFF Alpha p/n SQR-X110 Digikey R5EBLKBLKEF0-ND Glenn AE0Q _______________________________________________ Amps
/archives//html/Amps/2022-08/msg00020.html (7,071 bytes)

17. [Amps] Switch for Alpha 87A (score: 1)
Author: Glenn AE0Q <gm5bkc@gmail.com>
Date: Thu, 18 Aug 2022 13:30:14 -0600
If you send email to the Alpha Service email, I _DO_ answer it every day and have all that information. Glenn AE0Q _______________________________________________ Amps mailing list Amps@contesting.co
/archives//html/Amps/2022-08/msg00021.html (6,622 bytes)

18. [Amps] Alpha 86 (score: 1)
Author: Glenn AE0Q <gm5bkc@gmail.com>
Date: Tue, 8 Nov 2022 16:29:11 -0700
"ETO's documentation of the Alpha 86 is sketchy at best. The amp went through several re-designs during its production lifecycle, most changes of which are related to QSK performance and PIN diode pr
/archives//html/Amps/2022-11/msg00013.html (7,924 bytes)

19. [Amps] AE9K Alpha Monitoring Program Web Site? (score: 1)
Author: Glenn AE0Q <gm5bkc@gmail.com>
Date: Sun, 19 Nov 2023 08:27:17 -0700
The file is on the Alpha 8410 web page: https://www.alpharfsystems.com/?p=1467 You will need 7-Zip installed to extract it. Glenn AE0Q _______________________________________________ Amps mailing lis
/archives//html/Amps/2023-11/msg00028.html (6,642 bytes)

20. Re: [Amps] 8410 (score: 1)
Author: Glenn AE0Q <gm5bkc@gmail.com>
Date: Thu, 4 Apr 2024 16:32:14 -0600
The complete BOM (Bill Of Material) for boards inthe Alpha 8410 are posted on the 8410 page of the Alpha RF Systems web site. I don't know why that particular part is mentioned as a microprocessor, b
/archives//html/Amps/2024-04/msg00008.html (7,734 bytes)

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