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References: [ +from:woodr90@gmail.com: 75 ]

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41. Re: [Amps] single phase into 3 phase transformer (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Wed, 21 Apr 2021 17:25:41 -0500
Bill, is the transformer delta-wye? wye-wye? delta-delta? etc. etc.... are two unique wires available per winding? are any windings center tapped? IF you are trying to wire in single phase and get th
/archives//html/Amps/2021-04/msg00095.html (8,552 bytes)

42. Re: [Amps] single phase into 3 phase transformer (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Wed, 21 Apr 2021 20:57:32 -0500
Bill, PLEASE take look on side of the transformer and tell us about the wiring / configuration Delta-Wye is a common configuration for three phase windings - it's on a tag on the transformer https://
/archives//html/Amps/2021-04/msg00099.html (15,554 bytes)

43. [Amps] HARRIS RF103 amp (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Wed, 5 May 2021 01:01:03 -0500
Have a manual from the "BAMA" manual web site. The pages there mention "Voltage Chart" but it's not included in pdf Contacted keepers of BAMA and indication was all that was available, is posted. Doe
/archives//html/Amps/2021-05/msg00021.html (6,865 bytes)

44. Re: [Amps] HARRIS RF103 amp (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Thu, 13 May 2021 14:17:54 -0500
UPDATE RF103 Amplifier There is error or inconsistency between the Schematic and the PCB layout drawing R17 <-> R37 and R18 <-> R38 are reversed on one of those drawings. I am adjusting Lower limit w
/archives//html/Amps/2021-05/msg00040.html (7,853 bytes)

45. [Amps] Alpha89 FOR SALE (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Sat, 5 Jun 2021 22:46:08 -0500
FOR SALE Alpha 89 Good set of Tubes installed The HV Diode bridge failed sometime in the past, replaced with four diode strings. The B+ RF Choke has been upgraded as seen in photos Tested amp (again)
/archives//html/Amps/2021-06/msg00000.html (6,661 bytes)

46. Re: [Amps] Cleaning open frame TR relay (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Wed, 30 Jun 2021 13:12:26 -0500
Mark besides cleaning, If the contacts have stuck or look pitted go to Newark webpage (or your favorite mail order), find equal and put on order. Never emery cloth, maybe for that contest emergency -
/archives//html/Amps/2021-06/msg00028.html (9,846 bytes)

47. Re: [Amps] MLA-2500 Tube Conversion (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Mon, 11 Oct 2021 12:17:54 -0500
https://w5aj.eqth.net/Rtubes.jpg Are the tubes in photo GI-7B? I don't find any markings on them but ham I bought from (decade ago perhaps) said GI-7B I'm asking because it's difficult to list these
/archives//html/Amps/2021-10/msg00037.html (10,350 bytes)

48. [Amps] FOR SALE PAIR GI-7B (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Mon, 11 Oct 2021 12:34:16 -0500
https://w5aj.eqth.net/Rtubes.jpg Pair Ham I bought them from said "Working" He is fellow member of local Midland radio club I'm not going to use them, been in storage for YEARS as is $50 OBO shipped
/archives//html/Amps/2021-10/msg00038.html (6,638 bytes)

49. Re: [Amps] FOR SALE PAIR GI-7B (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Mon, 11 Oct 2021 13:28:28 -0500
It's not personal web page space hosted on qth.com Photo is of two GI-7B Anyone interested or making offer, I can send photo direct 73 W5AJ The referred website turns up blocked as a dangerous websit
/archives//html/Amps/2021-10/msg00041.html (8,174 bytes)

50. Re: [Amps] MLA-2500 Tube Conversion (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Mon, 11 Oct 2021 19:02:52 -0500
Additionally Anyone located a supplier for the allen wrench head screws used to hold covers on?? Robert _______________________________________________ Amps mailing list Amps@contesting.com http://li
/archives//html/Amps/2021-10/msg00043.html (9,018 bytes)

51. Re: [Amps] MLA-2500 Tube Conversion (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Wed, 13 Oct 2021 02:48:30 -0500
Screw #6-32 Searched for Philips or Hex (ALLEN) head at one local hardware store, All too Long Quit driving around and checked other two hardware stores via internet and didnt look Hopeful https://sm
/archives//html/Amps/2021-10/msg00061.html (10,736 bytes)

52. Re: [Amps] QRO Technologies HF2000 plate choke, cont. (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Fri, 12 Nov 2021 18:25:31 -0600
I'm sold on the RF choke from RF Parts https://www.rfparts.com/rfc3.html Replaced RF choke (Mess) of Alpha 89 with this choke and performed great, all bands. Well not the CB band, didn't try that. 73
/archives//html/Amps/2021-11/msg00016.html (8,952 bytes)

53. Re: [Amps] Alpha 76PA Conversion - Drive Issue (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Wed, 1 Dec 2021 11:02:04 -0600
Steve, Have MLA2800 (converted MLA2500), it's still in the garage/tool room, it can do 1500watts out, CW (the power supply isn't good to maintain that!) standard 2xEmiac 3cx800 At one time, had Alpha
/archives//html/Amps/2021-12/msg00001.html (8,959 bytes)

54. Re: [Amps] Triode Amps (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Fri, 3 Dec 2021 00:22:19 -0600
Tim, do you initially check 8877 filament voltage? Monitor regularly? Robert W5AJ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai
/archives//html/Amps/2021-12/msg00028.html (10,114 bytes)

55. [Amps] AL82 pi network C2 failure (score: 1)
Author: "Robert W5AJ" <woodr90@gmail.com>
Date: Tue, 7 Dec 2021 14:52:53 -0600
Tom, could you forward photo of the Vacuum Variable modification? My AL82 has failed C2 in the output PI network. My hypothesis is while operating amp (and a prior command amp) on 80 meters, a failur
/archives//html/Amps/2021-12/msg00059.html (8,254 bytes)

56. Re: [Amps] AL82 pi network C2 failure (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Wed, 8 Dec 2021 01:31:52 -0600
Initial arc(s) occurred with the phased HF2V array on 80 meters (HF2V array not used on 40) Think a key is doesn't arc on other antennas/bands, initially. first amp that failed output loading capacit
/archives//html/Amps/2021-12/msg00062.html (9,415 bytes)

57. [Amps] Gigavac GH1 (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Fri, 10 Dec 2021 12:31:42 -0600
Decades ago, Gigavac offered a GH1 HAM a vacuum relay with 12Vdc coil Of interest, today Gigavac offers a GH1 with 12Vdc coil (HAM doesn't appear in part#) Seems like easy replacement for decades old
/archives//html/Amps/2021-12/msg00070.html (6,895 bytes)

58. [Amps] Gigavac GH1 mounting bracket (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Tue, 8 Feb 2022 18:28:15 -0600
Is there a source for a right angle mounting bracket for GH1 relay? (Does everyone retrofit with HB custom bracket?) 73 Robert W5AJ _______________________________________________ Amps mailing list A
/archives//html/Amps/2022-02/msg00002.html (6,333 bytes)

59. Re: [Amps] Western Electric (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Tue, 22 Mar 2022 18:20:49 -0500
Thanks Gary I wrote in comment section 3-500z RF tube would be excellent consideration. My guess they are doing glass type tubes 73 Robert _______________________________________________ Amps mailing
/archives//html/Amps/2022-03/msg00033.html (8,108 bytes)

60. [Amps] TUBES - excess to my needs (score: 1)
Author: Robert W5AJ <woodr90@gmail.com>
Date: Wed, 6 Apr 2022 01:46:12 -0500
About a decade ago, bought some tubes from a local ham who wasn't going to get around to building with them. Me too now. $20 to cover postage costs and they are yours. (can't attach photo due to list
/archives//html/Amps/2022-04/msg00000.html (6,211 bytes)

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