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References: [ +from:k3lr@k3lr.com: 68 ]

Total 68 documents matching your query.

41. Re: [Amps] HV Oil Filter Cap (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sat, 4 Jun 2011 09:13:25 -0500
Hello Paul: I saved this note from K9RS concerning Alpha 77 HV filter capacitors. It is worth trying Condenser Products and see if they still have this same unit. Let me know how you make out - I nee
/archives//html/Amps/2011-06/msg00041.html (8,157 bytes)

42. Re: [Amps] Ruberized silicon sheet (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sun, 21 Aug 2011 13:11:54 -0500
I get mine from McMaster Carr. Lots of choices here http://www.mcmaster.com/# 73, Tim K3LR I need some rubberized silicon to make a wafer clamp for a toroid. Does anyone know a retailer for something
/archives//html/Amps/2011-08/msg00127.html (8,680 bytes)

43. Re: [Amps] 8877 tubes (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Fri, 13 Jan 2012 12:38:48 -0600
Hi Peter: This company using 8877 tubes near your location, do you know the name of the Chinese company they are using for their 8877 tubes? 73, Tim K3LR There is a company near my location who repla
/archives//html/Amps/2012-01/msg00142.html (9,182 bytes)

44. Re: [Amps] Bird 43 slugs (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Wed, 30 May 2012 22:27:38 -0500
I would try again Tom. 61 pages downloaded here just now - no problem. 73, Tim K3LR --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On Behalf Of kf4uth@jun
/archives//html/Amps/2012-05/msg00361.html (8,663 bytes)

45. Re: [Amps] addendum to 8877 plate voltage post (score: 1)
Author: "Tim Duffy K3LR" <k3lr@k3lr.com>
Date: Sat, 30 Jun 2012 17:48:01 -0500
Hello Charles: I have had no trouble running 4100 VDC for plate voltage on the 8877. There are guys that run close to 5 KV. 73, Tim K3LR Forgot to add this in my last post about high 8877 anode volta
/archives//html/Amps/2012-06/msg00453.html (8,214 bytes)

46. Re: [Amps] 3-500Z quality and new 572B (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 9 Oct 2014 08:32:08 -0400
Hello Hsu, 572B tubes are in demand here in the USA. Many dealers have no stock and cannot make promises when more 572Bs will be available. So a new manufacture of quality 572B tubes would be welcome
/archives//html/Amps/2014-10/msg00030.html (8,113 bytes)

47. [Amps] Alpha 77 meter and bezel needed (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sun, 12 Mar 2017 21:32:51 -0400
I need a PLATE meter - right side of amp - one ampere full scale. Made by MODUTEC. Also the mounting BEZEL that holds the meter on to the front panel. Any leads, info, or used parts? Thanks and 73 Ti
/archives//html/Amps/2017-03/msg00090.html (6,589 bytes)

48. [Amps] High temp magnet wire? (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sun, 2 Dec 2018 11:20:35 -0500
Looking for #20 high temperature magnet wire - sometimes referred to as Thermaleze. Any ideas? Need high temp rating for a plate choke rebuild. 73 Tim K3LR ___________________________________________
/archives//html/Amps/2018-12/msg00002.html (6,426 bytes)

49. [Amps] Thanks for the help! (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 4 Dec 2018 22:12:11 -0500
Lots of great info on magnet wire from the amps gang! Thanks for all the emails! 73 Tim K3LR _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contest
/archives//html/Amps/2018-12/msg00026.html (6,716 bytes)

50. [Amps] Plate choke design L? (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 6 Dec 2018 22:11:50 -0500
For best plate choke performance on 160 meters - what is the inductance that results in best 160 meter amplifier performance? Using a 8877 tube here. 73 Tim K3LR _____________________________________
/archives//html/Amps/2018-12/msg00038.html (6,535 bytes)

51. Re: [Amps] GS35B Amps Common Problem / few more comments (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 5 Nov 2019 21:34:44 -0500
Hello Jim, I agree - the 8877 - 3CX1500 is a VERY good Ham Radio tube. I have several in service here at K3LR that are 30 years plus years old. 18 amplifiers here using 8877s that make 1500 watts out
/archives//html/Amps/2019-11/msg00038.html (8,464 bytes)

52. Re: [Amps] Amp causing RFI (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 4 Feb 2020 19:32:45 -0500
Hello Mark, I am confused. What does a connection to earth ground have to do with ground loops? 73 Tim K3LR What having a decent ground does is eliminate the possibility of ground loops provided the
/archives//html/Amps/2020-02/msg00025.html (10,051 bytes)

53. Re: [Amps] Amp causing RFI (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Tue, 4 Feb 2020 22:20:54 -0500
Hello Mark: What you are doing (and suggesting others do) with the AC ground to break it is not right. It violates the NEC code and is very unsafe. Please refer to the NEC. What is posted here on the
/archives//html/Amps/2020-02/msg00031.html (12,521 bytes)

54. Re: [Amps] Alpha 87A Won't Transmit (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Fri, 9 Apr 2021 08:22:43 -0400
Hello Ron: There are 100's of PL-259's here at K3LR soldered that way - and they work perfect. No failures in over 40 years of doing this method shown to me by N4AR. Best of all the dielectric never
/archives//html/Amps/2021-04/msg00050.html (11,478 bytes)

55. Re: [Amps] Triode Amps (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 2 Dec 2021 16:19:09 -0500
My favorite triode for 1500 watts all day is a single 8877. 4KV and 30 watts drive. Used 8877s exist and are more than capable for long lives. Some of the 8877s at K3LR have date codes from the 70s..
/archives//html/Amps/2021-12/msg00016.html (9,473 bytes)

56. Re: [Amps] WTB fil transformer for 8877 (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Thu, 2 Dec 2021 21:20:06 -0500
I would start here: https://harbachelectronics.com/ Might need "contact us" 73 Tim K3LR Hello all, Looking for a filament transformer for an 8877/3cx1500. Eimac specs say 5 volts @ 10.5 amps. Please
/archives//html/Amps/2021-12/msg00024.html (7,882 bytes)

57. Re: [Amps] AL82 pi network C2 failure (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Wed, 8 Dec 2021 04:40:52 -0500
Hello Robert I would suggest a longer TX delay. With the open frame T/R relays more like 15 or 20 mS should work better 73 Tim K3LR Initial arc(s) occurred with the phased HF2V array on 80 meters (HF
/archives//html/Amps/2021-12/msg00064.html (10,463 bytes)

58. Re: [Amps] FW: SB220 - 10 Metre input coil adjustment (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sat, 1 Jan 2022 23:01:26 -0500
So two 3-500Z tubes give about 50 ohms feedpoint Z. W1QJ can correct if need be. So take OUT the tubes - put IN a 50 ohm non inductive resister there. You know where it goes? Then use the RIGEXPERT a
/archives//html/Amps/2022-01/msg00009.html (12,593 bytes)

59. Re: [Amps] Bad 8877? (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Sat, 1 Jan 2022 23:12:58 -0500
I have a 8877 tube tester built by W3YQ and designed with help from W8ZR. I have 25 8877 amplifiers here. If you want to send it here - I will test for you Dick 73 Tim K3LR My HB 6M amp now blows the
/archives//html/Amps/2022-01/msg00011.html (7,727 bytes)

60. Re: [Amps] 8877 (score: 1)
Author: "Tim Duffy" <k3lr@k3lr.com>
Date: Mon, 24 Jan 2022 19:11:01 -0500
I have 25 amplifiers here that use 8877s. It is a really good tube for amateur use at 1500 watts output. Some of my amplifiers have 8877s with date codes in the 1970s and they are still going strong.
/archives//html/Amps/2022-01/msg00079.html (8,512 bytes)

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