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Total 75 documents matching your query.

41. Re: [Amps] "N, " "TNC" and "BNC" connectors are rated at 500 Watts and work at 1, 000 Watts as log as the load is good.. (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Wed, 13 Nov 2013 09:24:04 -0700
-- Original Message -- From: "Dr. David Kirkby" <drkirkby@gmail.com> To: "Roger (K8RI)" <k8ri@rogerhalstead.com> Cc: "amps" <amps@contesting.com> Sent: Monday, November 11, 2013 5:46 AM Subject: Re:
/archives//html/Amps/2013-11/msg00282.html (11,968 bytes)

42. Re: [Amps] UHF Connectors & Crimpers: WHICH/WHAT SOURCE (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Wed, 13 Nov 2013 19:12:17 -0700
Pete & Everyone, Maybe I've missed something along the way but is there a list that calls out what die goes with what RG number? The only one I know for sure is the one for LMR-400. I now have 2 crim
/archives//html/Amps/2013-11/msg00302.html (11,901 bytes)

43. Re: [Amps] Commander HF-1250 problem (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Tue, 19 Nov 2013 06:06:48 -0700
Doug, Write down what you do. I had to replace the HV meter resistors in my 6 meter Commander. They are under the RF deck along with the filter capacitors! Commander was never big on serviceability.
/archives//html/Amps/2013-11/msg00370.html (8,777 bytes)

44. [Amps] Crimp connector die sizes (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Sun, 24 Nov 2013 11:26:22 -0700
All, Here's what I could garner. These are just Amphenol crimp connectors straight out of the Mouser catalog so it does not include overseas stuff or other American vendors. P/N Coax Die size(inches)
/archives//html/Amps/2013-11/msg00411.html (7,496 bytes)

45. [Amps] Fw: Crimp connector die sizes (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Tue, 26 Nov 2013 20:06:17 -0700
All Please correct the 9913 0.118 inch dimension as it is the crimp size for the center pin. The shield should be 0.429 inches. I will do the correction in this email. I have learned too there is a t
/archives//html/Amps/2013-11/msg00428.html (7,892 bytes)

46. Re: [Amps] Building an Amp 101 (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Sun, 19 Jan 2014 17:52:22 -0700
Sometimes I just get a blank screen too. Hardy N7RT Vic, it seems like half the time your messages have no content. Carl KM1H _______________________________________________ Amps mailing list Amps@co
/archives//html/Amps/2014-01/msg00168.html (9,779 bytes)

47. Re: [Amps] Building an Amp 101 (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Mon, 20 Jan 2014 18:53:07 -0700
Jerry, et al, I echo the email below. A GOOD drill press is a requirement. I have a Dewalt that was a hand me down from my father, built like tank in Pittsburgh, circa 1955 and it is great! (After a
/archives//html/Amps/2014-01/msg00193.html (12,203 bytes)

48. Re: [Amps] Tube swap (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Mon, 27 Jan 2014 15:58:56 -0700
In addition to Bill's list, it will take about 30 to 40% more drive. Been there, done that. GL Hardy N7RT Yes and no. 1. The 4-1000A is taller so the chimney may not fit. 2. The 4-1000A in grounded g
/archives//html/Amps/2014-01/msg00256.html (9,173 bytes)

49. Re: [Amps] Tube swap (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Mon, 27 Jan 2014 20:18:03 -0700
Karel, I use a Hi-Pot tester made from a neon sign transformer and a few extra parts. The one I just will go to 8 kV and unfortunately, found one of my best? vacuum variables strarted arcing at 6.5 k
/archives//html/Amps/2014-01/msg00264.html (14,380 bytes)

50. [Amps] Cool Amp Silver Plating (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Fri, 28 Feb 2014 07:42:42 -0700
All, Has anyone used this power? If so, what is your opinion/facts of how your project turned out? Any special precautions needed? Thanks ahead of time. 73 Hardy N7RT ________________________________
/archives//html/Amps/2014-02/msg00269.html (6,308 bytes)

51. Re: [Amps] Alpha 77 160 meter plate choke (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Mon, 24 Mar 2014 13:43:44 -0700
Tree, The choke that's used in the Ameritron is another excellent replacement. It was designed by W8JI. It has double the inductance on 160 so you don't need as much tuning cap to achieve resonance.
/archives//html/Amps/2014-03/msg00140.html (8,632 bytes)

52. [Amps] 8877 input Z (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Thu, 27 Mar 2014 07:55:40 -0700
I am looking for the input impedance of an 8877. I found one source and that was K6DC's (SK) article years ago that said it was 54 ohms with no frequency dependency or reactive component. The input C
/archives//html/Amps/2014-03/msg00173.html (6,435 bytes)

53. Re: [Amps] where to get TL-922 fil xfrmer rewound? (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Tue, 22 Apr 2014 17:02:14 -0700
Steve, et al, I just had a transformer wound at EPD in North Carolina and was totally satisfied with the results. I got a quote from Hammond for the same xfmr and it was 70% more and an E-Core design
/archives//html/Amps/2014-04/msg00201.html (8,854 bytes)

54. Re: [Amps] Ion Pump (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Sun, 20 Jul 2014 17:07:54 -0700
Roger, As an EE myself now retired, have any experiments or production units of vacuum tubes been done while the shuttle program was ongoing? Maybe there is the vacuum of outer space that might be be
/archives//html/Amps/2014-07/msg00086.html (12,304 bytes)

55. Re: [Amps] MLA-2500 problem (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Fri, 22 Aug 2014 11:32:34 -0700
Bill, Check the values of the string of resistors in the voltage measuring path. Those old carbon comp resistors increase in value with age. I had an old Commander amp and that's what the problem was
/archives//html/Amps/2014-08/msg00051.html (9,151 bytes)

56. Re: [Amps] HV Diodes (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Tue, 14 Oct 2014 17:10:14 -0700
Manfred, et al I believe the 1N4007 is actually manufactured as a PIN diode vs the PN configuration of the others in the same family. I know it was when I was still at Motorola in the '90s. 73 Hardy
/archives//html/Amps/2014-10/msg00061.html (13,548 bytes)

57. Re: [Amps] THE SKINNY ON MY AL-82 (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Sun, 21 Dec 2014 15:19:25 -0700
It's been my experience that the 2 watt ones are the worst. I measured 1 meg resistors that have drifted up to 2.5 megs. So, think your high voltage is low and your power supply is going south? Measu
/archives//html/Amps/2014-12/msg00077.html (10,006 bytes)

58. Re: [Amps] THE SKINNY ON MY AL-82 (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Sun, 21 Dec 2014 19:11:20 -0700
Carl, I got a real laugh out of that. Thanks. The point in my email was for people to think about amplifiers, early Hallicrafters, WRL, National, etc equipment that they are trying to restore or just
/archives//html/Amps/2014-12/msg00079.html (10,822 bytes)

59. Re: [Amps] Alpha Input SWR (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Fri, 9 Jan 2015 19:08:52 -0700
Charly, Changing the length of coax to the input will not change the SWR. Look at a Smith Chart. Only dealing with the tube's capacitance along with the 50 ohm resistor to ground with a suitable matc
/archives//html/Amps/2015-01/msg00010.html (9,560 bytes)

60. Re: [Amps] Alpha Input SWR (score: 1)
Author: "Hardy Landskov" <n7rt@cox.net>
Date: Fri, 9 Jan 2015 20:12:42 -0700
My K3 has a real problem driving the 8410. Even with the matching network it has a problem I can't seem to understand. The SWR on 12 m is over 3:1. Hardy N7RT What is bad about SWR <2? 73 Peter --Ori
/archives//html/Amps/2015-01/msg00012.html (11,497 bytes)

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