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61. Re: [Amps] GS35B Plate connection suggestions wanted (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sat, 05 Feb 2005 13:20:03 -0500
Tomm, George, et al... If heat expands the anode cooler, it does not cause stress on the the GS-35b, because the the heat sink is completely above the tube's metal to ceramic seal. It took a while to
/archives//html/Amps/2005-02/msg00154.html (10,257 bytes)

62. Re: [Amps] W7EME 144 mcs. 8877 problems (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 06 Feb 2005 17:03:19 -0500
Jeremy... I've seen this behavior with light output loading, which causes the Q of the output network to soar and results in very high circulating currents. All the plate network circulating current
/archives//html/Amps/2005-02/msg00205.html (9,790 bytes)

63. Re: [Amps] Project Gamma Linux Question (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 13 Feb 2005 16:49:22 -0500
According to google, yes http://bstamp.sourceforge.net/ jeff, wa1hco doc wrote: Anyone know if the Basic Stamp module for circuit monitoring and protection used in project Gamma may be programmed fro
/archives//html/Amps/2005-02/msg00458.html (7,202 bytes)

64. Re: [Amps] Dual GS35b input impedance (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 13 Feb 2005 19:17:54 -0500
I've seen a variety of values for GS-35 input impedance over the range 25 to 100 Ohms. It varies between tubes because the grid bias varies with these russian tubes. I tend to believe the input imped
/archives//html/Amps/2005-02/msg00465.html (7,916 bytes)

65. Re: [Amps] Line Sections As Plate Lines (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 06 Mar 2005 00:17:52 -0500
_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-03/msg00143.html (15,025 bytes)

66. Re: [Amps] The proposed book and other matters (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 06 Mar 2005 14:36:52 -0500
Will... I'll probably buy your book. But, since I mostly run Linux, please us a format compatible with open standards. PDF will do nicely. jeff, wa1hco _______________________________________________
/archives//html/Amps/2005-03/msg00177.html (10,262 bytes)

67. Re: [Amps] Amplifier classes in solid state (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 27 Mar 2005 13:21:19 -0500
Interesting question. The original definitions certainly have tube origins. But the classes also map into conduction angle and linearity effects...which applies to all amplifiers. Setting aside the d
/archives//html/Amps/2005-03/msg00610.html (9,637 bytes)

68. [Amps] ICOM "send control" timing (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sat, 14 May 2005 16:07:25 -0400
My Icom IC-746Pro has an output called the "Send Control Jack" and the manual says "Goes to ground while transmitting to control external equipment such as a linear amplifier." I didn't see any timin
/archives//html/Amps/2005-05/msg00173.html (6,648 bytes)

69. Re: [Amps] FW: pi to pi-L o/p matching question (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 22 May 2005 12:54:14 -0400
Interesting discussion (and I like the calculator, too). But, a question, where do you get the information about the plate load constant?...any way to derive it from the published information about t
/archives//html/Amps/2005-05/msg00248.html (8,231 bytes)

70. [Amps] IC-746Pro Timing between SEND output and RF (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 22 May 2005 15:03:12 -0400
To followup on a previous question about the timing between the Send signal on the back and RF output... After a bit of measuring in SSB, FM and CW breakin, the RF starts 10 msec after Send goes low
/archives//html/Amps/2005-05/msg00251.html (6,640 bytes)

71. Re: [Amps] Arcos 2M Amp Built by W2GN (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Fri, 03 Jun 2005 18:49:58 -0400
Joe... Fred Merry was a fine craftsman and built a series of excellent VHF, UHF amplifiers using stripline construction techniques. Prior to Fred's work most amplifiers uses push-pull techniques and
/archives//html/Amps/2005-06/msg00017.html (8,200 bytes)

72. Re: [Amps] Heath SB1000 problem (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sat, 02 Jul 2005 18:47:23 -0400
Roger... Try connecting one end of the 10V winding to ground and see if it still blows fuses. It might be normal to see 1000V on that winding with an extremely high impedance meter. If the winding ha
/archives//html/Amps/2005-07/msg00013.html (10,950 bytes)

73. Re: [Amps] Ribbon Beam Amplifiers (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Mon, 15 Aug 2005 08:19:48 -0400
I met with Chiping about a year ago to discuss this technology...It's still very early in the game. The key requirements for application to cellular networks include * Greater than 13 dB peak to aver
/archives//html/Amps/2005-08/msg00517.html (7,927 bytes)

74. Re: [Amps] Ribbon Beam Amplifiers (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Mon, 15 Aug 2005 22:40:00 -0400
The requirement would be for 60 dB or better after correction...and enough stability to ensure the correction actually works. In talking to them...they hadn't gotten that far, yet. BTW, we use feedfo
/archives//html/Amps/2005-08/msg00539.html (7,789 bytes)

75. Re: [Amps] !44Mhz Gi7B amp problems continued (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 21 Aug 2005 15:11:41 -0400
Sean Is this the design at http://nd2x.net/yu1aw/GI7B-2m-LB-skem.GIF? What did you use for the output tune and load capacitors? Does the output tune exhibit a sharp dip with some peaking of output? A
/archives//html/Amps/2005-08/msg00641.html (8,813 bytes)

76. Re: [Amps] !44Mhz Gi7B amp problems continued (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Sun, 21 Aug 2005 19:45:57 -0400
Sean Williams wrote: Hi Jeff, Yep, thats the design, with the obvious bloopers removed. What bloopers? I noticed from the picture that you replaced the output coupling cap with a disk. The schematic
/archives//html/Amps/2005-08/msg00646.html (9,051 bytes)

77. Re: [Amps] Alpha releases New Amp 9500 (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Fri, 16 Sep 2005 09:02:37 -0400
"Serial port for remote control"!? We did enter the 21st century quite a while back. The Alpha 9500 needs to replace the serial port for remote control with USB. * Very soon PC's won't even have a se
/archives//html/Amps/2005-09/msg00136.html (8,767 bytes)

78. Re: [Amps] W6PO (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Thu, 06 Oct 2005 23:46:42 -0400
Paul... I've worked on 144 and 220 W6PO amplifiers that use some kit parts. I wonder if it's the same? Do you have any pictures of the parts? The amplifiers presently live off site so I can't send yo
/archives//html/Amps/2005-10/msg00168.html (7,815 bytes)

79. Re: [Amps] caps for W6PO design (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Fri, 07 Oct 2005 21:53:04 -0400
Input or output caps? _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-10/msg00177.html (7,380 bytes)

80. Re: [Amps] schematic software? (score: 1)
Author: jeff millar <wa1hco@adelphia.net>
Date: Wed, 02 Nov 2005 22:55:48 -0500
Eagle, from CadSoft, has a tube library. jeff, wa1hco _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2005-11/msg00041.html (7,802 bytes)

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