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61. Topband: High power Transistor question (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Thu, 5 Jul 2012 15:15:01 -0700
Anyone using the MRFE6VP61K25H, 1250 watt output, wideband RF power transistors in a home brew, 1.8 to 30 MHZ, SSB linear amplifier ? If yes, would you like to share your results ? __________________
/archives//html/Topband/2012-07/msg00071.html (6,317 bytes)

62. Topband: High power transistor for HF amp. (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Thu, 5 Jul 2012 17:47:00 -0700
Thanks, I appreciate the information. The FM Broadcast station, that I do engineering, just purchased a new to the market Harris 10 KW transmitter, that just arrived today. Installation the next few
/archives//html/Topband/2012-07/msg00072.html (7,631 bytes)

63. Topband: New Linear amp (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sat, 7 Jul 2012 11:46:40 -0700
This MRFE6VP61K25H solid state device is catching on fast in amateur radio circles. HF Amps next. http://www.m2inc.com/pdf_manuals/2M-1K2.pdf 73 Bruce-K1FZ ___________________________________________
/archives//html/Topband/2012-07/msg00080.html (6,259 bytes)

64. Re: Topband: New Linear amp (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sat, 7 Jul 2012 13:18:02 -0700
Hi Tom, The new Harris Flexiva 10 KW FM band (not pulse) stereo transmitter is not having a heat problem with air cooling, in a reasonably small package . It has individual modules that can be hot sw
/archives//html/Topband/2012-07/msg00082.html (9,459 bytes)

65. Topband: Harris 10 KW FM transmitter (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sat, 7 Jul 2012 15:07:39 -0700
Info: Product # HARFAX10KCD Product description: Harris FAX10CD transmitter 73 Bruce-K1FZ _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
/archives//html/Topband/2012-07/msg00083.html (6,161 bytes)

66. Topband: Fw: New Linear amp (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sat, 7 Jul 2012 18:08:58 -0700
Hi Rick, Did you notice the 2 meter amplifier that the device is biased for SSB operation ? http://www.m2inc.com/pdf_manuals/2M-1K2.pdf 73 Bruce-K1FZ _______________________________________________ U
/archives//html/Topband/2012-07/msg00085.html (6,482 bytes)

67. Topband: Fw: New Linear amp (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sat, 7 Jul 2012 19:26:10 -0700
Hi Tom, Yes, the broadcast 50 ohm load has a very low VSWR. Harris claims that with the 75 % RF efficiency, and only 25 % heat generation, it lets them to use air cooling. Individual new power supply
/archives//html/Topband/2012-07/msg00087.html (11,909 bytes)

68. Topband: Linear amp (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sat, 7 Jul 2012 21:06:29 -0700
Page 6 states, when the amplifier is in the Single Sideband mode, SSB or CW, the amplifier is in the linear mode and delivers 1200+ peak to the antenna. Tuned or unturned, if the toroids or tuned cir
/archives//html/Topband/2012-07/msg00089.html (8,001 bytes)

69. Topband: More Amplifier info (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sun, 8 Jul 2012 09:28:05 -0700
Here a few of the Amplifier postings: F1JRD amplifier. http://www.qsl.net/f1jrd/MRFE6VP61K25H.html Juma OH7SV, OH2NLT, work http://www.nikkemedia.fi/juma-pa1000/ Italian modules for sale ITALAB CW,FM
/archives//html/Topband/2012-07/msg00095.html (7,028 bytes)

70. Topband: Better TX transistor cooling (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Tue, 10 Jul 2012 14:14:33 -0700
http://members.chello.nl/b.modderman/MRFE6VP61K25HR5.html High power Transistor cooling. See watercooling...left side index 73 Bruce _______________________________________________ UR RST IS ... ...
/archives//html/Topband/2012-07/msg00129.html (6,342 bytes)

71. Topband: Beverage strain (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sun, 22 Jul 2012 08:55:08 -0700
It's almost enough to drive one back to electric fence wire. It's inexpensive and reconnects easily using the wireman splice. 73 Bruce-K1FZ If water gets into WD1A, the three steel strands rust throu
/archives//html/Topband/2012-07/msg00264.html (6,780 bytes)

72. Topband: Fw: Beverage strain (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sun, 22 Jul 2012 09:55:01 -0700
The wireman splice is also known as a Western Union Joint, or Western Union splice. It worked well over long distances for early Morse code key pounders. 73 Bruce It's almost enough to drive one back
/archives//html/Topband/2012-07/msg00265.html (6,328 bytes)

73. Topband: Beverage (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sun, 22 Jul 2012 11:38:29 -0700
At low impedance, the impedance can double in inches* of spacing change , at high impedance doubling the impedance takes a lot of spacing change, Electric Fence wire can be mounted vertically to elim
/archives//html/Topband/2012-07/msg00269.html (6,567 bytes)

74. Topband: Beverage antennas (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Mon, 23 Jul 2012 12:56:54 -0700
Re Craig: There are no perfect solutions for Beverage wire and all have problems. One big factor in the Northeast is Limes Disease, spread by Deer ticks, from Deer, and a few other creatures. It beco
/archives//html/Topband/2012-07/msg00292.html (7,437 bytes)

75. Topband: Beverage antennas and Ticks (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Mon, 23 Jul 2012 17:37:10 -0700
Bet there are many tick stories in the DX group. I was on active duty at Fort Sill, Oklahoma in 1957 and while I was shaving in the BOQ latrine one of the guys noticed a tick on my back. They burned
/archives//html/Topband/2012-07/msg00303.html (7,039 bytes)

76. Topband: Fw: Spark gaps (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Fri, 27 Jul 2012 16:48:20 -0700
Tom is correct. very Low resistance and of some size is necessary to pass the charge on down into the earth. Carbon arcs used in movie projectors produced a very bright light for the large viewing sc
/archives//html/Topband/2012-07/msg00375.html (6,311 bytes)

77. Topband: Ticks-electric fence-noise blanker (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Mon, 30 Jul 2012 10:03:55 -0700
Deer/Tick control with minimum 160 meter noise at my QTH: I have a very large Bombay species cat. An outside cat most of the day, I check him for ticks when he comes in with a very fine toothed, lice
/archives//html/Topband/2012-07/msg00398.html (7,744 bytes)

78. Topband: opinion (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Fri, 3 Aug 2012 12:26:11 -0700
It's a balance. Even a correct new idea sometimes takes it "in the neck" so to speak. Think of all the crap the first guy took from those that said the sun was circling the earth. After all you could
/archives//html/Topband/2012-08/msg00057.html (6,454 bytes)

79. Topband: opinion (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Fri, 3 Aug 2012 16:37:01 -0700
Herb, My mistake about the posting censor. I had the topband address incorrect. Maybe had too many days hiking up on the mountain installing the new FM radio station transmitter this week. Sorry Tree
/archives//html/Topband/2012-08/msg00071.html (7,122 bytes)

80. Topband: Soldering in the wild! (score: 1)
Author: "Bruce" <k1fz@myfairpoint.net>
Date: Sat, 4 Aug 2012 13:53:08 -0700
Hi Ken, I use the Ultratorch UT-100Si It works well except when I am mountain topping in a cold wind. (air cooling) Think they have a larger model http://www.masterappliance.com/heat-tool-products/bu
/archives//html/Topband/2012-08/msg00085.html (7,987 bytes)

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