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101. Re: [Amps] emtron dx-1??? for a couple hundred bucks? (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Tue, 06 Jun 2006 08:38:26 +0200
For the DX4 with three phase PSU and @ US$ 8500.- that should be US$ 1.41 /watt Cheers, Dick PA3DUV _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
/archives//html/Amps/2006-06/msg00153.html (10,192 bytes)

102. Re: [Amps] buying MRF-150's (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 07 Jun 2006 09:56:09 +0200
CCI might be another possible source. http://www.communication-concepts.com/ Marlis at cci.dayton@pobox.com has alway provided me with very good service and competitive pricing on HF power devices. C
/archives//html/Amps/2006-06/msg00190.html (8,262 bytes)

103. Re: [Amps] New Dummy Load (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Fri, 16 Jun 2006 23:05:48 +0200
I have used the Palstar DL5K with 5 kW input and found the dummyload a good performer. However, the directional coupler and the power measurement electronics are not frequency compensated. With a rat
/archives//html/Amps/2006-06/msg00308.html (9,250 bytes)

104. Re: [Amps] New Dummy Load (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 18 Jun 2006 13:13:11 +0200
Will, Paul has used a toroidal transformer, completely shielded. The directional couples is well engineered. I will make some pictures of the internals of the DL5K an post them on the emtron yahoo gr
/archives//html/Amps/2006-06/msg00318.html (12,717 bytes)

105. [Amps] internal pictures DL5K dummyload (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 18 Jun 2006 14:12:32 +0200
Pictures of the DL5K dummyload internals can be found in the picture section of the yahoo emtron group: http://ph.groups.yahoo.com/group/emtrondx15 Cheers, Dick PA3DUV _______________________________
/archives//html/Amps/2006-06/msg00319.html (6,277 bytes)

106. Re: [Amps] Friedrichshaven - a new toy (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Mon, 26 Jun 2006 16:49:52 +0200
I guess one can legally import it for personal use without FCC certification. Cheers, Dick PA3DUV _______________________________________________ Amps mailing list Amps@contesting.com http://lists.co
/archives//html/Amps/2006-06/msg00434.html (9,784 bytes)

107. Re: [Amps] Friedrichshaven - a new toy (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Mon, 26 Jun 2006 17:01:03 +0200
There is no gud reason for mo' bureaucracy other than the bureaucrats themselves. Cheers, Dick PA3DUV -- Original Message -- From: "Peter Chadwick" <g3rzp@g3rzp.wanadoo.co.uk> To: "Phil Clements" <p
/archives//html/Amps/2006-06/msg00436.html (8,999 bytes)

108. [Amps] IM distortion and such (score: 1)
Author: pa3duv <pa3duv@planet.nl>
Date: Sat, 01 Jul 2006 13:33:52 +0000
This posting seems to have missed the amps list. Cheers, Dick PA3DUV Gary, you make the same mistake Rich does ... the voltage is not necessarily due to parasitic oscillation at VHF frequencies. Almo
/archives//html/Amps/2006-07/msg00006.html (6,898 bytes)

109. [Amps] 4CX10 000J (score: 1)
Author: pa3duv <pa3duv@planet.nl>
Date: Sun, 02 Jul 2006 09:29:04 +0000
Fo those working on a QRO project; Allen Bond from Max Gain Systems has some NOS 4CX10000J tetrodes for sale. Cheers, Dick PA3DUV _______________________________________________ Amps mailing list Amp
/archives//html/Amps/2006-07/msg00036.html (6,216 bytes)

110. Re: [Amps] Fw: "Tubes 201" - How Vacuum Tubes Really Work (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Tue, 25 Jul 2006 22:37:46 +0200
Moin Peter, Manche hier kenne die Deutsche Sprache. Ein paar Bilder von diese Multirohr Enstufen sind auch Hoechstinteressant. Tschuess, Dick PA3DUV _______________________________________________ Am
/archives//html/Amps/2006-07/msg01119.html (18,031 bytes)

111. Re: [Amps] plexiglas isolation in coils (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 26 Jul 2006 23:07:25 +0200
Lexan (polycarbonate) might be a better alternative. My HiQ 5-89 centerloaded vertical has the loading coil inside a lexan tube. On 80 meters with 1 kW+ on the antenna the voltages over the coil will
/archives//html/Amps/2006-07/msg01191.html (8,728 bytes)

112. Re: [Amps] Arc distance and plasma (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sat, 29 Jul 2006 17:14:55 +0200
Bill Clinton saw a purple glow AND arcs without inhaling! Cheers, Dick PA3DUV _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman
/archives//html/Amps/2006-07/msg01298.html (13,576 bytes)

113. Re: [Amps] Tube Prices (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 30 Jul 2006 21:25:19 +0200
GU74B NOS tetrode tubes went for 50 Euro in Friedrichshafen last June. 2 units: 1.6 kW plate dissipation for 100 Euro. The GU84B tetrode tube (2.5 kW plate dissipation) sold for Euro 180.- Our friend
/archives//html/Amps/2006-07/msg01401.html (10,998 bytes)

114. Re: [Amps] band decoders for 1.5kw low pass filters (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sat, 05 Aug 2006 19:05:03 +0200
The W3NQN filters from Array can handle 200 watt SSB only, barely enough for QRP. I use them for my multi TRX Winlink station, they perform very well. The Microham banddecoder covers 11 bands. The un
/archives//html/Amps/2006-08/msg00188.html (8,765 bytes)

115. Re: [Amps] Ameritron Amps (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 06 Aug 2006 17:57:36 +0200
Polycarbonate seems to perform well at both low and high frequencies. @ 1.2 kW input in my center loaded mobile vertical the Lexan loading coil tube with internal helix groove where the coil wire is
/archives//html/Amps/2006-08/msg00209.html (10,194 bytes)

116. Re: [Amps] Ameritron Amps (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Sun, 06 Aug 2006 22:48:09 +0200
The loading coil of my HiQ 5-160 centerloaded vertical has an impedance of 10 + J 3494 ohms @ 1200 watt (f=1.9 MHz) input at the antenna feedpoint the voltage over the loading coil is 29 910 volt and
/archives//html/Amps/2006-08/msg00230.html (9,678 bytes)

117. [Amps] Fw: Step Start on a 3KA Amp (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Thu, 21 Sep 2006 07:30:53 +0200
_______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2006-09/msg00255.html (8,268 bytes)

118. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Thu, 21 Sep 2006 13:39:23 +0200
Thats right Harold. But when one switches the amp on the switching of the triac can be heard on the HF transceiver. However, this is not really an issue since it disappears in approx. 2 seconds. I ha
/archives//html/Amps/2006-09/msg00256.html (8,147 bytes)

119. Re: [Amps] Step Start on a 3KA Amp (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Wed, 20 Sep 2006 21:27:43 +0200
Ian, A picture of the Emtron switched mode softstarter + schematic diagram are available at: http://ph.groups.yahoo.com/group/ham_amplifiers/photos I've heard that Emtron is selling their softstarter
/archives//html/Amps/2006-09/msg00257.html (9,819 bytes)

120. Re: [Amps] Fw: Step Start on a 3KA Amp (score: 1)
Author: PA3DUV <pa3duv@planet.nl>
Date: Thu, 21 Sep 2006 17:37:33 +0200
Hal, The softstarter in the Emtron amps is a phase control triac system, not a zero crosser. It allows gradually more of the primary AC sinewave into the powersupply. By doing so there is no need for
/archives//html/Amps/2006-09/msg00263.html (8,557 bytes)

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