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References: [ +from:n4zr@contesting.com: 269 ]

Total 269 documents matching your query.

101. Re: Topband: Protecting short receive antennas and Phasers (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 14 Dec 2004 07:24:45 -0500
Seems to me you need to sense the PTT state of the radio versus the state of the Phaser's switch, and only allow the PTT to actuate if the switch is set to the transmit antenna. This could be done wi
/archives//html/Topband/2004-12/msg00191.html (10,819 bytes)

102. RE: Topband: 200pF HV-capacitor for shunt feeding (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 15 Dec 2004 07:47:49 -0500
This raises an interesting (to me) question. My current omega match uses a couple of identical capacitors that I got from Henry Radio in one of their surplus parts sales -- I forget exactly, but thin
/archives//html/Topband/2004-12/msg00207.html (10,071 bytes)

103. Re: Topband: Magic 'T' Combiners (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Fri, 14 Jan 2005 08:00:39 -0500
Maybe I'm misunderstanding something, but why can't two receiving antennas in phase simply be connected by equal lengths of coax and a tee? I know that there will be a mismatch, but my impression is
/archives//html/Topband/2005-01/msg00181.html (7,452 bytes)

104. Re: Topband: ? Key-clicks FT1000MK-V field ? (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 18 Jan 2005 09:09:29 -0500
At 08:21 AM 1/18/2005, Tom Rauch wrote: ... The fixes for the MP will work in the Field, but before you do that why not ask Yaesu why we must wait years and years for them to correct something as sim
/archives//html/Topband/2005-01/msg00205.html (8,319 bytes)

105. Topband: Diodes shunting receive antenna (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Sun, 27 Mar 2005 12:32:07 -0500
If I use back to back diodes across my receiver antenna input to protect it from transmitted energy, will this cause additional intermodulation beyond anything I would otherwise experience in normal
/archives//html/Topband/2005-03/msg00228.html (6,693 bytes)

106. Re: Topband: Arcing Prevention (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 10 Nov 2005 10:31:07 -0500
[I forgot the prohibition on top-posting -- resending done *properly* I hope.] Sometime within the last month or two I recall reading a description of a matching system for a 2-band vertical (80 and
/archives//html/Topband/2005-11/msg00086.html (7,152 bytes)

107. Re: Topband: Arcing Prevention (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 10 Nov 2005 14:48:45 -0500
That's the one, Joe - amazing, because I looked at the last year's QSTs but looked right past it. I'm not sure if the idea is applicable to a shunt-fed tower or not, but it seems worth considering an
/archives//html/Topband/2005-11/msg00090.html (8,005 bytes)

108. Topband: terminating resistors (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 21 Nov 2005 16:07:53 -0500
I was cruising the Mouser catalogue and ran across some 20 watt Ohmite non-inductive resistors in TO-220 cases that are described as "high pulse tolerant" designs. Any reason these wouldn't be a good
/archives//html/Topband/2005-11/msg00259.html (7,118 bytes)

109. Re: Topband: Beverage question... (score: 1)
Author: Pete Smith <n4zr@contesting.com>(by way of Bill Tippett<btippett@alum.mit.edu>)
Date: Wed, 18 Jan 2006 09:49:06 -0500
I would go straight to Fair-Rite (www.fair-rite.com), find the part you want in their catalogue, and use their neat distributor inventory search to find out who has what, and at what price. When I wa
/archives//html/Topband/2006-01/msg00270.html (7,230 bytes)

110. Topband: Carriers on 160 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 19 Jan 2006 09:50:38 -0500
I recently finished an array of K9AY loops for 160, and am now hearing things I never heard before. In particular, there are weak carriers on 1810, 1820 and 1830 KHz. They are apparently skywave, sin
/archives//html/Topband/2006-01/msg00275.html (6,720 bytes)

111. Topband: Splitting RX antenna (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 31 Jan 2006 02:41:14 -0500
A really neophyte question - can I use a tee, or would a simple switch be better to distribute 160m signal from my RX array to two receivers. The 3 dB from splitting aside, are there other considerat
/archives//html/Topband/2006-01/msg00410.html (7,013 bytes)

112. Re: Topband: 4 sq k9ay loops for topband (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 13 Mar 2006 09:48:42 -0500
For this topband season I set up a pair of K9AY loops, each pointed toward Europe, spaced 130 feet end-fire and phased 180 degrees. I chose the phasing because of ease of execution and to avoid misph
/archives//html/Topband/2006-03/msg00098.html (9,079 bytes)

113. Topband: Relays in RX array (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 21 Mar 2006 15:56:33 -0500
Can anyone point me toward a practical circuit for running a few ma at 12 volts through the relay contacts of an antenna switching system, so as to keep oxidation from building up? The subject has be
/archives//html/Topband/2006-03/msg00143.html (6,747 bytes)

114. Re: Topband: Relays in RX array (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 22 Mar 2006 07:24:18 -0500
Actually I did in the subject line. I think a few 2-buck sealed relays will probably serve me just fine. Thanks to everyone. 73, Pete N4ZR _______________________________________________ Topband mail
/archives//html/Topband/2006-03/msg00150.html (8,238 bytes)

115. Re: Topband: Relays in RX array (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 23 Mar 2006 07:16:38 -0500
K9AY and KD9SV suggested the following: Tyco/OEG OJE-SH series (sealed case, 12 volt) for spdt Omron G2R series (sealed case, 24 volt) for dpdt Gary specifically suggested the Tyco OMI-SH series, spd
/archives//html/Topband/2006-03/msg00161.html (12,142 bytes)

116. Topband: Strange sig on 1809 (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Tue, 13 Feb 2007 21:19:32 -0500
Am I the only one hearing what sounds like slow CW FSK on 1809? 73, Pete N4ZR The World HF Contest Station Database Full details on 3275 contest stations Updated 1/13/07 http://www.pvrc.org/WCSD/WCSD
/archives//html/Topband/2007-02/msg00115.html (6,403 bytes)

117. Re: Topband: protecting rx input (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 04 Apr 2007 15:16:21 -0400
I agree, except I was advised to use a string of 3 1n914s in each direction, to raise the clipping point above 2 volts and avoid IMD from strong signals. I believe that's still safe for a 50-ohm inpu
/archives//html/Topband/2007-04/msg00031.html (7,815 bytes)

118. Topband: control voltage noise in K9AY loop (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Wed, 10 Oct 2007 17:39:27 -0400
I have just finished homebrewing a 4-way switched K9AY loop. I used an old Heathkit cable-less antenna switch, model HD-1481, as the controller. On the antenna end I used Gary's circuit except for sw
/archives//html/Topband/2007-10/msg00026.html (7,510 bytes)

119. Topband: Noise from Control Voltage on K9AY Loop (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Thu, 11 Oct 2007 16:32:03 -0400
Happy to report a cure for my problem, thanks to N4GG (thanks as well to everyone else who offered suggestions). The magic turned out to be an added RF choke at thre antenna end between the relays an
/archives//html/Topband/2007-10/msg00035.html (6,951 bytes)

120. Topband: Finding AM radio stations for antenna optimizing (score: 1)
Author: Pete Smith <n4zr@contesting.com>
Date: Mon, 26 Nov 2007 08:14:27 -0500
Is there an efficient way (web site or whatever) to go about identifying radio stations in the 1600-1700 KHz range and determining their bearing from my location? I need to fiddle with the terminatin
/archives//html/Topband/2007-11/msg00207.html (7,007 bytes)

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