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Total 174 documents matching your query.

121. Re: Topband: Foreign stns using NA remotes for K1N (score: 1)
Author: Paul Christensen <w9ac@arrl.net>
Date: Thu, 05 Feb 2015 12:38:36 -0500
desist, that is why we have the FCC, and failing that, the federal court system of the United States.² Steve, Iım not going to argue the validity of anyoneıs (mis)interpretation unless it comes from
/archives//html/Topband/2015-02/msg00191.html (10,668 bytes)

122. Re: Topband: Foreign stns using NA remotes for K1N (score: 1)
Author: Paul Christensen <w9ac@arrl.net>
Date: Thu, 05 Feb 2015 13:46:02 -0500
Peter, Tnx. Call signs of the member stations that serve 160m? Paul http://www.remotehamradio.com/the-stations/ 73 Peter --Original Message-- From: Topband [mailto:topband-bounces@contesting.com] On
/archives//html/Topband/2015-02/msg00196.html (11,292 bytes)

123. Re: Topband: Foreign stns using NA remotes for K1N (score: 1)
Author: Paul Christensen <w9ac@arrl.net>
Date: Thu, 05 Feb 2015 13:57:18 -0500
While "Radio Communication" is not the same as ³Communication,² the USC definition, if construed as Communication is actually damning for toll remote services. It includes the *transmission by radio
/archives//html/Topband/2015-02/msg00197.html (13,012 bytes)

124. Re: Topband: [TowerTalk] Radial Plate Designs (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 11 Feb 2015 08:07:47 -0500
"Those Hammy Hambone radial plates I have seen advertised are considerably more expensive than a handful of silver brazing rods and a Mapp gas outfit." Don, All good points. A few weeks back, there w
/archives//html/Topband/2015-02/msg00385.html (8,077 bytes)

125. Re: Topband: 160 Tower on 80 (score: 1)
Author: Paul Christensen <w9ac@arrl.net>
Date: Sun, 01 Mar 2015 11:22:44 -0500
Agreed. I have found it very difficult to model accurate complex base Z measurements of wide broadcast towers (i.e., low height/diam. ratio) that are of the 180-195 degree variety - even with NEC4.2
/archives//html/Topband/2015-03/msg00012.html (7,811 bytes)

126. Re: Topband: Salt-Water Qth! (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 1 Apr 2015 12:32:23 -0400
Rich, Have a look at 1KW 1130 AM on Hilton Head Island, SC (WHHW-AM). At 12 noon on any day, I can easily ride that signal down the Space Coast of FL and about 10 miles inland. That's the entire coas
/archives//html/Topband/2015-04/msg00009.html (8,582 bytes)

127. Re: Topband: earth tester (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 22 Apr 2015 09:00:02 -0400
"Do you use a earth tester? Which brand do you know is very good and accurate to consider?" Jorge, If you can, try and find a "clamp-on" earth tester rather than the type that relies on the fall-of-p
/archives//html/Topband/2015-04/msg00130.html (7,966 bytes)

128. Re: Topband: earth tester (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 22 Apr 2015 10:35:50 -0400
We used T&B/Blackburn 60CNT2 non-threaded couplers to join the ground rods. A compression fit is used to join the rods. The rods and couplers were obtained from our rural electric company. The utili
/archives//html/Topband/2015-04/msg00133.html (7,719 bytes)

129. Topband: KD9SV-OK1RR relays ??? (RX Front End Protector) (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 31 Aug 2015 09:56:45 -0400
Another option for "front end" sequencing control involves the use of a microcontroller to time R=>T and the the reverse switching events. For the past two years, I've been using an Arduino Nano-base
/archives//html/Topband/2015-08/msg00146.html (8,704 bytes)

130. Re: Topband: KD9SV-OK1RR relays ??? (RX Front End Protector) (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 31 Aug 2015 10:13:21 -0400
FYI - The S-QSK boards are now spoken for. Thanks for the replies. Paul, W9AC _________________ Topband Reflector Archives - http://www.contesting.com/_topband
/archives//html/Topband/2015-08/msg00148.html (6,865 bytes)

131. Topband: Waller Flag Question (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 7 Sep 2015 09:55:09 -0400
linear supplies (and some are vintage linear supplies float-charging sealed lead acid batteries. 73, Jim K9YC" Same here. For wall-mounted power supplies, Jameco has an excellent selection of regula
/archives//html/Topband/2015-09/msg00023.html (9,134 bytes)

132. Re: Topband: ADC Overload (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 12 Oct 2015 15:08:00 -0400
73, Jim W8ZR" Nice explanation of CLT in this context, Jim. So, as you and Tom point out, 1, 2 or 3 extremely strong stations falling within the wideband SDR input can, and does cause severe OL effe
/archives//html/Topband/2015-10/msg00078.html (8,686 bytes)

133. Re: Topband: RFI - and lots of it (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 29 Oct 2015 10:43:53 -0400
That's one reason why I like to augment a NEC-required mechanical connection with silver-solder. The mechanical connection will degrade with time but it will take significantly longer for a silver-so
/archives//html/Topband/2015-10/msg00203.html (10,805 bytes)

134. Re: Topband: RFI - and lots of it (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Thu, 29 Oct 2015 13:46:49 -0400
* I've not heard anyone talk about doing a proper clamp, and then protecting the proper clamping by silver soldering over it all. The obvious disadvantage is that changing out the connection becomes
/archives//html/Topband/2015-10/msg00209.html (7,124 bytes)

135. Topband: Switch-Mode Noise Source Identified (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Fri, 6 Nov 2015 21:27:00 -0500
Last weekend, I noticed a high level of noise on the HF bands, especially 160m through 40m. The noise was classic switch-mode. The switching frequency is 84 kHz. Yesterday, I went on foot with my RFI
/archives//html/Topband/2015-11/msg00039.html (6,692 bytes)

136. Re: Topband: 470 non carbon resistor (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Wed, 13 Apr 2016 10:22:36 -0400
terminating and cores for 9:1 in US ?" Ohmite and IRC/TT still manufacture non-L, carbon composition resistors. If there's a reason to avoid carbon composition, Ohmite and KOA manufactures ceramic c
/archives//html/Topband/2016-04/msg00090.html (7,388 bytes)

137. Re: Topband: best headphones for cw (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sat, 18 Jun 2016 22:24:52 -0400
The KPA500 has substantially less field operating time compared with the Alpha 86/89/87A series. After checking this evening, apparently Elecraft doesn't post schematics of their amplifier. It would
/archives//html/Topband/2016-06/msg00091.html (9,705 bytes)

138. Topband: NCC-1 for sale (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sat, 24 Sep 2016 13:33:15 -0400
My NCC-1 was purchased from DXE back in 2008-2009 and has never been used. Apart from changes to the manual, are there any evolutionary hardware changes or modifications? Paul, W9AC I have two DXE NC
/archives//html/Topband/2016-09/msg00106.html (9,261 bytes)

139. Re: Topband: Ladder line + tuner (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Sun, 20 Nov 2016 20:13:55 -0500
David, I think the best and quickest way to understand and observe line impedance transformations is to model it using software. Two popular programs are TLW and TLDetails. TLW is bundled with the AR
/archives//html/Topband/2016-11/msg00142.html (8,369 bytes)

140. Re: Topband: Ladder line + tuner (score: 1)
Author: "Paul Christensen" <w9ac@arrl.net>
Date: Mon, 21 Nov 2016 06:58:19 -0500
TLW also contains a powerful tuner modeling tool, allowing for the quick design of hi-pass-L, lo-pass-L, and T networks. Once the complex line input Z is calculated by TLW, the result can be input i
/archives//html/Topband/2016-11/msg00146.html (7,615 bytes)

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