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Total 620 documents matching your query.

121. Re: Topband: Efficiently Matching Low-Impedance Antennas to 50ohms (score: 1)
Author: "Herb Schoenbohm" <herbs@vitelcom.net>
Date: Thu, 22 Sep 2005 18:11:44 -0700
Ron, You can get close to what you want (about 25 ohms) by tying two pieces of 50 ohm coax equal half wave lengths (in coax factoring the velocity factor) in parallel hooked shield to shield and cen
/archives//html/Topband/2005-09/msg00074.html (8,614 bytes)

122. Re: Topband: "Is your feedline also an antenna?"]] (score: 1)
Author: "Herb Schoenbohm" <herbs@vitelcom.net>
Date: Sat, 8 Oct 2005 10:38:06 -0700
Tom, For the purpose of dealing with signal ingress, would not the Faraday Shield cure work on 1.8Khz as it does at 60 hz? Herb Schoenbohm, KV4FZ _______________________________________________ Topb
/archives//html/Topband/2005-10/msg00033.html (7,892 bytes)

123. Topband: CQ Contests (score: 1)
Author: Herbert Schoenbohm <herbs@vitelcom.net>(by way of Bill Tippett<btippett@alum.mit.edu>)
Date: Thu, 20 Oct 2005 16:07:14 -0400
Dear OM, I have been hoping to donate my shack to a contester from the Gulf area that lost everything but still would like to operate in one of the upcoming contests. (I have been there with 5 hurric
/archives//html/Topband/2005-10/msg00181.html (8,002 bytes)

124. Re: Topband: TopBand Operating from a Motorhome (score: 1)
Author: Herbert Schoenbohm <herbs@vitelcom.net>(by way of Bill Tippett<btippett@alum.mit.edu>)
Date: Fri, 21 Oct 2005 15:06:32 -0400
Martin, The whip on your motor home will have very poor overall efficiency but here are a few things you might want to look at: Contact Don KH6DX who has over 100 countries on 160 via his mobile oper
/archives//html/Topband/2005-10/msg00193.html (8,504 bytes)

125. Re: Topband: Using wires from large trees as verticals? (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Wed, 14 Nov 2007 08:32:50 -0400
If anyone is concerned about any losses from the tree itself, (IMHO depending on type of tree and time of the year) why not hang a 3 or 4 wire cage around the tree and feed it. In fact if the trunk
/archives//html/Topband/2007-11/msg00094.html (7,748 bytes)

126. Re: Topband: Using wires from large trees as verticals? (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Wed, 14 Nov 2007 15:33:38 -0400
the It is my understanding that it would seem to depend on the amount of top loading induced in the horizontal length of the L. The best compromise, if you are stringing an inverted L from trees of
/archives//html/Topband/2007-11/msg00103.html (9,793 bytes)

127. Re: Topband: A question on L's (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Mon, 19 Nov 2007 13:06:25 -0400
Pete don't worry so much about the angle if you have clearance from 30 to 45 degrees toward Europe. I would, however, change the configuration of the inverted "L" to a "T" which is a far more efficie
/archives//html/Topband/2007-11/msg00154.html (8,575 bytes)

128. Re: Topband: Chain link fence signal coupling (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Wed, 21 Nov 2007 09:37:04 -0400
Bruce K1FZ asked: Bruce, A 6 foot chain link fence surrounds my property. Some of my Beverages in a former hay field south of my property run for a 150' or more parallel to that fence with a separati
/archives//html/Topband/2007-11/msg00169.html (8,864 bytes)

129. Re: Topband: enameled wire source (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Thu, 29 Nov 2007 16:51:56 -0400
"I am looking for a source for ground radial wire. Glen, Try E-Bay! I recently bought some #14 THHN for $20 a 500 foot rolls and even with snail mail shipping it here via USPS beat the local price by
/archives//html/Topband/2007-11/msg00262.html (8,251 bytes)

130. Topband: ARRL 160 Meter Contest (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Fri, 30 Nov 2007 10:11:06 -0400
The ARRL has made a recent update on their website concerning the 160 meter contest which begins tonight. After much confusion about what contest status (by even veteran contesters) the U.S. overseas
/archives//html/Topband/2007-11/msg00270.html (8,169 bytes)

131. Re: Topband: de n7dd (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Mon, 3 Dec 2007 09:11:16 -0400
Question: In the ARRL 160 contest is AH2 considered a separate country? Thanks, Larry, n7dd Larry, I know it sounds strange whenever DX is declared not DX excathedra......but for the purpose of the A
/archives//html/Topband/2007-12/msg00018.html (7,764 bytes)

132. Re: Topband: Question: tower drop wire(s) use as a vertical element (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Mon, 3 Dec 2007 16:42:17 -0400
gets a single drop wire - versus - multiple drop wires configured as Rick, Ending up with a 50' vertical on 160 without top loading a single wire or multiwire cage is not going to be very efficient a
/archives//html/Topband/2007-12/msg00025.html (8,926 bytes)

133. Re: [CQ-Contest] Topband: 160m Contest Robot Update (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Wed, 5 Dec 2007 10:20:10 -0400
Either way the ARRL 160 Meter Contest gives you only 2 points for N8S (assuming it was on) and only a PAC Section multiplier if you did not work KH6. For such a rare entity as Swains, Desecheo, or N
/archives//html/Topband/2007-12/msg00049.html (8,152 bytes)

134. Re: Topband: wire Bev (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Fri, 7 Dec 2007 16:48:26 -0400
Solder them all together and roll it out and have fun. Don't tension the wire to much and use frequent supports every 50 feet or so. You can even lay it on the ground for an effective "BOG" Beverage
/archives//html/Topband/2007-12/msg00080.html (7,074 bytes)

135. Re: Topband: 1/8 wave vertical (score: 1)
Author: "herbs@vitelcom.net" <herbs@vitelcom.net>
Date: Wed, 26 Dec 2007 11:28:28 -0400
It is just short of amazing what sort of efficiency you will gain if an 1/8 wave pole is top loaded even with the top guy wires connected down to 20% before insulators and then connecting a jumper w
/archives//html/Topband/2007-12/msg00190.html (8,613 bytes)

136. Re: Topband: TX5C (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Mon, 10 Mar 2008 17:04:14 -0400
. The TX5 op, so far, has not been as strong on TB here as VP6 and they were plagued this morning with QRN. I can not agree with Dave on the TX5C TB signal strength nor on their ability to RX. VP6DX
/archives//html/Topband/2008-03/msg00028.html (8,601 bytes)

137. Re: Topband: TX5C (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Tue, 11 Mar 2008 08:30:28 -0400
disagreeing) Dave, We both agree on the comparison...I just read your post wrong. Maybe the locations can not be compared by just signal levels over the course of each DX-Pedition but whatever the c
/archives//html/Topband/2008-03/msg00036.html (8,777 bytes)

138. Topband: [Fwd: EP2TV in the 70s] (score: 1)
Author: "Herbert L. Schoenbohm" <herbs@vitelcom.net>
Date: Mon, 24 Mar 2008 08:29:27 -0400
_______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband
/archives//html/Topband/2008-03/msg00068.html (6,432 bytes)

139. Re: Topband: Source for wire? (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Thu, 10 Apr 2008 10:04:26 -0400
of verticals... Electrical Supply Stores) are not the best nor the cheapest solution. But for the price here of $27.50 per roll (less in the states I would presume) and laid out on the ground (ROG)
/archives//html/Topband/2008-04/msg00020.html (8,106 bytes)

140. Re: Topband: Source for wire? (score: 1)
Author: "Herbert Schoenbohm" <herbs@vitelcom.net>
Date: Fri, 11 Apr 2008 16:38:20 -0400
As I said the lashing wire can't beat copper for conductivity but it is usable for long Beverages especially over poor ground. It would also IMHO improve a ground system as any steel conductor would
/archives//html/Topband/2008-04/msg00037.html (9,610 bytes)

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