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1. Re: Topband: Feedpoint voltage (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Tue, 18 Nov 2008 05:17:06 +0100
Gary, That VV of yours will very well withstand the voltage presented over it, connected in series with the feedpoint of an inverted L! As you suggested, the voltage is not an issue here, more the ca
/archives//html/Topband/2008-11/msg00108.html (7,077 bytes)

2. Topband: Static build-up on non-grounded antennas (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Sat, 22 Nov 2008 22:36:40 +0100
Regarding Carl's, SM6CPY, question and responses to that. Sure would an RF-choke or a resistor serve to discharge the antenna and keep its potential at ground level. But on the other hand, if you are
/archives//html/Topband/2008-11/msg00163.html (7,401 bytes)

3. Re: Topband: Static build-up on non-grounded antennas (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Sun, 23 Nov 2008 07:43:09 +0100
Yes, ofcourse! Was a bit fast in my thinking there... So then the cure is to add a choke across the RX antenna teminals!? /SM3BDZ, Lars _______________________________________________ Topband mailin
/archives//html/Topband/2008-11/msg00169.html (7,773 bytes)

4. Topband: Vertical vs Inverted Vee (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Sun, 23 Nov 2008 18:29:25 +0100
When I first moved to the present location, I put up an inverted Vee - just to be on the band. Thats almost 10 years ago and it still hangs there. A simple dipole with it's apex at about 16 - 17 mete
/archives//html/Topband/2008-11/msg00177.html (7,502 bytes)

5. Topband: Propagation and evaluation of antennas... (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Tue, 13 Jan 2009 05:30:07 +0100
Hi all! Not much on the band this morning so better be on the keyboard... Regarding propagation on this band its an interesting issue. Have found many times that even if the A- and K-index is at low
/archives//html/Topband/2009-01/msg00112.html (8,414 bytes)

6. Re: Topband: CQ 160 weird ideas (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Fri, 16 Jan 2009 19:25:48 +0100
Tree and others, generally I dont think, as someone else also said, that split mix well with contesting. Maybe it would be a good idea to restrict the numers of contest on topband to the biggest, iee
/archives//html/Topband/2009-01/msg00155.html (8,143 bytes)

7. Topband: QRQ vs QRS (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Wed, 21 Jan 2009 06:33:16 +0100
Hi folks! Ever since I came on Topband, about 20 yers ago, is has been an unwritten custom to use fairly low speed CW for DX'ing on TB. My experience is that it's usually easier to copy using QRQ (i.
/archives//html/Topband/2009-01/msg00206.html (6,999 bytes)

8. Re: Topband: QRQ vs QRS (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Wed, 21 Jan 2009 17:25:04 +0100
Thanks for the responses! I agree that to high speed is no advantage. And I also can agree, that the upper limit should be about 25WPM, rather than 30. Ofcourse there can be situations when low speed
/archives//html/Topband/2009-01/msg00215.html (7,615 bytes)

9. Re: Topband: 160 to NA (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Sun, 25 Jan 2009 16:25:34 +0100
I wonder, one-way-propagation, could that really exist? To me it seems more like an excuse for not getting out so well.... Lars, SM3BDZ _______________________________________________ Topband mailin
/archives//html/Topband/2009-01/msg00258.html (8,400 bytes)

10. Re: Topband: Flooded CATV cables for TX (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Wed, 25 Feb 2009 04:58:44 +0100
Len, Thats the kind of cables we, and many others, have been using in 4-square systems for many years. I have not seen any problem with the use of that cable fór transmission, at least on the low ba
/archives//html/Topband/2009-02/msg00127.html (7,760 bytes)

11. Re: Topband: RX antenna switching (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Tue, 3 Mar 2009 18:05:46 +0100
That should work just great Pete! 73 de Lars/SM3BDZ _______________________________________________ Topband mailing list Topband@contesting.com http://lists.contesting.com/mailman/listinfo/topband
/archives//html/Topband/2009-03/msg00004.html (7,467 bytes)

12. Re: Topband: Add 160 to SB-200 ? (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Mon, 16 Mar 2009 04:16:27 +0100
Hi Mike! I did that mod to a Yaesu FL2100, wich is very similar to SB200, many years ago. The trick is to add some inductance to the tank and also add capacitance for C2. Then you must be able to tak
/archives//html/Topband/2009-03/msg00033.html (8,019 bytes)

13. Topband: Wideband x-former... (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Mon, 30 Mar 2009 23:35:36 +0200
Hi TB'ers! Anyone out there with experiences on wideband transformers wich can handle some power? I've been trying to match 20 ohms to 50 ohms for a mobile whip, but no success so far... I've tried d
/archives//html/Topband/2009-03/msg00113.html (7,162 bytes)

14. Re: Topband: Wideband x-former... (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Tue, 31 Mar 2009 04:57:25 +0200
Guys! Thank you all for the input! I will try later on today and come back with a report. 73/Lars SM3BDZ _______________________________________________ Topband mailing list Topband@contesting.com ht
/archives//html/Topband/2009-03/msg00119.html (7,812 bytes)

15. Topband: Summary: Wideband x-former... (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Tue, 31 Mar 2009 22:31:16 +0200
Its working! The trifilar wound UN-UN 2.25:1 did the trick, as many of you suggested. Also, the type of core was important info. Again thanks for the help, this is a great forum and knowledge base!
/archives//html/Topband/2009-03/msg00126.html (8,136 bytes)

16. Re: Topband: "Linear Loading" & 160-Meters (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Sat, 27 Feb 2010 02:48:46 +0100
Interesting thought Wayne! It might work, but guess you would have use a RF choke on the coax at the bottom of the element. On the negative side is that it would be at a hi-z point of the coax where
/archives//html/Topband/2010-02/msg00217.html (10,165 bytes)

17. Re: Topband: Antenna Modeling (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Fri, 5 Mar 2010 18:39:50 +0100
Hi Graham! Myself i use MMANA and EZNEC modelling software. As MMANA is freeware, I suggest you try it out. It´s a good software for most applications and a good way to get started! http://www.softpe
/archives//html/Topband/2010-03/msg00035.html (8,128 bytes)

18. Re: Topband: Newbie question (score: 1)
Author: lars.harlin@one.se
Date: Mon, 23 Aug 2010 15:33:17 +0200 (CEST)
Snip: reactance ohms wavelength on 160, say around 100 ohms, because an end-fed ½ wavelength wire Mark, Something must be seriously wrong there. Either the MFJ-259 or some feedpoint error. I would su
/archives//html/Topband/2010-08/msg00030.html (7,683 bytes)

19. Re: Topband: Beverage feeding (score: 1)
Author: "Lars Harlin" <lars.harlin@one.se>
Date: Wed, 8 Sep 2010 05:37:55 +0200
Rag, You go ahead an use your 75 ohms coax (CATV?), the missmatch wont matter at all! 73 de Lars/SM3BDZ _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
/archives//html/Topband/2010-09/msg00026.html (7,633 bytes)

20. Re: Topband: 160 wire yagi (score: 1)
Author: lars.harlin@one.se
Date: Fri, 10 Sep 2010 08:22:35 +0200
My suggestion is that you use your energy to build phased verticals instead. Probably a much better choise, as the height 120' - 55' is much to low to get a Yagi for 160m to perform. It will become
/archives//html/Topband/2010-09/msg00034.html (7,629 bytes)

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