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21. Re: [TenTec] Zepp? (score: 1): Author: "Rodney" <w3krq@dejazzd.com>; Date: Sat, 13 Sep 2014 22:20:22 -0400; My Ten-Tec 238 tune my 80 double ext.zepp on all bands 160-10 with a 4-1 balun 182 ft of 400 ladder line then the 4-1 with 20ft of coax. Because the MFJ 929 tuner only has unbalanced outputs thus no; /archives//html/TenTec/2014-09/msg00161.html (12,229 bytes)
22. Re: [TenTec] Zepp? (score: 1): Author: "Augie \"Gus\" Hansen" <augie.hansen@comcast.net>; Date: Sat, 13 Sep 2014 20:29:10 -0600; On 9/13/2014 7:55 PM, Bob McGraw - K4TAX wrote: I been puzzled by the most frequent and most common uses of the 4:1 balun. It seems that hams believe necessary to use a balanced feed system, open wir; /archives//html/TenTec/2014-09/msg00162.html (9,893 bytes)
23. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 08:57:16 +0200; This makes good sense, Gus. TNX. I'm fairly certain Sevick did it the other way around. I need to go re-read a couple of examples and check. 73 - Rick, DJ0IP (Nr. Frankfurt am Main) BALanced-to-UNbal; /archives//html/TenTec/2014-09/msg00163.html (9,664 bytes)
24. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 09:14:43 +0200; Bob, As long as you are using a manual tuner, that suggestion works. If you are using an automatic tuner AND running high power, then the impedance on several of the bands may be above the matching r; /archives//html/TenTec/2014-09/msg00164.html (14,102 bytes)
25. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 09:26:14 +0200; You are a LUCKY man, Rodney. Take it on the road, using a different feedline length each time (each new QTH) and you will run into problems. Here is why it is working on 160m: Normally the impedance; /archives//html/TenTec/2014-09/msg00165.html (13,468 bytes)
26. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 09:34:09 +0200; Another good point Gus. "Switchable baluns." I wanted to mention that too but you pulled the trigger faster! You can easily build two 1:1 choke baluns on two different cores. Use larger cores for mor; /archives//html/TenTec/2014-09/msg00166.html (11,453 bytes)
27. Re: [TenTec] Zepp? (score: 1): Author: Steve Hunt <steve@karinya.net>; Date: Sun, 14 Sep 2014 09:42:07 +0100; Just one observation on switchable baluns - don't do it the way Elecraft does it! They take two separate 1:1 current baluns and connect their inputs in parallel; then they connect their outputs in se; /archives//html/TenTec/2014-09/msg00167.html (9,182 bytes)
28. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 11:02:48 +0200; Steve, that's a good point. On low power it's probably still OK but real problems begin with high power. G3UNA has done a lot of testing of the Elecraft low power switchable balun together with his K; /archives//html/TenTec/2014-09/msg00168.html (10,204 bytes)
29. Re: [TenTec] Zepp? (score: 1): Author: Don Jones <ko7i@comcast.net>; Date: Sun, 14 Sep 2014 06:44:09 -0700; Gosh I think I just beat a hornet's nest with my 10 lb balun... HI HI. I did not go into a lot of details because this topic is a bit "off topic" for this forum. I did not give a lot of thought to ba; /archives//html/TenTec/2014-09/msg00169.html (11,832 bytes)
30. Re: [TenTec] Zepp? (score: 1): Author: Don Jones <ko7i@comcast.net>; Date: Sun, 14 Sep 2014 07:41:05 -0700; Just swapped the 4:1 balun out replacing it with a 1:1 balun. I am now back to using a 2 ft long jumper of RG-213 and the auto-tuner combo seems to work OK. Glad to see the longer section of coax gon; /archives//html/TenTec/2014-09/msg00170.html (9,995 bytes)
31. Re: [TenTec] Zepp? (score: 1): Author: Don Jones <ko7i@comcast.net>; Date: Sun, 14 Sep 2014 08:47:24 -0700; I like the 44ft doublet idea. But I would like to try the OCF method mentioned by Rick DJ0IP. Sounds like for a 44 ft OCF antenna the feed point would be 19ft/25ft. Correct? Hoping I can get 10M to p; /archives//html/TenTec/2014-09/msg00171.html (9,210 bytes)
32. Re: [TenTec] Zepp? (score: 1): Author: John King via TenTec <tentec@contesting.com>; Date: Sun, 14 Sep 2014 09:23:56 -0700; I can't believe that anyone who calls himself would call the described antenna a Zepp. I guess that since dumbing down the tests we can all call ourselves engineers. The Zepp antenna was an end fed a; /archives//html/TenTec/2014-09/msg00172.html (10,469 bytes)
33. Re: [TenTec] Zepp? (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Sun, 14 Sep 2014 13:23:34 -0400; -- I take it you are thinking of the old End Fed Zepp, while he may be thinking of the Extended Double Zepp, and shortened it for convenience to merely, "Zepp." -- and the Double Extended Zepp is mor; /archives//html/TenTec/2014-09/msg00173.html (11,805 bytes)
34. Re: [TenTec] Zepp? (score: 1): Author: Richards <jrichards@k8jhr.com>; Date: Sun, 14 Sep 2014 14:05:41 -0400; But I would like to try the OCF method mentioned by Rick DJ0IP. Sounds like for a 44 ft OCF antenna the feed point would be 19ft/25ft. Correct? Hoping I can get 10M to play better and would like bett; /archives//html/TenTec/2014-09/msg00174.html (13,635 bytes)
35. Re: [TenTec] Zepp? (score: 1): Author: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>; Date: Sun, 14 Sep 2014 13:10:38 -0500; Regarding baluns of note, the power rating of most baluns will be stated for matched conditions. If the balun is operating with a SWR of say 3:1 or greater, one should de-rate the power rating. Of no; /archives//html/TenTec/2014-09/msg00175.html (13,175 bytes)
36. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 20:20:47 +0200; John, The Zepp was a one sided antenna, with a quarter wavelength openwire feedline to a halfwave wire. The ground side of the feedline (at the TX) was connected to ground, the hot side connected to; /archives//html/TenTec/2014-09/msg00176.html (12,024 bytes)
37. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 20:42:26 +0200; Don, you put me on the spot here. I have never tried a 44' OCFD. I have tried both the 66' and 132' OCFD fed at that split, fed with open wire, but not the 44'. I don't like to comment on things that; /archives//html/TenTec/2014-09/msg00177.html (9,918 bytes)
38. Re: [TenTec] Zepp? (score: 1): Author: k6jek <k6jek@comcast.net>; Date: Sun, 14 Sep 2014 12:01:59 -0700; OCFD fed with open wire? I suppose everyone else here understands how that would work but I don't. Wouldn't the imbalance of the antenna turn the open wire into a radiator or did you have some kind o; /archives//html/TenTec/2014-09/msg00178.html (11,141 bytes)
39. Re: [TenTec] Zepp? (score: 1): Author: "Rick - DJ0IP / NJ0IP" <Rick@DJ0IP.de>; Date: Sun, 14 Sep 2014 21:58:05 +0200; No choke necessary. Also, "OCFD" is not = "OCFD" It all depends on how far away from the middle the feedpoint is. Now my question to you, Jon: What is the difference between feeding with coax or Open; /archives//html/TenTec/2014-09/msg00180.html (12,018 bytes)
40. Re: [TenTec] Zepp? (score: 1): Author: k6jek <k6jek@comcast.net>; Date: Sun, 14 Sep 2014 15:44:13 -0700; I was missing some of the history. Rightly or wrongly, I've been calling an off center single wire fed T a Windom. I thought the next step was coax feed with a choke. I missed the balanced feed versi; /archives//html/TenTec/2014-09/msg00182.html (13,486 bytes)

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