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Total 11 documents matching your query.

1. Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Ed Stallman <ed.n5dg@gmail.com>; Date: Tue, 27 Sep 2016 22:35:28 -0500; My receive antenna is 75 Ohm RG6 connected to my radio and I want to wind a 2873000202 binocular core to step 75 to 50 Ohm's . I seen this info on W8JI web page but can't seem to find it again. I do; /archives//html/Topband/2016-09/msg00129.html (7,449 bytes)
2. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Lee STRAHAN <k7tjr@msn.com>; Date: Wed, 28 Sep 2016 03:46:47 +0000; Yes Ed, You have the right numbers. It won't matter which windings are first or last. You can even wind 4 then wind 1 more and use it as an autotransformer where the 1 turn is added to the 4 for 5. A; /archives//html/Topband/2016-09/msg00130.html (8,162 bytes)
3. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Grant Saviers <grants2@pacbell.net>; Date: Wed, 28 Sep 2016 07:45:21 -0700; One thing that W8JI clarified for me in winding binocular cores is what is a "turn". Normally, a wire thru a toroid hole is a "turn". A binocular core is two toroids in a single piece of ferrite. Tom; /archives//html/Topband/2016-09/msg00131.html (11,410 bytes)
4. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Tree <tree@kkn.net>; Date: Wed, 28 Sep 2016 07:47:35 -0700; I suppose I need to ask if worrying about impedance at this point in the system is really worth the trouble. Once signals have gone through one or two stages of amplification - would a loss of a db o; /archives//html/Topband/2016-09/msg00132.html (9,809 bytes)
5. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: "Chortek, Robert L." <Robert.Chortek@berliner.com>; Date: Wed, 28 Sep 2016 14:53:55 +0000; To Tree's point: have the Hi-Z Triangular Array and use it with the 75/50 transformer. After using it for a year or so, and just for curiosity sake I pulled out the transformer and hooked the 75 ohm; /archives//html/Topband/2016-09/msg00133.html (9,914 bytes)
6. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: donovanf@starpower.net; Date: Wed, 28 Sep 2016 11:02:55 -0400 (EDT); Hi Grant, Regarding your comment about the isolation transformer properties of a transformer wound on a binocular core (or on a toroidal core), their common mode choking performance is very inferior; /archives//html/Topband/2016-09/msg00134.html (12,109 bytes)
7. Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Lee STRAHAN <k7tjr@msn.com>; Date: Wed, 28 Sep 2016 16:06:23 +0000; Actually there is a reason or two to match the feedline impedances when using these active antennas. There are amplifiers in most of these systems that rely on their matched impedances to produce the; /archives//html/Topband/2016-09/msg00136.html (9,834 bytes)
8. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Wes Stewart <wes_n7ws@triconet.org>; Date: Wed, 28 Sep 2016 10:49:29 -0700; Unless the coax is acting as a delay line, in which case the phase shift is only as predicted when the line is properly terminated, the mismatch is trivial. The radio probably isn't a good match anyw; /archives//html/Topband/2016-09/msg00138.html (8,405 bytes)
9. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Ed Stallman <ed.n5dg@gmail.com>; Date: Wed, 28 Sep 2016 12:58:08 -0500; Thanks all for your wisdom . Some say not needed and some say to use the 75 / 50 transformer . I figure it's easy enuf to do . So now I'll try it and see for my self . Thanks again, Ed N5DG I do reme; /archives//html/Topband/2016-09/msg00139.html (9,294 bytes)
10. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Tree <tree@kkn.net>; Date: Wed, 28 Sep 2016 11:09:45 -0700; One easy thing you can do to test your transformer is to put a 75 ohm resistor on the proper side - and then use an SWR meter to measure the impedance on the 50 ohm side. I like to also see how high; /archives//html/Topband/2016-09/msg00141.html (10,090 bytes)
11. Re: Topband: 75 ohm RG6 to 50 Ohm radio (score: 1): Author: Ed Stallman <ed.n5dg@gmail.com>; Date: Wed, 28 Sep 2016 13:56:40 -0500; Tnx Tree , I plan to do just that using my AIM 4170 . May be a day or so, have suitcase company on the way Ed N5DG On 9/28/2016 1:09 PM, Tree wrote: One easy thing you can do to test your transformer; /archives//html/Topband/2016-09/msg00142.html (11,118 bytes)

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