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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*Topband\:\s+Common\s+mode\s+chokes\s*$/: 34 ]

Total 34 documents matching your query.

21. Re: Topband: Common mode chokes (score: 1)
Author: "Craig D. Smith" <craig@powersmith.net>
Date: Thu, 9 Jul 2009 14:34:18 -0600
<> If I connect my receiver <> with a very short feedline (say 1m), to the antenna, I should <> not be receiving much common mode noise. Is that true? I believe it should be true. But, in this case t
/archives//html/Topband/2009-07/msg00037.html (8,824 bytes)

22. Re: Topband: Common mode chokes (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Fri, 10 Jul 2009 09:16:08 -0700
Not necessarily. There is a common mode circuit through the coax shield to the chassis of the equipment to which it connects, and from there to the station ground, which itself can be noisy. It is im
/archives//html/Topband/2009-07/msg00038.html (10,480 bytes)

23. Topband: Common mode chokes (score: 1)
Author: "Lee K7TJR" <k7tjr@msn.com>
Date: Fri, 10 Jul 2009 09:22:03 -0700
<> If I connect my receiver <> with a very short feedline (say 1m), to the antenna, I should <> not be receiving much common mode noise. Is that true? One must remember that common mode signals can a
/archives//html/Topband/2009-07/msg00039.html (8,779 bytes)

24. Re: Topband: Common mode chokes (score: 1)
Author: K4SAV <RadioIR@charter.net>
Date: Fri, 10 Jul 2009 12:00:57 -0500
Common mode noise gets into the antenna from the feedline due to an unbalanced to balanced transition that may not be sufficiently choked. The noise comes from mainly two places, either radiated onto
/archives//html/Topband/2009-07/msg00040.html (9,500 bytes)

25. Re: Topband: Common mode chokes (score: 1)
Author: K4RO Kirk Pickering <k4ro.tcg@gmail.com>
Date: Fri, 10 Jul 2009 13:29:35 -0500
Especially if the enclosure is going to be mounted in a difficult to reach area. I've just re-built an omega matching network for tuning the boom of my top tribander on 40M. The network is mounted at
/archives//html/Topband/2009-07/msg00041.html (9,765 bytes)

26. Re: Topband: Common mode chokes (score: 1)
Author: GEORGE WALLNER <gwallner@the-beach.net>
Date: Mon, 13 Jul 2009 07:53:44 -0400
The RX antenna needs the feedline because we have placed it away from the shack/house -- all the noise sources. In a real world environment the length of the line is a given; we do all the things de
/archives//html/Topband/2009-07/msg00043.html (9,625 bytes)

27. Re: Topband: Common mode chokes (score: 1)
Author: "Jim Brown" <jim@audiosystemsgroup.com>
Date: Mon, 13 Jul 2009 13:53:51 -0700
Yes, I would expect it to work quite well as an alternative to coax where you want light weight for travel and don't care about deterioration from UV. On the other hand, coax is probably more conveni
/archives//html/Topband/2009-07/msg00044.html (10,327 bytes)

28. Re: Topband: Common mode chokes (score: 1)
Author: "Richard (Rick) Karlquist" <richard@karlquist.com>
Date: Tue, 14 Jul 2009 20:42:14 -0700
I have used CAT5 pair to make transmitting transformers at the legal limit up to 7 MHz. They give you a very good 100 ohm line for no effort. I have also used them for short (30 foot) feedlines for c
/archives//html/Topband/2009-07/msg00047.html (9,441 bytes)

29. Re: Topband: Common mode chokes (score: 1)
Author: "G4GED Dave" <radiodave.g4ged@tiscali.co.uk>
Date: Sun, 19 Jul 2009 08:03:18 -0800
I double "weather resist" all my various plastic outdoor cct boxes/baluns etc by positioning them in such a way that I can slip an an approprately sized upside-down plastic soft drinks bottle (cut of
/archives//html/Topband/2009-07/msg00076.html (9,140 bytes)

30. Topband: Common Mode Chokes (score: 1)
Author: wb6rse1@mac.com
Date: Sun, 09 Jun 2013 18:57:17 -0700
G3TXQ shows characteristics for common mode chokes: http://www.karinya.net/g3txq/chokes/ Has anyone built the 17T of RG58 on an FT240-31 choke and verified the performance? TU - Steve WB6RSE All good
/archives//html/Topband/2013-06/msg00029.html (6,304 bytes)

31. Re: Topband: Common Mode Chokes (score: 1)
Author: Bob K6UJ <k6uj@pacbell.net>
Date: Sun, 9 Jun 2013 20:09:57 -0700
Jim, K9YC, where are you ? (If anyone has Jim has for sure) Bob K6UJ All good topband ops know how to put up a beverage at night. _________________ Topband Reflector
/archives//html/Topband/2013-06/msg00030.html (6,911 bytes)

32. Re: Topband: Common Mode Chokes (score: 1)
Author: Grant Saviers <grants2@pacbell.net>
Date: Sun, 09 Jun 2013 21:30:19 -0700
I have built several chokes on FT240-31 cores with RG142 double silver shield TFE coax (ok for QRO anywhere at HF) and measured them with my VNWA 2.6. For my 160m top loaded vertical I stacked three
/archives//html/Topband/2013-06/msg00031.html (7,609 bytes)

33. Re: Topband: Common Mode Chokes (score: 1)
Author: Jim Brown <jim@audiosystemsgroup.com>
Date: Sun, 09 Jun 2013 22:32:08 -0700
There's lots of measured data in the RFI tutorial on my website. A 16 turn (x2) bifilar choke connected as parallel wire line will work VERY well on 160-40M. It will handle legal limit if the common
/archives//html/Topband/2013-06/msg00032.html (7,461 bytes)

34. Re: Topband: Common Mode Chokes (score: 1)
Author: wb6rse1@mac.com
Date: Mon, 10 Jun 2013 20:47:46 -0700
My thanks to K9YC, KZ1W and everyone else who replied. Steve WB6RSE All good topband ops know how to put up a beverage at night. _________________ Topband Reflector
/archives//html/Topband/2013-06/msg00033.html (7,066 bytes)

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