Author: Kirk Kleinschmidt via TowerTalk <towertalk@contesting.com>
Date: Fri, 6 Nov 2020 19:39:45 +0000 (UTC)
Hi, gang, I'm racing the arrival on Minnesota's winter, and I need to install a hexagonal beam on top of my short test tower. In the past, when building RF chokes onto FT-240-43 or FT-240-31 ferrite
http://k9yc.com/2018Cookbook.pdf Rushing to beat winter, I suggest chokes would with #12 THHN solid pair. Extensive research has shown that #43 material is a very poor choice for use at HF. 73, Jim K
Kirk The short answer is how tight you make the turns will have little real world effect. Use the RG-8X I would probably use the #31 core over the 43 . The poor mans 8 turns of coax 4-5" in diameter
That short answer is WRONG. Use the RG-8X I would probably use the #31 core over the 43 . The poor mans 8 turns of coax 4-5" in diameter without ferrites will probably actually work as well. Define "
Jim Show me the ACTUAL antenna range pattern measurement data with and without the common mode choke on a a similar antenna, with a reasonable SWR ( LESS THAN 1.5:1) and the feed line has been brou
Author: Kirk Kleinschmidt via TowerTalk <towertalk@contesting.com>
Date: Sat, 7 Nov 2020 01:38:28 +0000 (UTC)
Okay. Let's try to simplify my situation. Storm cloud are visible, so I don't have time to buy teflon coax and wind an awesome choke, mount it in a box, install SO-239s, etc. I DO have 12-gauge THHN,
Kirk, Almost all the chokes I've used in the last 10 years have been built loosely around the K9YC cookbook. Those are generally speaking a couple of type 31 ferrites with a few turns of coax runnin
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It would be interesting if you could: (1) identify and measure some particular RFI (or general noise floor) that needs to be suppressed - and (2) then install the best designed choke made from what y
I will not be drawn into debates about scientific concepts that have long been well understood. 73, Jim K9YC Show me the ACTUAL antenna range pattern measurement data with and without the common mod
Hi Jim One thing I have wondered. I saw sometime back, that taping the coil of coax to the boom of the antenna hurts the function of the coil. Is it better to just let the coil hang down, maybe from
The difficulty with what you're suggesting is that the RF noise environment is continuously changing, as we, and our neighbors, purchase new appliances and devices, as more of us install solar system
On 11/7/2020 11:04 AM, Tom Osborne Sr. wrote: One thing I have wondered. I saw sometime back, that taping the coil of coax to the boom of the antenna hurts the function of the coil. Is it better to j
<It would be interesting if you could identify and measure some particular RFI (or general noise floor) that needs to be suppressed - and (2) then install the best designed choke made from what you h