Author: Hans Hammarquist via TowerTalk <towertalk@contesting.com>
Date: Tue, 5 Aug 2014 13:40:23 -0400 (EDT)
Well Dan, I just received a TX38 from Cycle24. All the elements are insulated from the bom. I don't know if that's for convenience but the elements are clamped to the bom with plastic/hard rubber cle
The advantage of using insulated elements mounted above/below the boom is that one does not need to correct for the boom. There is no need to adjust the elements for shortening due to passing through
Dan/Hans, I cannot imagine building another antenna with parasitic elements mounted to an aluminum plate with the elements electrically connected to the boom and haven't made one that was connected i
I cannot imagine building another antenna with parasitic elements mounted to an aluminum plate with the elements electrically connected to the boom and haven't made one that was connected in over a d
However, if that is the case, a short wire connected from the center of the last director and reflector to the boom will provide the desired connection for top loading on 80/160 without upsetting th
Insulating the elements will certainly reduce the correction for the boom and mounting plate, but does not eliminate corrections completely. There is still a proximity effect, which will obviously be
Insulating the elements will certainly reduce the correction for the boom and mounting plate, but does not eliminate corrections completely. There is still a proximity effect, which will obviously be
This brings up a big question in my small mind. Assuming you need to correct element length, I can see you can use SWR to adjust the driven element. But how do you correctly know how to correct or ad
I guess I should add, assuming the elements are all grounded, so the offset would affect all the elements. Lee, w0vt This brings up a big question in my small mind. Assuming you need to correct eleme
It was only an idea, but at least I can share the thinking behind it... The aim is to use a HF (20-10m) beam with insulated elements for top loading the whole tower on one or more of the LF bands, so
I think it depends on why you are adjusting the driven element. If you are adjusting the DE because you did not model the feedline or matching system if used, then there is no reason to change the pa
Author: K7LXC--- via TowerTalk <towertalk@contesting.com>
Date: Wed, 6 Aug 2014 11:06:44 -0400 (EDT)
correct element length, I can see you can use SWR to adjust the driven element. But how do you correctly know how to correct or adjust the reflector, or for that matter any parasitic element? During
On 8/5/2014 6:54 PM, L L bahr wrote: But how do you correctly know how to correct or adjust the reflector, or for that matter any parasitic element? During the Dark Ages when I first got licensed, yo
-- Original Message -- correct element length, I can see you can use SWR to adjust the driven element. But how do you correctly know how to correct or adjust the reflector, or for that matter any par
Author: Hans Hammarquist via TowerTalk <towertalk@contesting.com>
Date: Wed, 6 Aug 2014 23:39:55 -0400 (EDT)
Usually you want to keep the non-split element non-split due to mechanical reasons. You do impair the structural strengths by splitting them even if you add material afterwards. Try the method of cou
Author: Hans Hammarquist via TowerTalk <towertalk@contesting.com>
Date: Thu, 7 Aug 2014 08:59:27 -0400 (EDT)
Thank you, Ian. Hans - N2JFS the My first reaction was "Go Google for it!" because there is lots of information about element length corrections on the web. However, there is surprisingly little on t