Jim, almost everyone on the list immediately noticed that I accidentally typed 1/4 when I actually meant to type 1/2. They most likely noticed it because the thread has been almost 100% about 1/2 end fed radiators. The person I replied to specifically asked about adding a 1/4 wave counterpoise to a EFHW antenna. It appears that you deleted the part of the message I was replying to and only kept the portion you wanted everyone to see..
My response (this post) has nothing to do with my miss-type (we all oops sometimes) it has 100% to do with making sure you have not confused anyone on the list into thinking an EFHW is the same as a 1/4 wave radiator.. BTW I 100% agree with everything you said about 1/4 wave radiators.. I absolutely do not agree that ground losses are the same on 1/2 wave radiators as they are on 1/4 wave radiators.. Discussions about current node locations can be had another day.. Keep spreading accurate knowledge, everyone needs it, just make sure the knowledge you spread applies to the subject.. otherwise it creates even more confusion.. Regards.. Fred On 12/29/16 1:58 PM, Jim Brown wrote: > Nothing in this post is true. Optimum length for a counterpoise is a > quarter wave. Radials are a form of counterpoise, and their optimum > length is also a quarter wave. More radials reduce ground losses. > Failing to provide an adequate counterpoise will cause the antenna's > return current to flow on your coax, which makes the rig hot with RF. > That's not much of a problem with 5W, but it can be a very big deal > with 100W or more. > > Of course, it does depend on what you mean by "much" and "minimal." > Inadequate counterpoise or radial systems can easily reduce you signal > by 6 dB. That's an S-unit, and it reduces your 5W signal to 1.25W. I > wouldn't call that minimal or "not much." > > 73, Jim K9YC > > On Thu,12/29/2016 7:30 AM, Fred Moore wrote: >> With an end fed 1/4 wave you only need a counterpoise that is about .05 >> wave length. it can be the coax or another counterpoise. Although a >> counterpoise has some effect on radiation pattern of a quarter wave >> radiator, it is minimal. You won't see much improvement in performance >> by going above .05 wave length.. it's not worth the trouble to increase >> the counterpoise length.. > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to f...@fmeco.com > -- Fred Moore email: f...@fmeco.com f...@safes.com phone: 321-217-8699 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
