oops here I am typing 1/4 when the whole time I was thinking 1/2.. thanks for correcting me.. Fred
On 12/29/16 11:09 AM, K9MA wrote: > I think Fred meant an end fed 1/2 wave, NOT 1/4 wave. > > 73, > > Scott K9MA > > ---------- > > Scott Ellington > > --- via iPad > >> On Dec 29, 2016, at 9:30 AM, Fred Moore <[email protected]> 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.. Fred >> >> >>> On 12/29/16 9:01 AM, mjisted wrote: >>> Looking at your text message on the elecraft board. About a half wave >>> length ...here is a question for you. I'm going to put up a half >>> wavelength of wire for the 5 mhz band. ..hyendfed can I use a quarter >>> wave length of counter point as a radiator ground plane. .. >>> The. ..G0MVP. >>> >>> [email protected] >>> >>> >>> Sent from Samsung Mobile >>> >>> >>> -------- Original message -------- >>> From: Fred Moore >>> Date:29/12/2016 13:04 (GMT+00:00) >>> To: [email protected] >>> Subject: Re: [Elecraft] Small QRP antenna >>> >>> Don, >>> >>> Thank you very much, for pointing out a very common issue that gets >>> mixed up into discussions. Your point is so valid the random wire >>> always seems to get mixed into the 1/2 wave discussion for some >>> reason.. and should never be mixed together. you are absolutely >>> correct.. thanks again regards.. Fred >>> >>> >>>> On 12/29/16 12:33 AM, Don Wilhelm wrote: >>>> Scott, >>>> >>>> If the radiator is not a half wave long, it is not a "half wave". >>>> Yes, a random length wire may work, but please do not call a random >>>> length a half wave - the length of a half wave is quite specific. >>>> Similarly, a quarter wavelength is a specific length at a particular >>>> frequency. >>>> >>>> 73, >>>> Don W3FPR >>>> >>>>> On 12/28/2016 11:20 PM, K9MA wrote: >>>>> The counterpoise for an end fed half wave (or multiple) really doesn't >>>>> have to be anywhere near a quarter wave long. >>>> ______________________________________________________________ >>>> Elecraft mailing list >>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>>> Help: http://mailman.qth.net/mmfaq.htm >>>> Post: mailto:[email protected] >>>> >>>> This list hosted by: http://www.qsl.net >>>> Please help support this email list: http://www.qsl.net/donate.html >>>> Message delivered to [email protected] >>>> >>> -- >>> Fred Moore >>> email: [email protected] >>> [email protected] >>> phone: 321-217-8699 >>> >>> ______________________________________________________________ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[email protected] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> Message delivered to [email protected] >>> >>> -- >>> This message has been scanned for viruses and >>> dangerous content by *MailScanner* <http://www.mailscanner.info/>, and is >>> believed to be clean. >> -- >> Fred Moore >> email: [email protected] >> [email protected] >> phone: 321-217-8699 >> >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to [email protected] -- Fred Moore email: [email protected] [email protected] phone: 321-217-8699 ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
