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[TowerTalk] Re: tuning M2's 40m1L antenna

To: <>
Subject: [TowerTalk] Re: tuning M2's 40m1L antenna
From: (Jonathan Kaplan)
Date: Tue, 6 Jul 1999 15:22:04 -0700
Pat, Phil, Dennis, Don, Jay,Joe, Guy, Eric, Bill, Bruce, Larry, Dale and

Well, I spoke this morning to someone at M2 (Mike was on vacation), and they
confirmed that their balun shouldn't be reading 100ohms. They are in the
process of making 1:1 baluns this week and will send me a replacement. BTW,
they also said that at 7-10ft height, the SWR should be about 2.5-3.0:1,
definitely not 4-5:1, which indictaes a short or open.

I'll confirm any difference in performance when I receive the replacement.
Thank you all again for your time and effort in helping me solve this
-----Original Message-----
From: w5ozi <>
To: Jonathan Kaplan <>
To: <>
Date: Monday, July 05, 1999 11:43 AM
Subject: Re: [TowerTalk] Re: tuning M2's 40m1L antenna

>Well, I will really be interested in hearing what Mike says.  I am still
>inclined to think that the high SWR is the result of the close proximity to
>the ground (earth), and that it will be lowered to the correct value as the
>antenna is raised to approximately 1/2 wavelength AGL, but Mike is
>the expert, not me.  Tell him hello for me, please.  Let me hear from you
>and good luck, Jonathan.  73 de Pat
>-----Original Message-----
>From: Jonathan Kaplan <>
>To: Joe Shuey <>; alsopb <>; Dale
><>; Phil Clements <>; w5ozi
><>; <>;
> <>
To: <>
>Date: Monday, July 05, 1999 11:21 AM
>Subject: Re: [TowerTalk] Re: tuning M2's 40m1L antenna
>>Thank you all very much for trying to help me this weekend. I think it is
>>now time fore to talk to Mike at M2. I'm sure he'll know exactly what's
>>going on here. I'll report back what I find tomorrow. In the meantime, you
>>all have taught me quite a bit more about antennas in general and this one
>>in particular. And that's what this group is really for.
>>Jonathan KO6XS
>>-----Original Message-----
>>From: <>
>>To: <>
To: <>
>>Date: Monday, July 05, 1999 8:41 AM
>>Subject: Re: [TowerTalk] Re: tuning M2's 40m1L antenna
>>>It MAY be that the loaded dipole has a true impedance of about 25 ohms
>>>it is short. Then, it MAY be that the balun should be installed the other
>>>way, so that the 25 ohms is stepped up to 50 ohms.  M2 does this with
>>>their 80 meter beams.
>>>Terry Zivney, N4TZ/9

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