Towertalk
[Top] [All Lists]

Re: [TowerTalk] Help needed on new beam

To: towertalk@contesting.com
Subject: Re: [TowerTalk] Help needed on new beam
From: Jim <jimw7ry@gmail.com>
Date: Tue, 8 Jan 2019 09:08:47 -0600
List-post: <mailto:towertalk@contesting.com>
I ran 1500 watts to a TH7 in southwest Washington for 15 years in RTTY contests. It finally blew up after 15 years.

Most likely water or bugs in the 15 meter trap. Took it down and moved to Missouri shortly there after. I too have wallpaper using it.

Thanks
73
Jim W7RY

On 1/8/2019 6:25 AM, john@kk9a.com wrote:
I remember seeing a burnt TH7 trap on the wall of the P49V/P40YL shack
with a note that said this is what happens when you run more than 500
watts on RTTY. Of course there may have been a salt buildup or other
contributing issues. I have won many contest plaques using trapped
antennas so they are not horrible. The original poster was looking for
minimal windload for a light duty tower so a two or three element trapped
tribander is a good option.

John KK9A


Jim w7ry wrote:


If traps were as lossy and you think, why don't they just smoke and burn
up when on RTTY at 1500 watts?

Get your calculator out, and if they really are that lossy, would they
would catch fire dissipating all that loss?


Thanks
73
Jim W7RY

On 1/7/2019 3:19 PM, Michael Murphy wrote:
The Navassa 5 really isn't that big.  Probably has a smaller footprint that
a KT34a.  And with full size elements may perform at least as well if not
better.

Stay away from trap antennas whenever possible.

Mike - KI8R
_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

_______________________________________________



_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>