[TowerTalk] 402BA / 402BA-S / 397-S

[Joe Subich, W4TV]

The 402BA/402BA-S insulators are not at the center point.  The "center"
is connected to the inner end of the linear loading which then connects
to the elements at the insulator.  That places the insulators at a
fairly high voltage point, particularly when the antenna is operated
in the "wrong" band segment.

The stock insulators (both DE and REF) are the same as used with the
204BA and 205BA driven element.  They will hold up to 1500 W with
SWR less than 1.5:1 but don't push them any harder than that.

73,

    ... Joe, W4TV

On 6/21/2016 9:23 PM, john at kk9a.com wrote:
> The center should not be a high voltage point if you're using it on the
> resonant frequency.
>
> John KK9A
>
>
> To:	towertalk at contesting.com
> Subject:	[TowerTalk] 402BA / 402BA-S / 397-S
> From:	n1rr at comcast.net
> Date:	Tue, 21 Jun 2016 22:22:02 +0000 (UTC)
>
> Ive just picked up a 402BA but was unaware of the issue with element-to-boom
>
> insulators which breakdown
> at 500-600 watts. I'm told that this particular antenna is an newer vintage
> and
> was used at 1500 watts.
>
> Can anyone substantiate that a 402BA design or the same design as a 402BA-S
> or
> a 397-S was available
> with improved element-to-boom insulators ? If you can validate this
> offering,
> then please tell me more about
> the element insulators so that I can inspect & measure these.
>
> Thanks
> -Charlie N1RR
>
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