I've done it before, and yes, it works. As you noted, you won't get a
perfect match as the harness is still short so the impedance transformation
in the matching sections isn't exactly right, but it's close. As long as
you're not adding a lot of length, the "whisker" method, as you call it,
works fine. There won't be any pattern distortion.
You can probably pick up an additional fraction of a dB by re-spacing the
elements. Just scale the spacing proportionally (e.g. increase the spacing
between elements by about 6% or whatever the harness will allow).
--- Jeff
--------------------------------------------
Jeff DePolo WN3A - [EMAIL PROTECTED]
Broadcast and Communications Consultant
> -----Original Message-----
> From: Derek B. McIntyre [mailto:[EMAIL PROTECTED]
> Sent: Monday, January 12, 2004 8:33 PM
> To: [email protected]
> Subject: [Repeater-Builder] Adding "whiskers" to a DB-224?
>
>
> I have heard that adding whiskers to a DB-224 element (150-160 MHz)
> is a good way to bring the antenna closer to resonance in the 2-meter
> ham band. I have done this and it seems to work well. Has anyone
> else tried this method and been successful, and seen any gain
> increases? Any down-falls or pattern distortions with this method?
>
> See more details and pictures:
>
http://www.w4dex.com/modify.htm
Thanks for all responses on the "identify this antenna" message.
This group has been very helpful many topics.
Derek KC4FWC
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