[Antennas] hairpin matches

[Joe Giacobello]

Yes.  When I was attempting to match a modified commercial 2M beam, I 
was originally going go with a Hairpin, but decided that a shorted 50 
ohm stub was easier.  It came out to be only bout 8.5" long and modeled 
quite reliably with EZNec.  One for 6M has to be no more than 24" long 
and can be easily taped to the boom.

73, Joe
K2XX

On 8/8/2013 10:35 AM, ka8vit at ka8vit.com wrote:
> Yes.
>
> Think of the hairpin as a one-turn coil.
>
> Usually used with a shortened driven element.
>
> 73 - Bill KA8VIT
>
>
>> On August 8, 2013 at 12:51 PM "C.Whitaker"<whitaker at pa.net>  wrote:
>>
>>
>> de WB2CPN
>> You know the length of the hairpin for 10-Mtrs, and that can be scaled
>> down to 6-Mtrs.
>> A simple ratio is fairly close.
>> The main noticeable effect of the 6-Mtr hairpin being off a bit is that
>> it may cause the
>> beam pattern to shift a few degrees either way.
>> The SWR may or may not be a very good indicator of the match you achieve.
>> 73 Clete
>
> ====================================
> Bill Chaikin, KA8VIT
> USS COD Amateur Radio Club - W8COD
> WW2 Submarine USS COD SS-224 (NECO)
>
> ka8vit at ka8vit.com
> http://ka8vit.com
> http://www.usscod.org
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