[Antennas] hairpin matches

Thu Aug 8 12:51:30 EDT 2013

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
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
On 8/8/2013 12:41 PM, r miles wrote:
>> I recently acquired a 5 el HyGain 10m monobander on a 24' boom. The 
> yagi uses a hairpin match. The plan is to convert it to 6m. Either a 
> WVO special on 19' of boom or use the full 24'. Since it's already in 
> place we are considering using the hairpin. Obvoiusly shorter as the 
> freq is nearly double 10m. My friend W4HLR will be actually doing 
> the construction.
> We would like to hear your experiences with HyGain hairpin matches on 
> monobanders. Or any monobander. Is there an advantage using a hairpin 
> rather than gamma or other methods. DX-Eng sells hairpins & say they 
> are better than gamma, etc.
> We're hoping to end up with a heavy duty yagi as the boom & element 
> sizes of this yagi are bigger & heavier than most 6m yagis.
> It will be for next seasons 6m Es. If there is one. Hi! Really was 
> poor this Summer in NW Tn.
>> Tnx K9IL
> ______________________________________________________________
> Antennas mailing list
> Home: http://mailman.qth.net/mailman/listinfo/antennas
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Antennas at mailman.qth.net
>> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>>