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Stacking width for 2 x 9 element yagis at 477mhz
Posted: Wed Jun 25, 2014 7:52 pm
by motu1981
Anyone know the exact width to stAck 2 x 9 element UHF yagis with a power divider?
477mhz
2 x RFI 9 element Yagis
Power divider with two ports tuned at 477
Vertical polarising
What is the width between each beam?
63cm?
31.5cm?
1m?
Thanks
Re: Stacking width for 2 x 9 element yagis at 477mhz
Posted: Wed Jun 25, 2014 8:24 pm
by youngn
I believe for 6 elements at UHF it's approximately 100cm, RFI should have this information somewhere, I'll see if I can dig it up.
Re: Stacking width for 2 x 9 element yagis at 477mhz
Posted: Wed Jun 25, 2014 8:25 pm
by youngn
From ZCG:
"The separation distance will vary according to the number of elements and changes from approximately 1.3 wavelengths for 6 element models up to 2 wavelengths for 15 element Yagi’s"
http://www.zcg.com.au/phasing-harness.htm
Re: Stacking width for 2 x 9 element yagis at 477mhz
Posted: Wed Jun 25, 2014 8:33 pm
by motu1981
Thanks Guys
1 wavelength at 477Mhz = 63cm
1.5 wavelengths = 94cm
2 wavelengths = 1.26m
RFI chart is somewhere around 1.5
just want to know if there is any difference in distance between phasing with a harness or using a power divider