I wrote:
>Give a single Razor a 3 dB advantage (>3dB gain minus TH-6 trap loss)
>for the Razor's 60 foot boom versus the TH-6's 24 foot boom
Just for curiosity, I checked N6BV's designs (using K6STI's YO)
for the following two 15 meter Yagis:
5 elements - 24' boom - Free space gain 9.38 dBi
7 elements - 60' boom - Free space gain 12.26 dBi Delta = 2.88 dBi
Of course I doubt a TH-6 would be close to a modern optimized monoband
design so the gain differential might be up to 1 dB more than the above.
For any who want a wealth of information on multi-element Quads
versus Yagis, see W4RNL's analysis at: http://www.cebik.com/quad5.html
There is an interesting comparison of a 5 element 20M Quad (K2OB540) on
a 40' boom versus a 5 element Yagi (545W6NGZ) on a 45' boom.
73, Bill W4ZV
--
FAQ on WWW: http://www.contesting.com/FAQ/towertalk
Submissions: towertalk@contesting.com
Administrative requests: towertalk-REQUEST@contesting.com
Problems: owner-towertalk@contesting.com
|