If you do the arithmetic, that is about right. M2 claims 20.5 dbi for the 13WL.
I will bet that the loop down around 1 dbi. The yagi is at 100 feet and the
loop is at 75 feet. The loop is side mounted and the yagi is out the top. The
loop is on 5/8 inch heliax and the yagi is on 1 1/4. So, I would say that the
performance is about what I would expect.
Buddy WB4OMG
EL 98
On Sep 19, 2013, at 9:22:24 AM, "Jack W6NF" <vhfplus@gmail.com> wrote:
I'd say you have something wrong with your 432 loop if it is no better
than the back-end of your 13wl M2 yagi, which has a f/b of 22db.
As to the performance of the 432 loop, the gain should be just the same
as any other loop for any band. Again, if yours exhibits poorer behavior
there must be a problem. All loop designs are, essentially, dipoles
wrapped so the ends almost touch and they can be circular, square or
triangular...anything works. No loop design is going to be substantially
poorer than any other loop unless there is a design or assembly issue.
Regarding your 6-meter yagi pointed north...when we were in HC we worked
21 FL stations on 3/18 and 4/14/2013, including a couple of stations in
EL98. We also heard at least one beacon from FL, which was audible for
hours with no one responding to our CQs on CW and SSB. You are in a
sweet spot for working single and multi-hop sporadic E to the Caribbean
and, to a lesser extent, South America even with poor solar activity so
having *something* pointed south would be a *real* good idea. This is a
place where a loop can be of value.
73,
--
Jack, W6NF/VE4, HC2UA
Shelley, K7MKL/VE4, HC2UB
_______________________________________________
VHFcontesting mailing list
VHFcontesting@contesting.com
http://lists.contesting.com/mailman/listinfo/vhfcontesting
|