Hi Marcus, I have not much experience with ferrite rods, but the article in
Electronics World for August 2002 (mentioned in an earlier posting) does
evaluate various rod configurations for efficiency. I think the conclusion
is that you cannot achieve the effective height that you can easily achieve
with an open loop. They measure a 0.77m diam 38 turn loop with an effective
height of 9metres !! The best performance ferrrite rod aerial was an
effective height of 1.8m using 12 rods 200mm x 10mm. They dismiss it as
usefull only as a portable test aerial.
I hope that helps a little.
Cheers de Alan G3NYK
[email protected]
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