I am not a mechanical engineer or a metallurgist but I believe that the
tensile strength and yield strength for 6061-T6 and 6063-T8 are nearly
identical. I used to buy 6061-T6 for all of my homebrew Yagis from Shapiro
Metal Supply and certainly did not pay $60-$80 for 72" pieces. Lately I use
the 6063-T832 that DX Engineering sells. I really would be surprised if
Cushcraft used 6061-T6, their aluminum always seemed soft to me.
John KK9A
Michael W1ECT wrote:
A couple of years ago we had a big ice storm here that damaged my
Cushcraft 40-2CD (2-el "shorty-forty") antenna. It's been sitting
it in the basement for quite a while and I've finally gotten around
to refurbishing it.
The worst damage was to the innermost element sections (4) which were
badly bent and need to be replaced. I see that DXEngineering carries
the appropriately sized tubing: 1.250" OD, .058" wall, and 72" length.
Their price is reasonable at $21 each but the alloy is 6063-T832 and I'm
wondering if this will do the job. I did some searching around the web
for 6061 tubing and found the prices to be around $60-$80 each!
Mike - W1ECT (b1 at xmlog.com)
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