In article , "Jeff"
wrote:

Both are 90 degree elbows- from my measurements the ones that have a
square block of metal at the elbow were fine. The ones that looked like a
90 degree plumbing sweep had bad return loss. This may vary from mfg to
mfg, but Al Ward W5LUA who has had experience up through 24GHz agrees.
Perhaps I'll get time and inclination to mill one of the sweep styles open
and see what's up.
Dale W4OP


This is a very strange result, the non 90 degree elbow ones, normally
referred to as "swept radius" are intended to reduce the step
discontinuities that the a 90 elbow type introduce. They are usually used at
microwave frequencies where these discontinuities are more apparent.

73
Jeff

yeah now that i had a chance to check some manuf spec's seems the
losses they post for the regular rt angles looking like 2 pipe pieces
mitered and the 'square' ones seem to have same loss .1 etc 11gig

and are less ten bucks

the swep ones i saw were rated to 18gig wow and like 150bucks loss
and swr were about the same but from the very high end atten was
best


obv i don't have any first hand exp so i am not disagreeing

i know when i've had the chance to test connectors in the past
sometimes you did get some really dissapointing results

m