"ml" wrote in message
...
In article t3vTg.1268$753.976@trnddc05,
"Dale Parfitt" wrote:

"ml" wrote in message
...
hi

I was wanting to dispel some myths about connector losses

lets assume my worst case freq 450mhz LOW /week singal work

lets assume my worst coax is ether lmr400 or 600 (not imp )

so naturally i'd use typically N connectors

how much do i lose if I screw in a right angle adapter?


My comment would be on the right angle N connectors. They vary
dramatically.
My area of interest is 1296MHz EME where any loss before the Feedhorn LNA
shows up easily. I have an HP network analyzer and qualified a number of
right angle N's. In general the adapter with a square block at the elbow
were fine- under -0.03 dB. The gradual bend (called a sweep in plumbing
terms I believe) had unacceptable return loss and much higher loss
(sorry,
no figures there).

Dale W4OP

thanks rich and dale

appreciate the help!

rich i new the connector was bad cause i noticed less power on my meter
swapped it out, got a few lemons

dale: wow i always wondered about those elebow square designs ,
not sure what you ment by the 'gradual' bend ones i've seen the
'standard' right angle connectors but werent' 'gentle' they were 90
hard bends is this what you ment?


or did you ment if you simply made a gentle arc in the coax vs using
a rt angle connector tht a good connector rt angle adapter was better


i'd like to put a few adapters both F/F and rt angles on but didn't
want to do it if it would kill me loss wise


thanks
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