On Sat, 12 Nov 2005 19:41:36 -0500, (Jim)
wrote:

what coax is good to 900mhz? i am looking for something as thin and
supple as i can find. i tried a hunk of coax off of an old cb antenna
(wishful thinking) with no luck. should this work? or is hf coax no
good at 900 mhz? i built a ten element yagi off a plan i found on the
net. it should be a rocket ship but its not as good as a wide band
rubber ducky that i have. i am trying to receive a 900mhz wireless
microphone from a distance of about 200 yards. any ideas?

Unless you go for exotica thin low loss coax at 900mhz is a
contradiction in terms.

RG58 at 900mhz is a dummy load after about 15ft. (20db/100ft)
Belden 9914 is around 8db/100ft (.400inch size)

RG8X is a low loss .242" cable thats only 12db/100 at 900mhz
so if you use that and stay under 20ft the loss should be be under
3db still lossy but manageable. Generally if you want low loss cable
at 900mhz you are talking about fat or very expensive cables.

Allison
KB1GMX