Hi Chris

Dont feel bad about not being able to work on those SMAs. They are
difficult both because of their small size, and their gender changes from
application to application.
There is *no* way I would consider wireless if the CAT 5 is a valid choice
for interconnecting computers.

Jerry

"CJB" wrote in message
oups.com...
Thanks guys for your help.

The exact problem is that I use two flats in the same block - one for
living in, and one for work - on the same floor - but separated by a
long corridor. The WiFi signal gets half-way along the corridor and
then disappears. My phone socket and WiFi router (and printers) are
all is in the work flat. I'd like to use the PC in my living flat. But
there is no WiFi signal there.

But I've actually been beaten by not being able to attach the SMA
connectors to the coax - too fiddly!! £5 down the drain I guess.

I may have an alternative - that is to use a 80 ft. long extension
cable from my phone socket in my work flat to a modem in my living
flat. I can route the cable down the corridor above the false ceiling
panels. WiFi I can use when my PC is local to the router. Hmm - kind
of contradicts the use of WiFi but the signal is too weak anyway.
Incidentally I've tried tweaking the RF power output, but its set on
maximum anyway.

Unfortunately an intermediate Linksys Range Extender / Relay will not
work because I do not have a power supply for it in the corridor mid-
way between where the router and phone socket are and where the PC
will be used.

73s -

Chris B.

On Feb 11, 9:08 pm, "David G. Nagel" wrote:
Owen Duffy wrote:
"David G. Nagel" wrote in news:12suqifm1gfv596
@corp.supernews.com:

Before you invest to much more time and money in your project, no
matter
how necessary it may be, you need to look at the signal loss generated
by the RG174 you are proposing to use. It is so extreme only very short
lengths should be used, 1" to 3'.

RG174 would be a very poor choice.

LMR195 (RG58 dimensions) is more likely to be the type of cable used for
small diameter, or larger LMR types for a long run like 40'.

The loss in 40' of LMR195 at 2400MHz is ~8dB, not a pretty picture.
Losses
in a metre or three are practical.

Owen

Owen;

I just picked on RG 174 as an example. Your choice is not very much
better which only points out the problem with coax at high frequencies.
I think that the original writer has decided on his own to do something
else.

Dave- Hide quoted text -

- Show quoted text -

"David G. Nagel" wrote in
:

Owen Duffy wrote:
"David G. Nagel" wrote in news:12suqifm1gfv596
@corp.supernews.com:

Before you invest to much more time and money in your project, no
matter how necessary it may be, you need to look at the signal loss
generated by the RG174 you are proposing to use. It is so extreme
only very short lengths should be used, 1" to 3'.

RG174 would be a very poor choice.

LMR195 (RG58 dimensions) is more likely to be the type of cable used
for small diameter, or larger LMR types for a long run like 40'.

The loss in 40' of LMR195 at 2400MHz is ~8dB, not a pretty picture.
Losses in a metre or three are practical.

Owen


Owen;

I just picked on RG 174 as an example. Your choice is not very much
better which only points out the problem with coax at high
frequencies. I think that the original writer has decided on his own
to do something else.

The LMR195 is 12.4dB better, I will leave it to the end user to make his
mind up about whether that is "not very much better".

Yes, clearly the message is to minimise the length of RF transmission
lines, and to use line types appropriate to the length and application.

Owen

"CJB" wrote in message
ups.com...
I need to enxtend the mini-coax cable on my broadband wireless router
antena. I have about 40 ft. of mini-coax. and I need to connect the
SMA male and reverse (female) connectors to either end. I got the two
connectors from Maplin but sans instructions (thinking that this would
be easy!). BUT now I can't work out how to the cable attaches to the
connectors; and there are no instructions on the web. Please can
someone help. many thanks - CJB.

You can't use 40 ft of RG174, but here are some possibilities.

1. Extend the Ethernet cable instead.
2. Use a couple of inches of RG174, then an SMA to N adapter, and 40 feet of
LMR400 or Belden 9913. Be advised, either of these is big stuff, about 1/2
inch.
3. Put a high gain yagi antenna on the router end (probably vertically
polarized), pointed at where wireless user is. If it works, this will be the
cheapest solution.

Tam