Wiring SMA connections
 

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.

Wiring SMA connections
 

On 11 Feb 2007 09:51:10 -0800, "CJB" wrote:

I have about 40 ft. of mini-coax. and I need to connect the
SMA male and reverse (female) connectors to either end.

It would be simpler to just attach a resistor. That much cable is
going to be so lossy that any useful signal going in will never see
the other end.

The solution is to use 40ft of Cat9 to extend the wireless router.

73's
Richard Clark, KB7QHC

Wiring SMA connections
 

OK - thank you. I think I need what is called a pigtail; but at a
price. And - yes - I think the cable will be too lossy. I'll research
the cat9 solution suggested. Thanks. Or I'll just have to buy a
Linksys Range Extender at £100+. Unfortunately the guys at Maplin
hadn't a clue on how to advise me. Actually I might just be able to
use a 40ft phone extension cable and use a modem instead of WiFi. The
WiFi sgnal is just too weak to go though 5 brick walls!! Thanks again
- Chris Brady.

Wiring SMA connections
 

CJB wrote:
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.

CJB;

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'.
A better suggestion would be to purchase a range extender that is
available from most vendors of broadband equipment such as Best Buy and
CDW to name two.

Dave N

Wiring SMA connections
 

"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

Wiring SMA connections
 

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

Wiring SMA connections
 

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 -

Wiring SMA connections
 

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 -

Wiring SMA connections
 

Just found a possible solution:

http://www.amazon.co.uk/o/ASIN/B000B...175332-7741501

CJB.

Wiring SMA connections
 

On 11 Feb 2007 15:19:11 -0800, "CJB" wrote:

Just found a possible solution:

Only if both flats can take the 5dB loss in the cable, AND the path
loss of 4.5 meters. Wireless routers are rated for quite a distance
in the clear, but apparently your brick puts the challenge to that.

Walk down the hall with your laptop running its adapter program
showing signal strength. How far can you go? If it isn't half way,
you don't stand a chance. If you can, then subtract 5dB (which means
roughly to the other flat's front door) and the signal should still be
substantial (or your throughput will plummet).

Run CAT5 between flats and buy another router.

73's
Richard Clark, KB7QHC