Re: BNC connectors

[Neil Fuller <neil.fuller@xxxxxxxxx>]

I'm glad you put in "old" there Phil! . . . .

Phil Harris wrote:
>
>
>
> > -----Original Message-----
> > From: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
> [mailto:ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>]
On
> Behalf Of
> > Neil Fuller
> > Sent: 14 October 2006 20:30
> > To: ukha_d@xxxxxxx <mailto:ukha_d%40yahoogroups.com>
> > Subject: Re: [ukha_d] BNC connectors
> >
> > Brian
> >
> > You almost certainly need 75 ohm connectors.
> >
> > Essentially, co-ax comes in two impedances (note, this is not the
same
> > as resistance and you can't measure it using a DVM!) 75 ohm cable
is
> > generally used for commercial and domestic TV aerials. It's also
used
> > extensively in the broadcast industry so the connectors tend to
be a
> > little cheaper. 50 ohm cable is often used by radio amateurs and
> > transmitting stations
>
> ...and also for old wired Ethernet networks. :-D
>
> Phil
>
> > When making off BNCs (or any connector for that matter) it is
critical
> > that you follow the instructions, paying particular attention to
cutting
> > the cable, insulation, sheath etc to the correct length. This is
to
> > ensure that the impedance of the connector matches to the
impedance of
> > the cable correctly.
> >
> > IME, crimped connectors are far superior to any other type. I
have a
> > crimp too here, which you are more than welcome to borrow (it
hasn't
> > been used since I left the broadcast TV industry over 8 years ago
and I
> > don't see any of that sort of work on the horizon!). Just send me
a mail
> > offlist and I'll pop it in the post.
> >
> > HTH
> >
> > Regards
> >
> > Neil
> >
> > Brian G. Reynolds wrote:
> > >
> > > Hi all, aint got a clue if this will get through as very few
postings
> > > get through to me......
> > >
> > > I have a GV650 and as you will know it has the cables
hanging out the
> > > back ending in BNC connectors.
> > >
> > > What I want to do is re-locate these to a panel on the front
of my
> rack
> > > but not sure which is the best way to go about it.
> > >
> > > I could make extension cables to panel mount joiners or I
could go for
> > > solder jointed panel mounted connectors.
> > >
> > > What I am worried about is the more connectors the more
possibility of
> > > degraded transmission quality.
> > >
> > > I have found things like 112-1748 on the RS website,
> http://.rswww.com
<http://.rswww.com>
> > > <http://.rswww.com <http://.rswww.com>>
> > > <http://.rswww.com/ <http://.rswww.com/> <http://.rswww.com/
> <http://.rswww.com/>>> but the prices
vary a lot so
> > > not sure what to
> > > order.
> > >
> > > I am told I need a 75ohm jobbie but this is about all I
know.
> > >
> > > Any advice please?
> > >
> > > Also can anyone advise me of what crimping tool to buy, I
have been
> > > using screw on items.
> > >
> > > Thanks all,
> > >
> > > Brian.
> > >
> > > [Non-text portions of this message have been removed]
> > >
> > >
> >
> >
> >
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> >
> >
> >
>
>



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