RE: BNC connectors

["Phil Harris" <phil@xxxxxxxxxxx>]

> -----Original Message-----
> From: ukha_d@xxxxxxx [mailto:ukha_d@xxxxxxx] On Behalf Of
> Neil Fuller
> Sent: 14 October 2006 20:30
> To: ukha_d@xxxxxxx
> 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/>> 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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