[mythtv-users] Picture Bars - Was: Electrical power in my cable line? Is that bad?

Robin Hill myth at robinhill.me.uk
Wed Sep 12 19:01:12 UTC 2007

On Wed Sep 12, 2007 at 06:19:19PM +0100, Mike Perkins wrote:

> Brian Wood wrote:
> > Mike Perkins wrote:
> >> Interesting. I have never, ever, seen these available for sale in the UK. OK, I 
> >> can knock these up for myself if I needed to, but the implication is that your 
> >> random UK user (I can't speak for the Continent) may get problems if not all his 
> >> amplifier outlets are terminated correctly. A thing to note.
> > 
> > Are they using "F" connectors? Other types (like BNCs) can be made
> > "self-terminating", though it drives up the cost and thus is not often
> > found in US consumer stuff.
> > 
> The sockets look like these:
> http://www.maplin.co.uk/Module.aspx?TabID=1&ModuleNo=1615&doy=12m9
> and the plugs like these:
> http://www.maplin.co.uk/Module.aspx?TabID=1&ModuleNo=1604&doy=12m9
> They're not like anything else I have come across in the electronics world. I 
> dunno if they are unique to Britain, though.
It's an IEC 169-2 connector and since there's no impedance matching then
I doubt the presence or absence of a terminator will make much
difference.  Ideally you'd be recommended to replace them with F
connectors, as commonly used with satellite TV, which do impedance
matching and therefore offer less signal distortion (keeping the
standard connector only for connecting to the card/TV).

There's some stuff on the IEC 169-2 connector on Wikipedia:

    ( ' }     |       Robin Hill        <myth at robinhill.me.uk>  |
   / / )      | Little Jim says ....                            |
  // !!       |      "He fallen in de water !!"                 |
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