RE: Re: Building Node0

["Keith Doxey" <ukha@xxxxxxx>]

You really need a small isolation between the earpiece and the mixer.

The one leg of the phone line is connected to ground at the exchange
and
depending on the design of the phone, it probably wont be isolated from
the
line. This can lead to you holding up the phone line.

You can also end up applying a 25V DC offset to the input of your mixer
may
not do it any good.

The transformers are only a quid or so and about 1cm x 1cm x cm.

Keith

-----Original Message-----
From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
Sent: 30 December 2002 10:34
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Re: Building Node0


Clive,

What I _actually_ did was take apart an old phone handset, run a pair
of
wires from the speaker terminals to a mixer, balance that up (by ear)
to
an appropriate level, and feed the amp from the mixer.

A bit inelegant :-)

M.

-----Original Message-----
From: Clive Dilley [mailto:clive.dilley@xxxxxxx]
Sent: 27 December 2002 22:09
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Re: Building Node0


Hi Mark  -

"- Phone with break out box, for routing incoming calls through
the
hi-fi (hands free :-))"

This is something that I have been thinking about for a while.

How did you do it?
What "break-out box" have you used?
Do you have microphones as well for full "hand-free" or just
the
in-coming signal?

Clive


-----Original Message-----
From: Mark Harrison [mailto:Mark.Harrison@xxxxxxx]
Sent: 27 December 2002 15:33
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Re: Building Node0


Andy, Laurence wrote:

> LOL!  I can't think what I'll need more CAT5 for though.

OK, here are some things that group members already use CAT5 for in
relation to telly/surround sound

- KAT5 in from "babycam"
- KAT5 out from rear channels of hi-fi to power amp at back of room (no
trailing speaker cable!)
- Ethernet into DDAR / Rio / Audiotron / Exstreamer
- IR Receiver for relay back to equipment in node zero
- IR Transmitter for control of hi-fi from HomeVision in node zero
- Phone with break out box, for routing incoming calls through the
hi-fi
(hands free :-))

Here are some projects "on the workbench" - ie installed in a
"not
permenent" manner with trailing leads

- 10BaseT into serial controller for xAP control of amp
- Via-based network DiVx player from central server

(Obviously, a lot depends on the availability of matrix switching. I
would move much more of the source system into node zero if I could,
and
only have the power amps, speakers and TV in the room.)


Another rule of thumb worth remembering is that the number of uses for
KAT5 doubles every 2-3 years... That is to say that 5 years ago, we
could come up with 2 uses ACTUALLY IN USE on the list, 2 years ago we
could come up with 4, and now we can come up with 8.

The mantra worth remembering is that "cable is cheap, fittings are
expensive." As such, always run a quad run of cable to every box,
even
if you only terminate 1 or 2 and leave the others behind blanking
plates. It's as easy to run a batch of 4 cables as it is to run a
single... but a real pig to run just one more 6 months down the line.

Regards,

Mark

http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here -
http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/



http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here -
http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/



________________________________________________________________________
This email has been scanned for all viruses by the MessageLabs SkyScan
service. For more information on a proactive anti-virus service working
around the clock, around the globe, visit http://www.messagelabs.com
________________________________________________________________________

http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx
Subscribe:  ukha_d-subscribe@xxxxxxx
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/



http://www.automatedhome.co.uk
Post message: ukha_d@xxxxxxx 
Subscribe:  ukha_d-subscribe@xxxxxxx 
Unsubscribe:  ukha_d-unsubscribe@xxxxxxx 
List owner:  ukha_d-owner@xxxxxxx
List of UKHA Groups here - http://groups.yahoo.com/group/UKHA_Grouplists/

Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.