|
tnx,
and
even the audio type of transformer were tested as choke on 2.048Mb/s PCM
systems, but introduced 6dB loss, they are quite heavy, while only the
difference between the to windings adds to the series inductivity of a balanced
line
JM
---
J M Nøding,
Datakvalitet, Telenor/TTS,
Kristiansand
Telefon 0047-380-52660, 9077-7126
(QTH: 0047-380-87178)
Very often such noise could be improved
with a simple task, the first thing to try is connecting a bifilar wound choke
where your telephone line enters the house. the next is to improve at your
neighbours. Very often the balance is not what you might think…
In the
UK, the external line
is supposed to be balanced, but the extension wiring inside the house is
inherently unbalanced because it includes a third “ringing” wire (one of Dave
Lauder’s favorite topics!)
Cheers, Jim
Moritz
73 de
M0BMU
|
