From: Frank Zimmermann
Sent: Wednesday, February 04, 2004 7:13 PM
To: Jean-Pierre Koutchouk; Gerard Burtin
Subject: offer for ferrite rings





Hello Jean-Pierre and Gerard,

after further discussions with Fritz Caspers 
it turns out that, after all, ferrite rings 
should do as well as the ferrite tubes. 

There is a model which can be openend and closed
("Klappring"). Its inner diameter is 27 mm,
which is fine for the 23-mm cable, but a little
too small for the 29-mm cable. (This means that
a small air gap will remain when closing the ring.)

Fritz considered this as a resonable solution,
and also the company Schloeder did not object.
In certain conditions the air gap can even be an
advantage, e.g., preventing saturation of the 
ferrite in the dc magnetic field of our cable.

I attach the offer from Schloeder and a pdf
file with table and picture (ours is FKHA-270
corresponding to Fig. B at the bottom).
One unit costs about 3 Euro and we need at 
least 10 per BBLR wire. Do you agree that we 
ask for 100 units?

Thanks & cheers,

Frank