We stock "split-bead" ferrites that work on intercoms. This is a common
problem and usually can be solved by putting the beads over the wires
entering the main "electronics box". The principle is that the long wires
going to the slave units pick up the RF and bring into the box containing
the active amplifier circuits. Yours is the first we have run across with
flat ribbon cable; all others have been multi-wire bundles. We stock a
split for flat cable up to 2-1/2" wide. The nice thing about this approach
is that if it doesn't help you can remove it without a trace. Adding
capacitors, on the other hand, usually means soldering and "modifying" the
equipment. Let the manufacturer's tech do that. -- Jack, K6NY, Palomar
Engineers
--
FAQ on WWW: http://www.contesting.com/FAQ/rfi
Submissions: rfi@contesting.com
Administrative requests: rfi-REQUEST@contesting.com
Questions: owner-rfi@contesting.com
|