Interference suppression kit - Barrett P/N BCA90018
General
Ignition systems
High tension
Low tension
both
Satisfactory suppression cannot be achieved if faults exist in the vehicle or vessel to be
suppressed. Cracked distributor caps, worn commutators or burnt contacts may not yet be
seriously degrading vehicle performance but will generate very high radio frequency noise
levels. Before attempting to suppress noise, problems described above should be sought
out and rectified.
Interference suppression kit contains:-
Audible as a 'popping' noise - frequency varies with engine speed.
High tension wiring should be of the impregnated neoprene type. Suppression cables using
graphite powder in a paper core are not reliable. If necessary replace with a suitable set of
suppression cables recommended for the vehicle. All high tension wiring should be
separated from any other wiring and should be placed as close to the metal block of the
motor as practical to reduce radiation of any RF noise.
Ensure that the wire from the distributor points to the ignition coil is as short as possible and
that it is not loomed together with any other cables. If the wire length exceeds 300mm it
should be replaced by a screened wire. This may be coaxial cable with the shield
connected to ground or simply consist of a twisted pair of wires, one used for the
distribution/coil connection and the other earthed at
ends. Keep all wiring as short as
possible.
In some cases the wiring from battery to coil may require suppression. In this case use the
MAR-60A noise filter supplied in this kit.
BARRETT 950 HF TRANSCEIVER
PAGE 137
1
1
Noise Filter MAR-60A
FI-07630
2
1
Noise Filter MAR-ACE
7631
3
1
Earth Strap
PO-07633
4
1m
Earth Cable
CA-06518
5
4
8mm Terminal Lugs
CN-07640
6
4
10mm Terminal Lugs
CN-07641
7
4
Capacitors
CP-01515
8
1
Suppressor
NB-04563
9
1
Clamp
NB-04565
ITEM
QTY
DESCRIPTION
BARRETT P/N
FI-0
