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World of Ham Radio 1997
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==============================================================================
K E N W O O D
>>> A M A T E U R R A D I O S E R V I C E B U L L E T I N <<<
==============================================================================
Kenwood Service Centers
Kenwood Service Corporation Kenwood Service Center, East
2201 East Dominguez Street 829 Lynnhaven Parkway, Suite 130
Long Beach, California 90801 Virginia Beach, Virginia 23452
Telephone 1-310-639-5300 Telephone 1-804-340-1702
==============================================================================
BULLETIN # 63
MODEL: TS-520
SUBJECT: ADDING IF OUT FOR USE WITH THE SM-220 SCOPE
The TS-520 and TS-520S transceivers do not provide an IF output signal.
It is necessary to have this if you want to look at a specific received
signal on the SM-220 station monitor. The best place to pick up this
signal is at the tuned output of Q4 on the IF unit (X48-1060-00). A 22 pf
capacitor should be used for coupling and a 10 Kohm resistor for impedance
matching. This is shown in the schematic below. The center conductor of
a 36 cm (14") length of 50 ohm (RG-174/U or similar) cable is connected to
the pick-up at one end and to pin 7 of the REMOTE socket on the other end.
The shield is connected to pin 1 of the REMOTE socket and the ground path
of the IF Unit. A 76 cm (30") 50 ohm cable should be made up with one end
connected to pins 7 and 1 of the 8 pin plug supplied with the transceiver
and BNC connector on the other end. The BNC connector will be plugged into
the vertical input jack on the front of the SM-220