8390 to 8310

Jumper resistor is a resistor (not actually a resistor)
with 0 ohm value, usually colored green with 0 markings.
Wire can also be use instead, but must not be very thin
and should be as short as possible. Thin and long wire
will introduce high inductive reactance and will result
to weak received signal.
2. T500 can be taken from 3310 unit. It is located just
above HAGAR, refer to your service manual to easily
locate it. Also take note to its pin orientation during
installation.
Bypassing Z551 with wires is not recommended,
this will weaken the receiver sensitivity due to incorrect
signal phase relationship.
3. Give special attention when installing VCO, improper
positioning will result to no network activity