29-10-2013, 07:44 PM
Went back to the JJ700 this afternoon, Al. The reason the radio section was silent was due to a failed 39 ohm 0.25 watt resistor in a +ve supply line going to the I.F./detector I.C., which incidentally is a SONY 'in-house' 24 pin D.I.L. device marked 168 2E 004. Replacing the resistor (R139) restored radio operation on all 3 wavebands.
