[Motorola] M9658 transistor and Micor repeater receiver

[n_griggs at bellsouth.net]

Thanks to all who assisted.  The problem was not the transistors in the multiplier chain.  The problem was the rivets and the 5+ year old solder that connected traces between both sides of the circuit board.   Motorola used rivets between both sides of the circuit board and soldered them to the traces on both sides.  After years of temperature changes, flexing of the board (since everyone and his brother has looked at this unit from what I understand) and possibly uneven amounts of solder, the connection from the crystal ICOM's that coupled the output of the ICOM's to the first multiplier coil became intermittent.  I found this after remembering the same problem I had with an Icom IC-22S.  Icom used the same method but used a different type of rivet than Motorola.  While the receiver was powered up and a modified GE test set connected to the test connector, I flexed the board in the crystal/multiplier area and the level jumped from 1mV to over 35 mV.  I resoldered all the rivet connections in the area and ran small gauge wire through the ones that still looked suspect and the receiver has worked with no problems since last night.  For the test connector I took a DB-9 male and aligned the pins using a soldering iron to melt the plastic on the shell and clipped one pin in each row.  I had an old GE test set for Mastr Exec/Mastr Pro's - the meter movement is 10-0-50 uA and bypassing the series/parallel resistors I soldered a cable to the selector switch.  I can now use it for both GE and Motorola radios.  Anyway I digress.  Thanks again for everyone's assistance.

Neal KC4YCM