If you have studied the schematic diagram for this radio,
you will notice that pins 15 and 16 are not indicated on
the programmable divider chip IC1 (TC9122).
By simply connecting pin 15 thru a switch to pin 1, you will
be able to move the radio up in frequency by 10 MHZ.
Some of these radios were sold without covering 140-150 MHZ.
The modification for this extended coverage is described below:
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Open up the radio and locate the FLEXIBLE BOARD, this connects
the thumbwheel switches to the MAIN BOARD.
-
At the MAIN BOARD end of the FLEXIBLE BOARD, add a jumper at
location C4. There should already be a jumper at location C2.
-
At the thumbwheel switch end of the FLEXIBLE BOARD, remove the
jumper which connects C3 and COM.
-
Reassemble the radio. Coverage is now 140-150 MHZ.(MARS/CAP)
Now, if you activate the switch described above, the radio will
now operate in the 150-160 MHZ range, after L3 adjustment,
described below.
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