Midland 70-066, Manual

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Midland 70-066 low Band Conversion to 6 Meters: Part 1 Page 3
Acknowledgment:
This project was started in June 2008 on for amateurs interested in the use of the Midland 70-066
commercial radio transceiver. The conversion of the said transceiver to 6 Meters for amateur radio.
Acknowledgement must be given to:- Steve VK2KFJ, Peter VK2ZZA, Roger Baker VK3BKR, Mark
Detering VK3TLW, Phil Rice VK3BHR, Mark VK3BYY, Phil VK1PL & Andrew VK4OX for the
information gained from their past documentation and generous guidance.
Modifications:
The modifications contained within this document should take the average non technical amateur, the
following time’s:->
Modifications Alignment
EPROM board 1 hour Nil
The Synthesizer board 1 hour 1 hour
The Receiver board 1 hour 1 hour
The Transmitter PA board 1 hour 1 hour
Total: 4 hours 3 hours Overall 7 hours.
Parts Needed:
IC Socket – Low profile 16 pin.
Capacitors. Jaycar
2.2pf - 2 of RC-5304 Note: All capacitors are 50V Ceramic
5.6pf - 3 of RC-5309
8.2pF - 2 of RC-5311
22pf - 5 of RC-5216
100pf - 1 of RC-5324
1000pf - 1 of RC-5336
Note: If you acquire your capacitors from “Jaycar Electronics”, then please check the capacitor values
in each packet. It has been found the wrong values has been added to packets of capacitors.
For the first few weeks of the conversion - you will need a box or A4 plastic bag to hold your
screws and plates of the transceivers. Plus a 16 pin low profile IC socket [if you do not have a Z-
273 board burner], 2 of 22pf capacitors, a 5.6pf capacitor, approximately 1 meter of about
0.63mm enamel coated wire & a reel of solder wick. On the first night bring along a Philips
screwdriver. Later on, you will need a 5mm drill bit to wind your coils on.
Wire.
Approximately 10cm of 0.5mm ( NOTE: 0.63mm wire will do the job)
Approximately 1 meter of 0.63mm [22bs] enameled coated wire [Jaycar WW4018].
Markers.
Masking Tape.
Marking Pen. [for putting coil numbers on Masking tape in Tx PA section]
Drill Bit . Size – 5mm