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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:->
EPROM board
The Synthesizer board
The Receiver board
The Transmitter PA board 1 hour
Total:
Parts Needed:
IC Socket – Low profile 16 pin.
Capacitors.
2.2pf
- 2 of
5.6pf
- 3 of
8.2pF
- 2 of
22pf
- 5 of
100pf
- 1 of
1000pf
- 1 of
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
Midland 70-066 low Band Conversion to 6 Meters: Part 1
Modifications
Alignment
1 hour
1 hour
1 hour
4 hours
Jaycar
RC-5304
Note:
RC-5309
RC-5311
RC-5216
RC-5324
RC-5336
Nil
1 hour
1 hour
1 hour
3 hours
Overall 7 hours.
All capacitors are 50V Ceramic
Page 3
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