Advertisement
Parts needed for Synthenizer modifications to 6 Meters:
IC Socket – Low profile 24 pin.
Capacitors.
5.6pf
- 1 of
22pf
- 2 of
Wire.
Approximately 200 mm of 0.63mm [22bs] enameled coated wire [Jaycar WW4018].
Initial Testing:
Equipment Needed.
Midland 70-066 transceiver [with 66-88Mhz EPROM installed],
Frequency Counter. Reads up to 88Mhz
Power or VSWR/Power Meter to cover 50Mhz to 88Mhz.
12 Volt power supply. 10 Amps capacity.
Signal Generator to cover 50Mhz to 88Mhz.
Testing.
Hopefully, your Midland 70-066 has an installed EPROM. And the EPROM has not been erased, If this is
TRUE then;
Connect your transceiver to a 12 Volt power supply and the antenna to power meter and dummy load. Go
to channel 1; Press the transmit button to allow the power out to be loosely coupled to a Frequency
counter. Measure the Frequency and power out.
Callsign -
Frequency -
Power Out -
Then - Connect your transceiver to a signal generator and, adjust the signal generator to the above noted
frequency; Adjust the mute to just close; then - measure the micro-volts for mute opening, for receiver
sensitivity.
Rx Sensitivity –
If all of the above are OK then you may continue with the conversion or repair your transceiver before
conversion.
Midland 70-066 low Band Conversion to 6 Meters: Synthesizer Part 2
- 1 of
[Jaycar PI-6506 ]
Jaycar
RC-5309
Note:
RC-5216
All capacitors are 50V Ceramic
Date -
Page 2.1
Advertisement
