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QRZ! Ham Radio 14
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QRZ Ham Radio Callsign Database - Volume 14.iso
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c568.txt
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1999-10-09
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Subject: Re: Standard C568A - TX Mod
From: Larry Smith <Larry@g4oxy.demon.co.uk>
STANDARD C568 TX MOD
Open the radio with care. Remove the four screws at the back of the radio
and remove the back remove 2 screws from the front of the metal plate
at the bottom of the unit and open the front panel. Be careful not to
pull the ribbon connectors. The logic board is on the back of the key pad.
There locate VR281 and VR265 above is a copper screen. Remove the sub
board located over the screen by gently pulling downwards. You then
will have to lift back the copper screen lifting from the left side.
Follow a line up from directly in between the two VRs approx 5mm above
mounted horizontaly is a 47k chip resistor . Remove it. Reassemble and
do a full reset. TX will now be activated wide band.
Due to the extreme miniturisation the job is not easy. You will need an
iron with a very small tip (battery powered) a good magnifying glass and
3 hands. I take no responsibility for this mod. Do it at your own risk.
However it worked fine on mine.
Larry G4OXY