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Cybernet 134 Chassis CB Radio's can be easily converted from the Ch9 priority switch to Ch19 priority by moving one wire on the
PLL track. The Brown/White wire needs un-soldering from the track going to pin  # and re-soldering onto pin #. (See pictures below
for more information) Clicking on the pictures will open a much larger view
This re-positioned wire is only part of the adaption as the display will still show Ch9. To make the display read 19 you will need 4 x
regular diodes and a piece of wire. Below is a picture of an untouched
PTSW154 AOX channel selector board followed by the two cuts
needed and how to solder on the 4 x diodes and connecting wire. Please pay close attention to the polarity of the diodes as they have
to be the correct way around. Where the two diodes join to the yellow link wire it is a floating joint and is
not soldered to the board
Why do I use yellow wire? no reason, I just happen to have plenty of yellow wire. It can be whatever colour you like of course, it
doesn't really matter. Something to bear in mind... Use the smallest diodes you have as there isn't much clearance space between the
Channel selector PCB and the case. Also be aware and make sure none of the diode wires are touching on any other bare pin
otherwise the channel display will be mixed up, I used some PTFE sleeving to try to minimise this happening. These pictures are of a
Fidelity 2000 I had in the workroom which I was adapting for the sole reason of writing this help page.
Above are various different angles of the diode adaption

As you can see on the picture to the left the Ch.9 priority
switch is on and the display shows 19. Job done.

As far as adaptions go this is quite a simple one and makes
perfect sense to me. If you are chatting on another channel
and want to quickly scoot back to the 19 if you are waiting for
someone else you can do it at a flick of a switch and return to
your previous channel by switching back. Saves a little time
and on the odd occasion I have forgotten after returning to 19
what channel I was originally on... no need to worry with this
adaption.
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CB Radio Repairers in the UK
CB Radio History from its early days