[Motorola] Syntor X

[KBØNLY]

The Syntor X most commonly uses an EEprom, not a prom.  Some of the early 
units had a white label memory module in them that used a one time burnable 
prom, the later orange label memory modules use an 28C16 24 pin EEProm. 
Simply pop it apart and pull the EEprom, toss it in a eprom burner and write 
a new image to it.  Been there done that plenty o' times.

I suspect that some may be thinking of the earlier Syntor, that radio used a 
one time burnable prom, nearly impossible to find a blank one for it, and 
there is a way to build an adapter for it to use an EEprom instead.

Also, the Syntor X can be made into one really nice frequency agile computer 
controlled radio, and now a standalone frequency agile rig.  Look at Piexx, 
they make a replacement for the memory module which makes the radio computer 
programmable and yet still retains it's stock rotary or sys90 pushbutton 
heads, they also make a complete retrofit which replaces the personality 
board with a new interface that then allows you to connect it to and run it 
as a software operated radio with your computer, or, add the optional 
control head and take it mobile and still have it frequency agile.

They also offer a retrofit for the earlier plain old Syntor in case you have 
one you wanted to use.

On another note, the Syntor X makes a great repeater receiver or 
transmitter, I recently authored an article for the Repeater Builders 
Technical Information Page, RBTIP, which shows how to modify the radio to 
bring out the signals needed by the controller as well as configure it to 
run without any control head.  Just supply power and hook it up to your 
controller.  Sure, it takes two radios to make a repeater since they can not 
be duplexed, but wire and program them the same and you can swap if any 
failure puts the repeater off the air at in inopportune time to make the 
repair.

They also make a great packet rig, APRS, digipeater, whatever!