The Syntor and MCX-100 (Canadian Syntor) both use a bipolar EPROM for the programming and must be burned with a EPROM programmer.
If you want to create an image file to burn a EPROM for a VHF Syntor, you can use this freeware program.
To use your Syntor VHF/UHF in the ham bands will require some modifications, click here to download modification instructions.
If you want some more information on programming the MCX-100, check here.
To program the Syntor X and MX-300 you need the R-1801 suitcase programmer.
For Syntor X users we have a treat for you! Click here for a freeware Syntor X programmer.
NOTE: This programmer is meant for the 2m ham band. It has had the bandsplit opened up to cover 140-190 MHz but not all frequencies may work (Motorola does some goofy calculations here and there). We have not tested it or played with it (we don't have a Syntor), .
Paul, N7OCS, can help you if you need to program the above radios, contact him at [email protected] or visit his web site at http://www.geocities.com/SiliconValley/5857.
Another source of help is Sandy, and you can contact him through his web page.
Programming a Syntor Out of Band
Motorola's R1801 programmer will not program the Syntor radio out of the commercial band. However, there is a way to do it by a little skullduggery that is quite simple. To get the radio to transmit out of band you have to make the VCO use a offset of 10.7 mhz by connecting the PROM pin #15 to the other side of the PTT invertor which is found under the top lid pusher spring.
There is a 4.7k resistor there and the end toward the PROM is the one that you want to use or check and see which end responds to PTT. Just bend pin #15 out and plug the PROM in and jumper pin #15 to the 4.7k resistor.
In order to make this work, you must program the PROM backwards by making the RX inputs for TX + 10.7 and TX inputs for RX + 10.7. Be careful not to get them reversed. The actual frequency will be 10.7 mhz lower than frequency entered. The receiver will be high side injected.
If you can understand this, it is a simply transposed the VCO from RX to TX as the TX frequency is used for high side injection for the RX and the TX frequency is the injection for RX frequency + 10.7. This may be confusing but think about it and you will see why it works.
This extends the range of the radio down 10.7 mhz by doing this. The other problem would be the PL's. We don't have a way to program the PL PROM and the only other way is to use a Comspec 32 PL generator or use your imagination. This has been proven to work and you can program 32 channels into the radio.
If you have any question about this modification, email [email protected].