The Radio Information Board

For anyone who might need it, here is the (rare?) schematic of the Maxon SMP-4004C programming adapter, used with the Maxon SM-4150 and SM-4450 mobile radios. This adapter may also be compatible with the GE Monogram series of radios, using the software for the Monogram. I sent an email to the wetsn...

Have you got any info on the Maxon SMP4002 Programming lead or the circuit on how to make the 25 way D socket adapter / lead. I tried your email as listed on qrz.com but you appear to have changed email address.
73 de Jim gi0bjh@ntlworld.com