I had the opportunity to modify a few professional radios for amateur radio usage. This work was described on a previous version of my website and roughly copy-pasted, without formatting rework. Goal is to keep this information available. Sorry for the primitive page layouts.

Each radio has its own dedicated page:

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ASCOM SE-540 (VHF and UHF)
Motorola MC Micro
PHILIPS/PYE MX294 and MX296 or AUTOPHON SE-156

You will find pictures and some informations about these transceivers (and lots of other) at the rigpix.com site.