Bruce Romero wrote:

Looking for a power supply board for the r7a..Know any sources?

Your best bet is to sign up for the Drake List at http://www.qth.net/

Click on Directory of Email Lists, then scroll down to Drake, click on that and
go from there.

You can then ask in that forum, and either find a new board, or perhaps have
your old board fixed.

dxAce
Michigan
USA