Rod, I do have a schemaqtic for the DRSI PCPA2, which I will mail to u tomorrow. 73 Frank W3LPL donovanf@sgate.com -- FAQ on WWW: http://www.contesting.com/towertalkfaq.html Submissions: towertalk@contesting.com Administrative requests: towertalk-REQUEST@contesting.com Problems: K7LXC@contesting.com Sponsored by Akorn Access, Inc & KM9P