Name:    Ed Goforth
Email:   goforthsound@yahoo.com  
Subject: 112 RD 50 bias
Thread:  216
Time:    Fri, 23 Nov 2001 03:28:44 UTC

Hi, From the schematics I have, the RD 50 amps have an auto biasing circuit, where the non RD amps have a trim pot for biasing. :)