Does anyone out there have a schematic or any information on a Silver-Marshall model "PRES"? Set uses 2 47's in push-pull and is close to a model "Q" but uses no 35's and has 3 27's.Having power supply troubles.Thanks.

Have you looked in the Riders Online section of this site. Under Silver Marshall the Model Q, Type 1 has two 47's and three 27's, no 35's.

Ed.