You can find it in the Rider schematic collection, Volume 15. Volumes 13-16 are available on CD, the entire 23 volume collection on DVD or you can get the individual schematic, alone.See www.RadioEra.com.
Here's a link directly to the 24 volume DVD.
Here's a link to the Volumes on CD. (Scan down the page for RIDER’S "PERPETUAL TROUBLESHOOTERS MANUAL")
And here's a link to individual schematics.