[Radioroslyn]

The Field coil is 3100 ohms so it's pretty high as fc's go. You might removing the 71A's and see if the plate goes up to a more normal level. This may indicate that there is an issue with bias getting to the 71A's. Would check 35 & 33 that their ok and have a good ground connection. For what it's worth here's a voltage chart http://www.nostalgiaair.org/PagesByModel...029653.pdf Beware sometimes they don't measure the voltage from the chassis but from odd places like the B- rail or one the plates of the 80 over to one of the dc voltages. I find it confusing. This one doesn't say so maybe from the chassis...