My apologies for this late reply - I've been out of town and out of contact for the last week. Just got home last night.
It seems likely that there are shorts between the grid and plate of the 6922 - i.e. C1 to C2 and C6 to C7 - or perhaps both stoppers (220 and 100 ohms) accidentally are going to the same pins. Inspect those pins closely looking for possible connections or bridging. If the problem does not appear there, it would be relatively easy to measure the resistance between C1 and C2, and again between C6 and C7. This will test the short-circuit theory, even if the connection is not at the tube pins. If you can post a picture or pictures of the C socket showing the wiring to each pin, we can see if anything seems amiss.
