[morzh]

Jeff,

OK, I will ask again, as, short of your wire connecting cap #2 to resistor #8 being open, what you are saying is impossible.

Find the point where the two are connected.
Then:

1. Measure to the Grid Cap of the 6A7 (and BTW what does "So with grid cap not on 6A7 tube" mean? If NOT on the grid cap of 6A7, what is it on then?)
2. From the same point (the resistor and the cap connected) measure to the Grid Cap of the 78.

If however the Resistor and cap are NOT connected (remember, each has two wires so there are 4 possible combinations; if the wire connecting them is not strikingly obvious, try all for combinations, see if at least two pins are connected and then use THAT point as the point to measure to both grid caps). It is possible you are measuring from the wrong Res #8 pin.