[morzh]

I do not know what to make of the colors but it is either 250 or 70 Ohms bias resistors.
It is easy to determine - measure the other end of the resistor to the Chassis: if it is a short then it is the 70 Ohm, if not - then 250.

I think it is not 2M resistors as it is soldered to the "left" hence the lower (on the sch) pin of the pot, which goes to the 0-Chassis 250-70 Ohm divider. The 2M goes to the right pot's pin.

PS. You can look at my 38-15 post (about last spring), there is possible detector (dual diode) circuit mod that may or may not be there. In case you find the discrepancy - Ron pointed me to the document that describes it.