Bill:

I'd suspect screen bypasses and cathode bypasses if the receiver is very
old. By all means disconnect one end of a resistor unless it connects to a
tube in which case you can pull the tube while measuring. If two resistors
are in parallel, the other one could be faulty , givign you a false
measurment.

Ralph VE3BBM
"Bill Ogden" wrote in message
...
Really stupid question: When checking resistors while restoring an older
receiver, is it common to attempt to check the resistor while it is in the
circuit? That is, make a guesstimate of the parallel resistance (working
from the schematic). Or, should I disconnect one end of each resistor to
check it?

(Am working on an S-85. Have replaced most capacitors. No hum and the B+
voltages are OK, so the original power supply capacitors seem OK. General
sensitivity is still low, so resistor checks seem to be next on the list.
IF and RF alignment are OK. The last owner had the local osc above the
signal on band 4, which was the only serious problem. Tubes are OK, I
think.)

Why an S-85? It was my first receiver, way back when (with a Heathkit Q
multiplier).

Bill - W2WO