[GarySP]

OK, gurus. Time to pick your brains a little.  I opened up my tester and found it to be in relatively good shape considering it's age.  I wanted to re-carbon it and change the only cap in it before firing it up, and install a new power cord.  It seems this is a later version of this tester, since it has a factory installed nine-pin socket.  My questions are regarding the resistors in this unit.  While most are old 1/2 watt carbons, about 6 of them are wirewounds.  Am I correct in presuming they used wire wound resistors because they had tighter tolerances than carbon of the time?  The schematic has the values for the wire resistors, but does not specify wattage of the resistors.  I haven't yet taken any readings of the resistors values.  Will do that this weekend.  My next questions are:  Are wire wound resistors subject to age drift like carbon resistors?  If I do elect to change the wire wound resistors, what wattage should I replace them with?  Only one has markings, and it is rated 10 watts.  Also, do I need to install wire wound replacements, or are 1% film resistors able to be used?  Any information provided is greatly appreciated!  Take care, Gary