Re: Ultra 761. Actually a T671.
20% often fitted and valve circuits can tolerate even 50%, except for cathode resistors or battery set HT- bias resistor, which indeed 10% is better.
The 68K reading 106K may or not matter depending where it is. If it's the Local Oscillator HT feed, then indeed it's too high. It doesn't much matter for a grid resistor.
Older resistors
No band = 20%
Silver = 10%
Gold = 5%
Newer resistors
green = 5%
red = 2%
brown = 1% (there is usually an extra value band, so Red, Yellow, Black, Orange, Brown = 270K 1%)
|