Tranor YBA-2A/B Resistor

[AMPREPAIR]

I am installing new caps and tubes in an old Tranor YBA-2A/B. While installing new capacitors, I made an odd discovery: The schematic shows a 4.7K (R19) and a 10K (R20) installed across the terminals of the 40/40/40 filter capacitor. I was surprised to discover the resistor installed at R19 has a color code of YELLOW, VIOLET, BROWN, SILVER. To me, this is a 470 ohm resistor, not a 4.7K as shown in the schematic. When measured out-of-circuit, the resistor shows 6.1K on the meter. I can understand a 4.7K carbon resistor changing to a 6.1K over time, but a 470 ohm resistor changing to 6.1K seems a bit much.

Incidentally, the resistor is in great shape without signs of being overheated. My forensic approach tells me that a red band could change to brown if subject to a lot of heat, but the resistor is in excellent condition without signs of heat and the BROWN band is consistent in color all around the resistor. The other color bands are also very vibrant and consistent.

My question is this: Should I replace R19 with a 470 resistor (as indicated by the actual part) or a 4.7K (as indicated by the schematic)? I would like to understand the best resistor to use, rather than just replacing it.

Any guidance is appreciated

[jmaf]

Got a photo of it for the more curious souls?

[Bruce / Mission Amps]

I doubt it.... It sounds more like the color on the original 4700 ohm resistor simply changed from orange to brown due to too much heat over a long period of time and you probably should check the old power tubes for a bad screen in there.... etc.
Use a 2 watt Metal Oxide 4k7 resistor.... it is dropping 50vdc.... 50/4700=10.6ma 10.6^2*4700= 1/2 watt... but that is at idle...

[g1]

Like Bruce said, probably a colour change on the resistor. Not even necessarily from heat, could have had an issue with the red paint, that resistor is probably 40 yrs. old. 6K is not that far off from 4k7 (+30%), I would think if it had been a 470 that opened up, it would have opened up to a much higher resistance, not so coincidentally close to 4k7.
I've had trouble before discerning whether a band was red or brown, they can look real close, sometimes even on new resistors.