08-31-2014, 08:34 PM
Go to for a Philco 490k would be the common 470k. If if you want to be picky 510k can be had. 240k is plenty available. Alternatives are 220k and 270k.
Back before standardization resistors came in block numbers like 25k, 5k, 50k, etc. The modern system is staggered so that each 20% value meets the other and so on.
Add to that that Philco had an adversion to black bands as a help to the assembly people due to poor lighting. So 100k resistors were often painted as 99k, etc.
Back before standardization resistors came in block numbers like 25k, 5k, 50k, etc. The modern system is staggered so that each 20% value meets the other and so on.
Add to that that Philco had an adversion to black bands as a help to the assembly people due to poor lighting. So 100k resistors were often painted as 99k, etc.
