Vulcan resistor substitution

[jc]

I am going to build a vulcan overdrive in the morning. I don't have 4M7. It is being used to bias the input into the BJT (5089).

1.) Hold off and find the 4M7. (I have always found it difficult to find higher value resistors at RS)
2.) Use a 2M2 or 5M6 (I have these values...)
3.) use 2 2M2 in serial

Seems like #3 would be good enough.

Thanks!

[nelson]

Hi, I dont have the schematic or anything, but the resistor is probably just a pull down resistor, first resistor to ground after input?

just use a 2m2.

[petemoore]

  Possible those are big 'ol mosfet biasing resistors ..
  5M6 (I have these values...)
3.) use 2 2M2 in serial
  Something like 4m4 or 5m6 would probably suffice just fine, for bias, but there's probably another resistor that is 'compensatory'...
  112/94ths..probably close enough, don't have calculator handy
  4m4 would be 88/94ths...that's within the 10% tolerance 'drift' or 'grace' guideline. Should work fine

[aron]

I used two 2.2M resistors in series.