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mockman 2.0 troubles

Started by arawn, January 07, 2010, 08:05:14 PM

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arawn

January 07, 2010, 08:05:14 PM
Just finished the mockman 2.0 and I am having some trouble. Actually 1 trouble I don't know what vref is supposed to be. Signal passes through the entire circuit, but I have low output and the only problem I can find is that vref is possibly too high on pins 3 and 5 of the opamp Vin is 9.81 on a regulated supply, and Vref is showing as 9.35 on the same pins. Is that too high a bias? could that cause low output ?
"Consistency is the Hobgoblin of Small Minds!"

Gus Smalley clean boost, Whisker biscuit, Professor Tweed, Ruby w/bassman Mods, Dan Armstrong Orange Squeezer, Zvex SHO, ROG Mayqueen, Fetzer Valve, ROG UNO, LPB1, Blue Magic

petemoore

#1
January 07, 2010, 11:00:43 PM
  Vref I think is created using 2 series, equal value resistors [divider] across the PS rails.
  This will provide a Vref = 1/2v of supply [4.5vdc if 9v battery].
Convention creates following, following creates convention.

arawn

#2
January 08, 2010, 05:03:53 PM
I suspected as much
now to figure out where I went wrong
"Consistency is the Hobgoblin of Small Minds!"

Gus Smalley clean boost, Whisker biscuit, Professor Tweed, Ruby w/bassman Mods, Dan Armstrong Orange Squeezer, Zvex SHO, ROG Mayqueen, Fetzer Valve, ROG UNO, LPB1, Blue Magic
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