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Scott Dorsey
 
Posts: n/a
Default setting bias (again) when there's no peak

mr c deckard wrote:
just curious: the usual instructions for setting bias is to turn the
bias control until it peaks, then continue until it decreased by the
correct amount (usually -3dB). on this pr99 i'm trying to nurse back
from years of public radio station duty (volunteer-staffed), the
needles are at their maximum at one extreme of the bias pot. i went
ahead and set it until the meter read the correct amount, and the high
frequency sounds good on playback, so i'm going with it, but, it bugs
me. it bugs me that the peak isn't within the bias pot's range. . .


What tape are you using? Are you sure you have enough bias to handle
it?

You did turn the level of the oscillator down so that the meters were
low enough that you could find the peak? But you still turn it all the
way to the right and it just keeps going higher?
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."