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In Reply to: RE: Fixed bias problem "fixed" or when it rains it pours. posted by sony6060 on January 19, 2017 at 16:45:02
which made a troubleshooting even more challenging. I suspected the fil trans early on but was loathe to change it out since that took the most work to deal with. And in combo with the LED, which i am sure caused some instability because it made the driver tube amplify some very high frequency signals.
Follow Ups:
LED's are not created equal, some are remarkably noisy. The low impedance, 'standard' Red LED from Agilent is among the best in terms of delivered impedance and noise. The 'high intensity' variants are all higher impedance vs the standard sort.
cheers,
Douglas
Friend, I would not hurt thee for the world...but thou art standing where I am about to shoot.
I dont see any part numbers or manufacturer marks.
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