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HP 339A oscillator problem
HP 339A oscillator problem
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Old Yesterday, 06:09 PM   #141
microx is offline microx  Spain
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Location: Alicante
R21 and R22 both measure 176K colour bands are very faint cant read and cannot find any Manual Change
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Old Yesterday, 06:21 PM   #142
BSST is online now BSST  United States
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Join Date: Jul 2018
Interesting. These two resistors are both 24.9K on my schematic. No worries. Let's repeat a VM test from a while back: if you place VM leads between TP1 and U3C pin 9, difference should be less than 10 mV. Same should be true at TP2 vs. U5D pin 9.
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