I hope the mistakes you are correcting include replacing those old carbon composition resistors with carbon or metal film resistors, particularly those half-Watt jobbies. Probably should replace those tantalum caps too while you're at it.
I hope the mistakes you are correcting include replacing those old carbon composition resistors with carbon or metal film resistors, particularly those half-Watt jobbies. Probably should replace those tantalum caps too while you're at it.
I'm in the device's oscillator circuit right now - but the whole thing is carbon comp resistors. Trying to correct some of the drift, I replaced all the associated parts with some mil-qualified metal film parts from my stocks. The device would drift 10 counts out of 85 on warmup, now it's 2 in 85.
I'm not replacing the rest since those don't really matter, it's the oscillator that does the dirty work here. The rest of that 1970s shit can stay where it's at.
I'm in the device's oscillator circuit right now - but the whole thing is carbon comp resistors. Trying to correct some of the drift, I replaced all the associated parts with some mil-qualified metal film parts from my stocks. The device would drift 10 counts out of 85 on warmup, now it's 2 in 85.
I'm not replacing the rest since those don't really matter, it's the oscillator that does the dirty work here. The rest of that 1970s shit can stay where it's at.
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