04-23-2009, 11:40 PM
You're doing fine. Ceramic caps are OK, unless you are an Audiophile who wants gold foil caps immersed in virgin olive oil sealed in optical glass with silver leads. After all it is only a radio. Let's not go there.
You should also replace all the other ancient wax capacitors in the set too, as they will without doubt be leaky and way over tolerance before you do the alignment. Try to stay within 20% of the prescribed capacitance. While you are at it, measure and replace all resistors that are out of spec. All carbon resistors of yesteryear drift up in value ; replace them when they are more than 25% high. Or just replace them period. They ought to be costing you a dime or less per.
Don't replace he mica ones unless they are way out of line when tested out of line with the expected voltage applied to them. The little bitsy ones in the IF cans can fail at 12 volts DC, yet appear to have infinite resistance. Been there, done that.
After you are finished, align the set, and let us know how you are doing
You should also replace all the other ancient wax capacitors in the set too, as they will without doubt be leaky and way over tolerance before you do the alignment. Try to stay within 20% of the prescribed capacitance. While you are at it, measure and replace all resistors that are out of spec. All carbon resistors of yesteryear drift up in value ; replace them when they are more than 25% high. Or just replace them period. They ought to be costing you a dime or less per.
Don't replace he mica ones unless they are way out of line when tested out of line with the expected voltage applied to them. The little bitsy ones in the IF cans can fail at 12 volts DC, yet appear to have infinite resistance. Been there, done that.
After you are finished, align the set, and let us know how you are doing
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