[Texasrocker]

Just like Ron said, always test your RF generator feeding into a Freq Counter to make sure your test gear is accurate or your chasing yourself round in circles on alignments. For serious radio restorers using vintage RF generators only, a Freq meter is a must have item to keep accuracy. Most just get close with a tone generated from older RF gens on one end of the dial sometimes. If you dont have a freq counter, a portable radio with digital crystal controlled tuning can be used to track your RF generator for spot on first, seconds, & third harmonics. I have a old Radio Shack model DX-375 that covers most bands I keep on my bench so I dont have to bring out the Freq meter. Just takes a little practice. In all my many restorations over many years, I only had one radio that needed the mica replaced from rot on the tuning cap. It was a Zenith 7G-605 that had been used during WW2 and stored in a damp environment for many yrs. I only use my ears to "peak up" the I.F. transformers , and never trust my vintage RF generators, even though they produce a fairly accurate signal across the bands. I have a old dual trace scope here I need to restore, but a freq meter works great for servicing old radios and making sure your RF gen is spot on. I never cared for tube testers much either, even the best Hickoks high-dollar models can lie. The best test for tubes is under proper operating conditions in the set(s) the tubes were designed for. Just my .02