?

The crystal from the SX-71 did the same thing in the test setup, with the signal generator and scope.? For now, I’ve returned the original crystal to the SX-110 and am going through the IF alignment again, but this time with more knowledge about the resonant frequency.? Want to see where I land and more about the effects of repositioning the radio (on its side, right side up, etc).? The new(er) 455 KHz crystal will be here in a few days – I’ll swap it out then and we’ll see what effect that has, following another alignment.

?

73 – Steve, KW4H

?

Steve … doing the same thing in the test setup or in the receiver or both?

I am a curious reader at this time

Don VA3DRL

?

?

Yeah, I ordered a couple of 455 KHz crystals today.? It would be good to have another on hand.?

?

FYI, I stumble onto these things because I restore boat anchors (mostly receivers) for educational and historical purposes.? I also write articles for ER magazine, and the extra information is fun and interesting.? Anyway, I’m more likely to remove a component and test it out of curiosity rather than questioning the design.? The unstable crystal caught me by surprise! ?And just for the heck of it, I pulled a similar crystal out of a SX-71 awaiting restoration and it’s doing exactly the same thing.? Still mulling that over.

?

73 – Steve, KW4H

?