05-13-2020, 12:21 PM
I just completed the IF portion of the AM alignment the best I could. The AM IF cores on the top side bottomed out as the signal was still increasing. The AM band is much stronger than it was but because signal was still increasing on the top side adjustments it probably could be better. The bottom side of both 1st and 2nd IF adjusted correctly. One curious thing I noticed is I also have a 51-1734 and the RC circuit (R15 and C19) coming off the oscillator coil and going to the grid of the 7F8 converter tube is 1k for R15 on 51-1734 and schematic and 1.5k on 51-1733. This would probably affect the oscillator frequency but would it also prevent proper IF alignment? Should I put a 1k in there at R15 where the 1.5k looked original on the 1733.