[jtiner]

I built one of the external antenna adapters and have been using that off and on in my testing. To rule out possible harmonics or other oddities in my generator, I'm finding broadcasts on my Zenith TO, say at 11.5 MHZ, then moving the Philco's oscillator adjustment to find the strongest image of that station at 11.5 on the dial. That does indeed place the LO above the tuning frequency, which is counter to the results following the alignment instructions. But that does match how the "police" band is set. However, what I'm finding is that the LO is tracking very badly, so the lower end of the band is very far off. The BC and "police" bands track very well. I'm taking a break for a while because I've been at it too long today. Thanks for sharing your experiences. That's helpful information.