[rfeenstra]

So I put this radio back on the bench.  I played with the dial lamp - it was all the way in.  I found a different 47 lamp that was slightly longer and had the filament way out at the end.  It improved the dial lighting a bit.

I hooked the IF section up to the spectrum analyzer to see what I could do with the response curve.  Here are the results:


IF peaked per alignment instructions. At 6 db down the bandwidth is about +-3.5k.

   


I looked at doing this.  At 6db down, bandwidth would be about+- 7K but the sensitivity is down a lot.

   


I settled in on this. At 6db down, bandwidth is about +- 6k.

   


At the loss of quite a bit of sensitivity, I gained a fair amount of bandwidth.  Still not as good as the Philco 37-116. The radio does sound better with my HiFi transmitter, though.  That's the way I usually use my AM sets.  If I listen to real broadcasts, it's usually talk radio so the high frequencies are not needed.

Kind of fun to play with!