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48-1270 alignment
#1

I've recently recapped a 48-1270. Its working pretty well but I want to fine tune it to improve reception - I'm a little distant from good stations. The Philco service manual has pretty good instructions for alignment of the 48-1270, but I need a little more elaboration on the first alignment step for AM. The manual instructions for attaching the signal generator for step one reads as follows "Through a .1-mf condenser to aerial section of tuning gang." I am familiar with the stator section of the tuning gang, but I am having difficulty determining which part is the aerial section. I've tried to determine through schematic but can't be sure. So, I've tried this: There are two lugs on top of the condenser - one over each tuning section. When I touch the lug farthest from tuning cord with my finger the signal for a strong AM station gets considerably stronger. When I touch the lug closest to the tuning cord the signal disappears. Does this help discriminate between aerial and oscillator sections. I am guessing the first lug (farthest from tuning cord) is the aerial section. I sure would appreciate some help on this - don't want to mess this up really bad. Thanks.


Messages In This Thread
48-1270 alignment - by Bigreddog42 - 07-05-2021, 08:28 PM
RE: 48-1270 alignment - by morzh - 07-05-2021, 09:02 PM
RE: 48-1270 alignment - by Bigreddog42 - 07-06-2021, 10:41 AM
RE: 48-1270 alignment - by Bigreddog42 - 07-06-2021, 10:40 PM



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