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40-190 image tuning, need help
Ron Ramirez
Silent Key
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Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana
#4

09-30-2007, 11:08 AM
I would take a serious look at that 2nd IF transformer (37). I would bet it is faulty, since you are unable to peak its trimmer at 455 kc. Bear in mind also that the AVC filter network (37B, 37C & 37D) are inside the IF can.

Many different 1940 or 1941 Philco chassis will yield the IF can you need to replace it; just be sure the replacement can has the AVC filter network inside. I see 40-150/155/180/185/190 chassis on eBay frequently, as well as 1941 model 41-250/255/280/285/287/290/296 chassis.

Once replaced, realign your radio for a 455 KC IF.

Good luck.
--
Ron Ramirez
Ferdinand IN
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Messages In This Thread
40-190 image tuning, need help - by BDM - 09-27-2007, 10:56 PM
[No subject] - by rickd - 09-28-2007, 09:36 PM
[No subject] - by BDM - 09-29-2007, 12:14 AM
[No subject] - by Ron Ramirez - 09-30-2007, 11:08 AM
[No subject] - by BDM - 09-30-2007, 02:47 PM



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