Thread: 56 Philco
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Old 10-18-2005, 11:53 AM
Don Lindsly Don Lindsly is offline
Ex-Philco
 
Join Date: Jul 2005
Location: Colorado
Posts: 450
Sorry I do not have a volume knob for that model. I have some bar-over-knob pieces, but they are for models with a range switch.

Sound trouble on that TV usually comes from a bad discriminator transformer (32-4631-1). There should be plenty of those around. Make sure you have eliminated the usual suspects like the 6AU6, 6T8 and the 2uf electrolytic under the 6T8.

That TV is one of the simplest to align. The Philco service literature has the AM pre-peaking and trap frequencies marked on it. You will need a bias pack to stabilize the AGC. If you don't have one, a 9 volt battery and 100K pot will work. The RF feeds into a test point on the tuner. Connect the scope vertical to the video amp grid or detector output. Remove the RF amp to minimize interference from local stations. You can usually get by without a sweep generator. If you align the coils and traps per instructions, the curve comes out surprisingly close. Don't start until you are sure the IF and mixer tubes are all good and shields are in place. It won't line up if the bottom shield is missing or loose.

Trivia note: The "E" Model number designates your set as a '57 model year. The 330 series chassis came out in '56 and some were carried over for the '57 line.

Don

Last edited by Don Lindsly; 10-19-2005 at 11:05 AM.
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