01-29-2023, 01:39 AM
Hi and welcome,
You inherited one of the 1938 conecentric Philcos. Only a few models used that tuning system and it was a '38 only thing. Here's the service info for your chassis https://philcoradio.com/library/download...l.%202.pdf For starters you'll need to replace #3 .05 mf 630v,#11 10mf 450v X2,#14 .1 mf 630v,#24 .01 mf 630v,#28, .015mf 630v #30, .1mf 630v #34, .015mf 630v #37, .033 630v #38, .006 630v #40, .008mf 630v #45 22mf 450v, and #47 and dual .015 mf @ 600v safety caps.
#11,11A and 45 are electrolytic capacitors, the others are mylar or film capacitors. Some of the values I tweak a little as they are not common any more.The issue w/these parts is that they degrade over the years and can internally short. This is bad. It can damage other parts in the set or worst case could cause a fire [Image: https://philcoradio.com/phorum/images/sm...n_evil.gif] Most of the time they are electrically leaky. Which means that they cause excessive current flow which taxes parts in the power supply circuit. Here's a link to where a lot of us get are caps. http://www.tuberadios.com/capacitors/
GL w/your new project.
ps Saw John's post and you miss the rubber wire by a year. That's a '39-42 thing.
You inherited one of the 1938 conecentric Philcos. Only a few models used that tuning system and it was a '38 only thing. Here's the service info for your chassis https://philcoradio.com/library/download...l.%202.pdf For starters you'll need to replace #3 .05 mf 630v,#11 10mf 450v X2,#14 .1 mf 630v,#24 .01 mf 630v,#28, .015mf 630v #30, .1mf 630v #34, .015mf 630v #37, .033 630v #38, .006 630v #40, .008mf 630v #45 22mf 450v, and #47 and dual .015 mf @ 600v safety caps.
#11,11A and 45 are electrolytic capacitors, the others are mylar or film capacitors. Some of the values I tweak a little as they are not common any more.The issue w/these parts is that they degrade over the years and can internally short. This is bad. It can damage other parts in the set or worst case could cause a fire [Image: https://philcoradio.com/phorum/images/sm...n_evil.gif] Most of the time they are electrically leaky. Which means that they cause excessive current flow which taxes parts in the power supply circuit. Here's a link to where a lot of us get are caps. http://www.tuberadios.com/capacitors/
GL w/your new project.
ps Saw John's post and you miss the rubber wire by a year. That's a '39-42 thing.
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
