08-16-2015, 10:17 PM
Yes, the Philco P-274 battery is still there so if I can separate the outer printed cardboard from the guts of the battery I can make the replacement. Its voltages are A+ @ 9v and B+ @ 90v.
The IR5 tube was indeed cracked and you could easily see the crack after taking the tube out. Good call Terry. The IU4 tube is also bad.
I moved the thread to the electronic restoration as I've started to take a look at the chassis. Here's the underside. You can see that one of the components has failed completely. I believe its C15 in the schematic based on its position in the circuit, although I've not come across a cap that looks like the one in the photo before. Looks more like a resistor or coil. Anyone seen a cap that looked like that, perhaps a later repair??
[Image: https://www.dropbox.com/s/8mbx2uyqj9q4pm....jpg?raw=1]
Close up of failed cap
[Image: https://www.dropbox.com/s/obiw7qs8cnkc4j....jpg?raw=1]
The IR5 tube was indeed cracked and you could easily see the crack after taking the tube out. Good call Terry. The IU4 tube is also bad.
I moved the thread to the electronic restoration as I've started to take a look at the chassis. Here's the underside. You can see that one of the components has failed completely. I believe its C15 in the schematic based on its position in the circuit, although I've not come across a cap that looks like the one in the photo before. Looks more like a resistor or coil. Anyone seen a cap that looked like that, perhaps a later repair??
[Image: https://www.dropbox.com/s/8mbx2uyqj9q4pm....jpg?raw=1]
Close up of failed cap
[Image: https://www.dropbox.com/s/obiw7qs8cnkc4j....jpg?raw=1]
