02-07-2013, 01:44 PM
Hi,
I’m repairing an old philco model 18 (code 121). This radio is my dad’s and as far as I know it has never worked as long as I’ve been alive. So I decided to skip the trouble shooting and just go ahead and replace ALL of the capacitors and ALL of the resistors. I also repaired a ripped speaker, and rewired the speaker and outlet plug.
I fired it up, and there was sound, the light went on and all amp tubes are lighting up (orange glow really, had to replace 2 of them). However, there was a low sounding voltage drop—is the best way to describe it—and then no sound at all. I turned all the dials, and nothing more happened.
My next thought is to go through each connection, one by one, and verify that everything is connected to the proper capacitor, resistor etc. But before I do that, I thought I’d ask you for your thoughts?
Also, I took a 30 second video where you can see and hear what is happening. But this site won't let me attach it. What format does it need to be in? I tried changing it to 'mp4' but that didn't work. It's from my iphone and is a '.MOV' file.
I appreciate any help anyone can give me.
Thanks.
p.s. I'm totally new at this, but I am good at following directions. I printed the schematics online and have been using them as best I can. Some stuff though, I don't know what the heck it means.
I’m repairing an old philco model 18 (code 121). This radio is my dad’s and as far as I know it has never worked as long as I’ve been alive. So I decided to skip the trouble shooting and just go ahead and replace ALL of the capacitors and ALL of the resistors. I also repaired a ripped speaker, and rewired the speaker and outlet plug.
I fired it up, and there was sound, the light went on and all amp tubes are lighting up (orange glow really, had to replace 2 of them). However, there was a low sounding voltage drop—is the best way to describe it—and then no sound at all. I turned all the dials, and nothing more happened.
My next thought is to go through each connection, one by one, and verify that everything is connected to the proper capacitor, resistor etc. But before I do that, I thought I’d ask you for your thoughts?
Also, I took a 30 second video where you can see and hear what is happening. But this site won't let me attach it. What format does it need to be in? I tried changing it to 'mp4' but that didn't work. It's from my iphone and is a '.MOV' file.
I appreciate any help anyone can give me.
Thanks.
p.s. I'm totally new at this, but I am good at following directions. I printed the schematics online and have been using them as best I can. Some stuff though, I don't know what the heck it means.
