07-19-2008, 01:54 AM
Hello Philco Fans,
Just a little background on me. I've got an associates degree in electronics, but it has taken only a short time to realized that only gets me started in restoring vintage radios. I am quickly learning how much I don't know.
I've restored 3 vintage radios so I had an intoduction into the world of tubes, and alignment, and plates, and heaters, etc. But this is my first Philco.
When I first fired it up it had an obvious filter cap hum, so the first thing I did was replace the two 20uf C15 I believe, and that cured that problem. Then I replaced all the capacitors, except I had to order the 40uf/10uf combination as 2 capacitors. There not here yet. The ones in the set were toast, only 1 had any capacitance at all.
I blew a 50x6 by connecting my signal generator negative probe in the wrong place. Today my replacement tubes came in so I put the bad 40/10 back in to see if would still give me enough sound to align the IF frequency. Nothing...
I have removed a .2uf cap with a wire wrapped around and around it. I have been told that I don't need this. Is that true? I have it out now, and it had more leads on the bottom than I expected and as a result I have lost track of where it hooks up. I have a good schematic and voltage chart so my question is should I put it back in or will it work without it.
Like I said, before I started it was making lots of noise but now it's making no sound...Neal
Just a little background on me. I've got an associates degree in electronics, but it has taken only a short time to realized that only gets me started in restoring vintage radios. I am quickly learning how much I don't know.
I've restored 3 vintage radios so I had an intoduction into the world of tubes, and alignment, and plates, and heaters, etc. But this is my first Philco.
When I first fired it up it had an obvious filter cap hum, so the first thing I did was replace the two 20uf C15 I believe, and that cured that problem. Then I replaced all the capacitors, except I had to order the 40uf/10uf combination as 2 capacitors. There not here yet. The ones in the set were toast, only 1 had any capacitance at all.
I blew a 50x6 by connecting my signal generator negative probe in the wrong place. Today my replacement tubes came in so I put the bad 40/10 back in to see if would still give me enough sound to align the IF frequency. Nothing...
I have removed a .2uf cap with a wire wrapped around and around it. I have been told that I don't need this. Is that true? I have it out now, and it had more leads on the bottom than I expected and as a result I have lost track of where it hooks up. I have a good schematic and voltage chart so my question is should I put it back in or will it work without it.
Like I said, before I started it was making lots of noise but now it's making no sound...Neal
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