01-13-2008, 01:07 PM
Hello Philco Gurus,
This is my first post here, in addition to my first radio restoration! Of course, it is a Philco, a 610 tombstone. I heard that if you have a problem or question, this is the place to come.
I am very new to electronics and restoration, so please bare with me at what might seem elementary questions for you veterans.
OK, here goes. My radio hums (big suprise huh?). I replaced all the paper capacitors last night. Everything checked out fine with my work. I was ready to replace the three "Can" electrolytics when I hit a road block.
Here is the schematic I have been using:
http://www.nostalgiaair.org/PagesByModel...013797.pdf
The three caps are:
Schematic #41 16-uf Part No. 30-2118
Schematic #56 8-uf Part No. 30-2025
Schematic #54 8-uf Part No. 30-2025
I have all of the correct value elecrolytic replacements I believe. 3 new caps in all, they are all axial type (2) 8 uf caps and (1) 16 uf cap.
This is what I am unsure of:
I have attached a few photos. Hopefully they post, if not please paste the link into your browser. The first is of the chasis top, second is of the #41 16-uf cap. underneath, the second is of both the #41 and #56 caps underneath.
Chasis Pic:
http://good-times.webshots.com/photo/271...6006gFZDvI
#41 Under Chasis Pic:
http://good-times.webshots.com/photo/212...6006dbUBqW
#56 and #41 Under Chasis Pic:
http://good-times.webshots.com/photo/208...6006AVdlMO
Before I start my questions, I do know that I need to disconnect the caps.
Okay, my question are the following. In pic number 2 (#41 cap), why is there 2 terminals? There is nothing in the schematic that says it has 2 caps inside the can. There is also nothing in the schematic that tells me the (+) or (-). I noticed that the cap. is insulated from the chasis. Does this mean that the terminal on the outer rim is the ground? That being said, do I solder the (+) lead of the new cap to the wire leads that were connected to the center downrod and the (-) lead of the new cap to the wire leads that were connected to the terminal on the outer rim? I am confused and don't want to destroy this beauty!?!?!
Secondly, in the third pic of both caps. On cap #56, do I solder the positive lead of the new cap to the wire leads that were connected to the downrod? There is only one terminal on this cap. I assume this cap is grounded by the chasis correct? So where do I solder the (-) lead if the chasis is the ground (I do not know where to solder the (-) ground lead on the new cap. if the chasis is the ground on the old cap...please help). I know this last question is elementary, but please bare with me.
Any help would be greatly appreciated.
Thanks in advance!
Nick
This is my first post here, in addition to my first radio restoration! Of course, it is a Philco, a 610 tombstone. I heard that if you have a problem or question, this is the place to come.
I am very new to electronics and restoration, so please bare with me at what might seem elementary questions for you veterans.
OK, here goes. My radio hums (big suprise huh?). I replaced all the paper capacitors last night. Everything checked out fine with my work. I was ready to replace the three "Can" electrolytics when I hit a road block.
Here is the schematic I have been using:
http://www.nostalgiaair.org/PagesByModel...013797.pdf
The three caps are:
Schematic #41 16-uf Part No. 30-2118
Schematic #56 8-uf Part No. 30-2025
Schematic #54 8-uf Part No. 30-2025
I have all of the correct value elecrolytic replacements I believe. 3 new caps in all, they are all axial type (2) 8 uf caps and (1) 16 uf cap.
This is what I am unsure of:
I have attached a few photos. Hopefully they post, if not please paste the link into your browser. The first is of the chasis top, second is of the #41 16-uf cap. underneath, the second is of both the #41 and #56 caps underneath.
Chasis Pic:
http://good-times.webshots.com/photo/271...6006gFZDvI
#41 Under Chasis Pic:
http://good-times.webshots.com/photo/212...6006dbUBqW
#56 and #41 Under Chasis Pic:
http://good-times.webshots.com/photo/208...6006AVdlMO
Before I start my questions, I do know that I need to disconnect the caps.
Okay, my question are the following. In pic number 2 (#41 cap), why is there 2 terminals? There is nothing in the schematic that says it has 2 caps inside the can. There is also nothing in the schematic that tells me the (+) or (-). I noticed that the cap. is insulated from the chasis. Does this mean that the terminal on the outer rim is the ground? That being said, do I solder the (+) lead of the new cap to the wire leads that were connected to the center downrod and the (-) lead of the new cap to the wire leads that were connected to the terminal on the outer rim? I am confused and don't want to destroy this beauty!?!?!
Secondly, in the third pic of both caps. On cap #56, do I solder the positive lead of the new cap to the wire leads that were connected to the downrod? There is only one terminal on this cap. I assume this cap is grounded by the chasis correct? So where do I solder the (-) lead if the chasis is the ground (I do not know where to solder the (-) ground lead on the new cap. if the chasis is the ground on the old cap...please help). I know this last question is elementary, but please bare with me.
Any help would be greatly appreciated.
Thanks in advance!
Nick