12-18-2020, 12:50 PM
This is my first post.
http://www.nostalgiaair.org/pagesbymodel...013884.pdf
#56 in schematic
This is my first foray into the Philco bakelite blocks. The regular ones go just fine. I have the master key with the connections and the discontinued's, etc. My problem is with the metal encased blocks, specifically 4989-k, noted as a 0.18mfd or, actually, two 0.09's. There is no actual bakelite in this condenser bank.
Upon dissection of the old capacitor, there were 2 halves in the tar, separated by a paper insulator. I could find no connection between the 2 halves. There is no number on the metal case.
3 wires come out one end of the block. A bare ground wire to the metal case (subsequently grounded to chassis) was present on other end.
One half of the bank is wired to the filter choke and the rectifier tube.
The other half is wired to the electrolytics, the other wire to the ground as noted above.
Again, no apparent connection between the halves of the condenser block.
I have to admit my sophomoric level of understanding with regards to reading schematics.
My question regards rebuilding the block:
Should I re-wire it as I dissected it, using a 0.1 mfd in place of each side of the bank, or try to directly place them in parallel and somehow then make the connections?
Thank you, in advance.
Brian
http://www.nostalgiaair.org/pagesbymodel...013884.pdf
#56 in schematic
This is my first foray into the Philco bakelite blocks. The regular ones go just fine. I have the master key with the connections and the discontinued's, etc. My problem is with the metal encased blocks, specifically 4989-k, noted as a 0.18mfd or, actually, two 0.09's. There is no actual bakelite in this condenser bank.
Upon dissection of the old capacitor, there were 2 halves in the tar, separated by a paper insulator. I could find no connection between the 2 halves. There is no number on the metal case.
3 wires come out one end of the block. A bare ground wire to the metal case (subsequently grounded to chassis) was present on other end.
One half of the bank is wired to the filter choke and the rectifier tube.
The other half is wired to the electrolytics, the other wire to the ground as noted above.
Again, no apparent connection between the halves of the condenser block.
I have to admit my sophomoric level of understanding with regards to reading schematics.
My question regards rebuilding the block:
Should I re-wire it as I dissected it, using a 0.1 mfd in place of each side of the bank, or try to directly place them in parallel and somehow then make the connections?
Thank you, in advance.
Brian
