09-20-2009, 10:38 PM
Interesting construction of the capacitor pack.
Tools: one vise clamped to a picnic table, pliers, a large screwdriver and a propane torch. Heat both sides until the packing melts, then grab the wires with the pliers and pull the packing out.
There are three paper capacitors (C64-C66) were held together side-by-side with a rubber band. Three resistors (R23, R24 and R26) lay across the capacitors. One is 0.1watt and two were 0.25 watt. The bundle was wrapped in thick paper, inserted in the rectangular cannister and filled with tar of unknown origin or toxicity.
I'll assemble the new capacitor and resistors in similar fashion but will omit the tar unless someone knows better. I'm not sure why the pack was filled with the tar unless excessive heat or fire was a concern. Rather than cobbling together a couple of half-watt resistors to make replacements, I've got some one-watt resistor with the exact ohms and I'll use those along with the yellow metalized polyester film capacitors. Cardboard from a cereal box or beverage pack should provide sufficient insulation.
The radio came with a book, RCA Receiving Tube Manual. Very helpful in identifying the pins that were not clear in the schematic. This part of the circuit is connected to the grid so voltage (watts) shouldn't be an issue. That's my look at it.
Tools: one vise clamped to a picnic table, pliers, a large screwdriver and a propane torch. Heat both sides until the packing melts, then grab the wires with the pliers and pull the packing out.
There are three paper capacitors (C64-C66) were held together side-by-side with a rubber band. Three resistors (R23, R24 and R26) lay across the capacitors. One is 0.1watt and two were 0.25 watt. The bundle was wrapped in thick paper, inserted in the rectangular cannister and filled with tar of unknown origin or toxicity.
I'll assemble the new capacitor and resistors in similar fashion but will omit the tar unless someone knows better. I'm not sure why the pack was filled with the tar unless excessive heat or fire was a concern. Rather than cobbling together a couple of half-watt resistors to make replacements, I've got some one-watt resistor with the exact ohms and I'll use those along with the yellow metalized polyester film capacitors. Cardboard from a cereal box or beverage pack should provide sufficient insulation.
The radio came with a book, RCA Receiving Tube Manual. Very helpful in identifying the pins that were not clear in the schematic. This part of the circuit is connected to the grid so voltage (watts) shouldn't be an issue. That's my look at it.
