[Hallicrafters] SX-17 BFO Question

[Joe Connor]

I'm having trouble troubleshooting the BFO in this receiver and I need help. Here's the most legible schematic: http://bama.edebris.com/manuals/hallicra/sx17/  When I first got the receiver, the BFO was loud and strong but it got very weak as I went through the recap procedure and it is now still very weak.

Here's what I've done: checked the 6J7 tube and tried several replacements, replaced the two wax paper caps in the BFO compartment, checked the resistors in the BFO compartment, tried adjusting the trimmer on the BFO can, tested the BFO pot and switch. All the BFO voltages are good per the manual. 

I'm wondering about C-62, the 10 pf cap that couples the BFO to the 6R7, second detector. Is that a possible culprit? The manual says that it's mica but it's tubular and about the size of a very small resistor. Does that sound right? Can I replace it with a silver mica? Since I probably don't have 10 pf in my parts drawer, does 51 pf sound reasonable? Any other ideas?

As always, thank you for your help and guidance.

                                              Joe Connor