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Model 14 Bakelite block question
#1

Hello all, and thanks for reading my newbie question.

I'm restuffing Bakelite blocks in a Philco 14 and just tackled part #44 in this Code 122 chassis, a Bakelite block labeled "3615-BM" identified in the parts list as a .1 uf capacitor.  Based on this information, I expected to find one capacitor in the block, but I found TWO capacitors.  The block has only two openings for interior cap leads.  I'm confused by the presence of two caps and of, course, they're not labeled (other than the block itself).  Why am I finding two capacitors in a block intended for only one?  Were they coupling two caps to arrive at the intended value?

Thank you, in advance, for your replies and insight.

Mike
Amherst, WI

Mike, K9UW
Amherst, WI
#2

Hi Mike, It looks like there was a replacement in the block capacitor Index.the 3615 BM was replaced with a 3615ODG which is 2 (two) .05 caps.

  http://www.antiqueradios.com/philcorestorer/page10.html
http://www.antiqueradios.com/philcorestorer/page9.html


Hows that dial coming along?
#3

(12-18-2014, 05:58 PM)doug-5er Wrote:  Hi Mike, It looks like there was a replacement in the block capacitor Index.the 3615 BM was replaced with a 3615ODG which is 2 (two) .05 caps.

  http://www.antiqueradios.com/philcorestorer/page10.html
http://www.antiqueradios.com/philcorestorer/page9.html


Hows that dial coming along?

Hi Doug!

The 37-11 dial project is on the back burner until the replacement dial arrives from RadioDaze. Figured that I might was well mount the new dial before engaging in the struggle to get the mechanics working correctly. That order was placed two weeks ago, and I'm still hoping it arrives by Christmas.

Thanks for the links that update and define that block. That explains the two caps in the block, but the leads came up through only two holes (the third hole in the block was unoccupied). After posting my query, I carefully pried out the caps and found the leads from the two caps wound together at one end. The other end was too disturbed to assess.

In a situation like this, where the service bulletin says there are two .05 uf caps in the block and the radio's parts list says the part is .1 uf, I'm inclined to think that they used the block's two .05 caps in parallel to achieve the .1 value required in the circuit?

Confession: I actually like re-stuffing Bakelite blocks!

Mike, K9UW
Amherst, WI

Mike, K9UW
Amherst, WI
#4

That would be my guess as to the 2- .05 caps. A .05 is 50000 mmF,A .1 is 100000 mmF. Don't know if you have one of these but they are a great thing to have on your bench or work area.Print the link and keep it handy Icon_biggrin Icon_biggrin 

http://www.turretboards.com/capacitor_co..._chart.htm
#5

Lots of times substitutions in production runs were made according to what was on hand, and rarely documented. That's why this is so much fun.




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