Philco model 70 tone capacitor - Printable Version

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Philco model 70 tone capacitor - Tubesforme - 08-08-2016

Does anyone know the correct value of the tone capacitor used on the Philco Model 70, before serial #B22,000? The schematic calls out the item as #48. In the parts list all that is listed is Tone control part # 03140.

I know that anything from .01 to .05 would work, but I would like to know the original value, if anyone knows it. I attempted to measure it with my capacitor checker, but it will not settle down and indicate a particular capacity, it varies all over the scale, meaning the capacitor is leaking.

Thank you.

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RE: Philco model 70 tone capacitor - Nathan Slingerland - 08-08-2016

There's a discussion of the value here:
http://philcoradio.com/phorum/showthread.php?tid=3191

Another great resource is the book 'Philco Condensers and More' by Ray Bintliff - Ron has details on it here: http://philcoradio.com/phorum/showthread.php?tid=14964

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RE: Philco model 70 tone capacitor - morzh - 08-09-2016

.015 uf is the value of the 03140 tone control.

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RE: Philco model 70 tone capacitor - Tubesforme - 08-09-2016

(08-09-2016, 08:03 AM)morzh Wrote:  .015 uf is the value of the 03140 tone control.

Thank you, that happens to be the value I had thought I would use. Thank you for your confirmation. Tubesforme

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