resistors in bakelite caps - Printable Version

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+--- Thread: resistors in bakelite caps (/showthread.php?tid=687)

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resistors in bakelite caps - Doug K. - 07-04-2007

I am currently rebuilding the bakelite caps in my model 70. Cap #4989-E lists a 250 ohm resistor inside. Can I use a carbon film resistor to replace it or must I use a wirewound? Also, what wattage would this be and what tolerance? I have no 250 ohm resistors on hand but I do have a 270 ohm @ 1/2 watt . Would this be acceptable?
Only 2 more caps to do and one coil to be rewound - can't wait to see how it all works out. I did have a bad output trans replaced with a universal. No reception I attributed to the bad coil. Radio was in pretty good shape considering it was a curbside find...

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- Chuck Schwark - 07-04-2007

1/2 watt carbon or carbon film resistors are fine to re-stuff in combo bakelite block condensers. Small cardboard carded wire resistors were used for their smallness and low values made the bundle smallish as well.

A 270 ohm will be fine. Still well under the 20% tolerance of the older resistors.

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- Doug K. - 07-04-2007

thanks, chuck!

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- Chuck Schwark - 07-05-2007

I believe I mention this in my Re-Building page on my site for Bakelite Blocks.

Quote:"... Some of the Philco condensers also included a resistor (see chart). The original resistor is a small hank of light gauge resistance wire, in the required amount, wrapped inside a small kraft-paper wrapping. I assume from inspecting the size of the wire, that these resistors are rated at about a half-watt. Substituting a new carbon or carbon film half-watt part will work just fine."

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