Bakelite block condensers - Printable Version

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Bakelite block condensers - TimC - 04-23-2010

Rebuilding bakelite blocks and got one (4989E) with a resistor in it.
What type/wattage resistor will suffice?

Carbon?
Wirewound?

1/4 watt?
1/2 watt?

Thanks and have a good weekend

Tim

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Re: Bakelite block condensers - exray - 04-23-2010

I think the answer is "yes, any of the above". What model is the radio for further verification of how it applies in the circuit?

-Bill

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Re: Bakelite block condensers - TimC - 04-23-2010

Hi Exray
Model 70 (early) inside the grandfather clock (570)

My diagram escapes me (in my mess) right now.
Block has a .09mf cap and a 250 ohm resistor.

Tim

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Re: Bakelite block condensers - denver - 04-23-2010

I used a 1/2 watt 250 ohm in mine . Ihad three of the boogers never could figure what the resisters suppose to do .

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Re: Bakelite block condensers - exray - 04-24-2010

Doing some quick math, a 1/4 watt is more than ample. Screen current of 1.7ma. P=I^2 x R (.0017 x .0017) x 250. = .0007 watts.

I don't understand why its in the circuit either? Maybe it helps prevent oscillations or something?

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