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Philco 90 WW resistor question
JohnSchw
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Posts: 9
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Joined: Oct 2020
City: Centuria State, Province, Country: Wisconsin
#1

05-22-2022, 11:00 AM
I am working on a Philco 90 (1-47 tube) and the large 3-section WW resistor is bad.  I have found the values needed (180 ohm, 60 ohm, 3500 ohm), but am not sure of what wattage resistors I should replace them with.  I found on another thread that they should be replaced with wirewound resistors again for reliability reasons.  It also cautioned against using too high of wattage ratings?

How do I determine the rating?  The tube manual lists the 80 rectifier as having a max plate current of 125ma.  The spec for this radio lists the 80 plate current at 32ma.  Can I use the 32ma to calculate the wattage of these resistors, or are there other factors to consider?  I have yet to find a parts list that shows the wattage rating.

Thanks for any help.
John
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Philco 90 WW resistor question - by JohnSchw - 05-22-2022, 11:00 AM
RE: Philco 90 WW resistor question - by JohnSchw - 05-25-2022, 12:48 PM



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