resistor wattage? - Printable Version
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: resistor wattage? (/showthread.php?tid=9445)
+- The PHILCO Phorum (https://philcoradio.com/phorum)
+-- Forum: Philco Radio Discussions (https://philcoradio.com/phorum/forumdisplay.php?fid=5)
+--- Forum: Philco Electronic Restoration (https://philcoradio.com/phorum/forumdisplay.php?fid=8)
+--- Thread: resistor wattage? (/showthread.php?tid=9445)
resistor wattage? - OldRestorer - 04-30-2014
I got a big load of resistors from someone but the issue is they were all jumbled together with no way to tell the wattage. took me 3 hours to separate them. Is there anything that tells you that a resistor is 1/2 watt or 1 watt etc?
thanks for any help
Kirk
RE: resistor wattage? - skyscraper - 04-30-2014
Are they old ones or new ones? Something like this could help: http://firetrucksandequipment.tpub.com/TM-9-254/img/TM-9-254_217_1.jpg
But it's hard to tell. Each wattage has consistently become physically smaller over the years. Do you have a photo?
RE: resistor wattage? - codefox1 - 04-30-2014
Elderly carbon resistors are prone to drift up in ohmage and otherwise may perform oddly whether or not they have ever been used. Can't say I know a good way to test other than an ohm-meter.
RE: resistor wattage? - tab10672 - 04-30-2014
As it was mentioned a photo would help because it depends on composition and/or age. When you take the picture include something known to compare size to, like a penny.
RE: resistor wattage? - Chuck Schwark - 05-01-2014
You haven't been searching my site. Comparison pics of resistors.
See this: http://philcorepairbench.com/resistcompare.htm
Chuck
RE: resistor wattage? - OldRestorer - 05-01-2014
Great Chuck,
I have been searching google but came up with nothing on wattage.
RE: resistor wattage? - morzh - 05-01-2014
http://www.mouser.com/ds/2/303/little_demon-180342.pdf
This is Ohmite datasheet showing similar resistors with sizes.
Might not be exact same but should give you an idea.
RE: resistor wattage? - tab10672 - 05-01-2014
The 2 larger ones of the 3 on the left are 1/2w. The rest appear to Be 1/4w
RE: resistor wattage? - morzh - 05-01-2014
There are new resistors like the one on the right looking like they are 1/4W that are in fact 1W resistors. Just recently used some.
They are of course not carbon type. First time I saw them I did not believe it.