I'm REAL new at this radio restoring and I would like to ask a some questions about capacitors. I have a Philco 42-380 that needs work and it has 2 electrolytic capacitors with values of 8 mfd at 475 volts and 18 mfd at 475 volts. What could I use that would work in their place. Haven't been able to find the exact values to use as replacements. The other question is there a chart that shows what values can be used for a specific value in old radios if you can't find the exact value to use as a replacement. Sorry to be so basic but I don't want to do any more damage to a set thats already pretty messed up. All help greatly appreciated. John

You can use a 10 for the 8, and a 22 for the 18 it's not that critical but the voltages are. Make sure your caps are rated 475 or higher, 600v will work great and make sure you watch the polarity. Hope this helps.
Wayne

: I'm REAL new at this radio restoring and I would like to ask a some questions about capacitors. I have a Philco 42-380 that needs work and it has 2 electrolytic capacitors with values of 8 mfd at 475 volts and 18 mfd at 475 volts. What could I use that would work in their place. Haven't been able to find the exact values to use as replacements. The other question is there a chart that shows what values can be used for a specific value in old radios if you can't find the exact value to use as a replacement. Sorry to be so basic but I don't want to do any more damage to a set thats already pretty messed up. All help greatly appreciated. John

What wayne said, except no need to use anything rated higher than 350v. Couldnt pull up a scheme, but the 41 tubes are rated at 250v max.. Your tx is likely @ 250.
The overrated ones you found may have been whatever was handy in a repair shop.

Eg 10mfd,350v etc.

600volt electros will have a hefty pricetag!

: You can use a 10 for the 8, and a 22 for the 18 it's not that critical but the voltages are. Make sure your caps are rated 475 or higher, 600v will work great and make sure you watch the polarity. Hope this helps.
: Wayne

: : I'm REAL new at this radio restoring and I would like to ask a some questions about capacitors. I have a Philco 42-380 that needs work and it has 2 electrolytic capacitors with values of 8 mfd at 475 volts and 18 mfd at 475 volts. What could I use that would work in their place. Haven't been able to find the exact values to use as replacements. The other question is there a chart that shows what values can be used for a specific value in old radios if you can't find the exact value to use as a replacement. Sorry to be so basic but I don't want to do any more damage to a set thats already pretty messed up. All help greatly appreciated. John

The voltage will be higher during warmup, before the output tubes draw current. You can put a meter on the input filter cap and see if it stays within reason. Probably 450V caps will handle the surge.