07-26-2009, 11:57 AM
I'd always go with the 630 VDC caps, they are only a couple of pennies more, and certainly size is not a problem. Solder once, listen many times. Expect all voltages to be a little larger with today's line voltage. And if you replace filter caps with a little larger size, you will get a few more volts too. So sometimes you have to tame the B+ a little to provide long term reliability. Those tubes aren't getting any younger. N.B. - also applies to series string sets, and double careful on "portables" with their delicate filaments.
You don't want to starve the filaments though, because that can create problems of it's own, like getters not getting hot enough to do their job of cleaning up the rarified atmosphere. It's certainly is a juggling act, isn't it?
You don't want to starve the filaments though, because that can create problems of it's own, like getters not getting hot enough to do their job of cleaning up the rarified atmosphere. It's certainly is a juggling act, isn't it?
