Hey Folks -
Doing a little digging. Tried to read up on the META:
Capacitors and choosing them (Walt Jung?s famous article):
http://www.capacitors.com/picking_capacitors/pickcap.htm
Link doesn't seem to work anymore.
Replacing caps in a 70's Traynor YBA-1. No choke.
Wondering if some JJ 50/50 µF - 500V are a good replacement for the 40/40 µF 450V.
I understand that the voltage rating is fine. I'm not sure about the tolerance of the caps that were in there, they are, I believe, the original Mallory's.
I figured that they would be a fine replacement but then came across this on the Electrical Audio messageboard:
Postby steve on Sun Oct 21, 2007 3:37 pm
Additional note: The choke in the PSU means you can use higher filter cap values than stock, which will lower the ripple even more (which you should do if you increase the gain of the first preamp section as Scott suggests).
You can't arbitrarily increase the size of caps in amps without a choke because the rectifier will blow if the first cap it sees is too large, but with a choke in there you can double the size of the filter caps with impunity.
For reference, the MKII we have here has JJEL34 power tubes, if you're interested in re-making that amp.
Congratulations on the amp score. Those things are the business.
steve albini
Electrical Audio
Thanks for any help you can offer.
Gus.
Doing a little digging. Tried to read up on the META:
Capacitors and choosing them (Walt Jung?s famous article):
http://www.capacitors.com/picking_capacitors/pickcap.htm
Link doesn't seem to work anymore.
Replacing caps in a 70's Traynor YBA-1. No choke.
Wondering if some JJ 50/50 µF - 500V are a good replacement for the 40/40 µF 450V.
I understand that the voltage rating is fine. I'm not sure about the tolerance of the caps that were in there, they are, I believe, the original Mallory's.
I figured that they would be a fine replacement but then came across this on the Electrical Audio messageboard:
Postby steve on Sun Oct 21, 2007 3:37 pm
Additional note: The choke in the PSU means you can use higher filter cap values than stock, which will lower the ripple even more (which you should do if you increase the gain of the first preamp section as Scott suggests).
You can't arbitrarily increase the size of caps in amps without a choke because the rectifier will blow if the first cap it sees is too large, but with a choke in there you can double the size of the filter caps with impunity.
For reference, the MKII we have here has JJEL34 power tubes, if you're interested in re-making that amp.
Congratulations on the amp score. Those things are the business.
steve albini
Electrical Audio
Thanks for any help you can offer.
Gus.