trinityamps.com

Hey folks,

I'm doing an audit on the bag of lightning parts I ordered a few months back...and I've hit a few questions...

Turns out I've got a 1200pF coupling cap instead of the schematic listed .0015uf....not a big difference. Has the schematic changed or an I just going senile?

Secondly, turns out I have a 220uf / 63v cathode cap...instead of the listed 250uf one? again...did things change or am I just losing it?

Finally....having said all of the above, do any of you envision problems if I use the parts on hand.....or should I place an order for the correct parts...

-Frank

The values you have should be fine. The cathode cap is +/- 20% so the values might as well be the same. I think Stephen did recently change the schematic from .0012uF to .0015uF, but they are so close I doubt human ears can tell the difference.

_________________
--s2
www.s2amps.com
www.category5amps.com

Thanks Steve....obviously, both things I can change down the road if I want to bring it in line with the schematic....although, for the life of me, I can't seem to find a 250uf/63v cap at mouser.....all the usual offerings seem to be 220uf....

I was just curious on the off chance that running a 220uf in the cathode cap would be a problem for the el84s...

-F

Not at all. It will have more to do with frequency response than anything else. A 220uF will give you very slightly less bass response than a 250uF, but we are talking about frequencies below the range of human hearing. BTW, you can find 250uF in 100V caps. You can always go up in voltage--just not down.

_________________
--s2
www.s2amps.com
www.category5amps.com

It's true, I did change the coupling cap value. Either would work fine as Steven said, ditto on the bypass cap.
You are not loosing it!

_________________
Stephen
Web: www.trinityamps.com. Facebook: facebook.com/trinityamps. Twitter: @trinityamps

If you wanted to get industrious, you could also change the electrolytics to 20 and 30uf, since that's the only blue Sprague Atom caps that get close.

That plus/minus 20% is almost a joke when you get right down to it.

I like the ones that Nik at Ceri@tone has relabeled. They go up to 105 degrees C whereas most caps you usually see in amps only go up to 85.