Opinions on rocket PS filtering sought

[KellyBass]

I'm starting on a new cost-is-no-object rocket reverb project soon...for a client (my first w/verb). I was looking through my parts and I have an atom 100uf cap that I'm tempted to use in place of the standard 80uf. I wouldn't even consider this except for a great piece of luck I had recently. I bought a box of worthless tubes at an estate sale and, lo and behold, the one tube that was worth anything was a sparkling new Mullard GZ34. So, should I proceed with the robust rocket PS, or sell the mullard and put one of my kids through college?

[Mark]

I suspect you will kill that Mullard. I haven't had my Rocket going long enough to comment about reliability but there is always a fingers in ears moment when turning it on.

Possibly a better idea is O'Conner's idea of using a large choke and have that before the main supply, check out the Vox section.

[overtone]

This Rocket is going to someone else, right?
Your call, but to my mind that is not the best situation to step beyond the published ratings.

tony

[KellyBass]

Great advice, guys. Thanks. I'd really hate to kill that mullard. I recently built an asteroid that eats jj's like crazy. I'm nervous even using it in that amp. I'm currently running a copper cap.

I'm gonna see if I can find that O'connor article.

[Jackie Treehorn]

Are you talking about putting the choke before the plates? That would make it pretty stiff. I would go the opposite route and go 40 mf or lower.

[Clyde]

Just remember that the 60uf rating for the GZ34 is a full current (volume) rating.

[KellyBass]

I found the O'connor article...he suggests a mod for a Vox AC30 in which
he recommends placing a 100uF cap AND a choke prior to the output transformer power supply node.

Shortly thereafter in the same article, he suggests a further mod...switching to a SS power supply! I will stick with the 80uf and be happy...my next project is a 200 watt Sunn-ish bass amp. 1600uf of reservoir!and a string of uf4007's .

[Roe]

I found the O'connor article...he suggests a mod for a Vox AC30 in which
he recommends placing a 100uF cap AND a choke prior to the output transformer power supply node.

Shortly thereafter in the same article, he suggests a further mod...switching to a SS power supply! I will stick with the 80uf and be happy...my next project is a 200 watt Sunn-ish bass amp. 1600uf of reservoir!and a string of uf4007's .

I've experimented alot with my ac30, and ended up preferring uf4007s into -CIC/Pi filter with 32uf before choke and 32uf after choke (and 33uf at the screens)

http://ampgarage.com/forum/viewtopic.php?t=23052