I agree RP, and compared to the many other GZ34-equipped amps I've owned, I definitely would not describe this Rocket with the Mullard rectifier as being "saggy" at all.
FWIW, my buddy also chewed up a JJ GZ34 quickly with his Rocket, and put in a Sovtek...it's been holding up great, and he's kinda rough with the standby switching...the NOS Mullards are soooo expensive now.
Good Luck RP,
TurboJunkie
The First 80uF Cap In A Rocket
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Turbojunkie
- Posts: 151
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Re: The First 80uF Cap In A Rocket
First 25 years of playing, I never got along with EL84's...Now I think, WHAT THE HELL WAS WRONG WITH ME????
Re: The First 80uF Cap In A Rocket
Have a look at Kevin O'Connor's book, he had some mods for an AC-30.
He recommended a 100uF cap and a choke prior to the output transformer power supply node.
EDIT: I forgot to mention KOC recommends getting rid of the tube rectifier. As stated below 100uF would blow the brains out of a GZ34 in time.
He recommended a 100uF cap and a choke prior to the output transformer power supply node.
EDIT: I forgot to mention KOC recommends getting rid of the tube rectifier. As stated below 100uF would blow the brains out of a GZ34 in time.
Last edited by Mark on Wed Oct 16, 2013 12:30 am, edited 1 time in total.
Yours Sincerely
Mark Abbott
Mark Abbott
Re: The First 80uF Cap In A Rocket
The uf rating limit on rectifier tubes is a full power rating. If you're running the amp wide open all the time, then the 60uf limit should be observed. I don't think most of us run the amp full bore continuously.
Unfortunately the new production GZ34's just don't stack up. I get many failures no matter which type I use. NOS Mullard will be a once in a lifetime purchase.
Unfortunately the new production GZ34's just don't stack up. I get many failures no matter which type I use. NOS Mullard will be a once in a lifetime purchase.