Help with Ampeg R12R voltages

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azatplayer
Posts: 556
Joined: Thu Feb 26, 2009 7:59 pm
Location: Great Southland

Help with Ampeg R12R voltages

Post by azatplayer »

Hey all. I built a B15N recently as i had need of a bass amp in our band, and was looking for a project to use up an old builds parts on.
Straight up this is a really cool amp, sounded amazing. Its the fixed bias version, and had so much cool character going on. I built it one channel, so had some tweaking voltage wise to get it where i think is right. Love it.
My brother who plays baritone in our trio, was the target for it, and he really digs it. But we picked up a superbass JCM recently and its pretty wicked too thru a 1x15 EV.
So i got to tweaking the tonestack to suit guitar more, it sounds great with guitar btw, but i wanted to try and get the bottom out of it more.
I have just about got things real good, in fact really nice. And have stolen a few bits from the reverborocket.
So question is can anyone help me with voltages for the reverbarocket?
Google gave me one set on a supposedly sick amp, what im particularly chasing is B+ feeding the PI and V1's plates.
Theres trem and reverb of course, so theres like 5 drops, but the hand drawn schem appears to call B+3 feeding both the PI and the input stage.
From the other post a saw, its about 270V DC to the PI stage.

Appreciate any help, cheers Don
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Structo
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Location: Oregon

Re: Help with Ampeg R12R voltages

Post by Structo »

This schematic doesn't show voltages but it is a clean copy.

http://www.schematicheaven.com/ampegamp ... taflex.pdf
Tom

Don't let that smoke out!
azatplayer
Posts: 556
Joined: Thu Feb 26, 2009 7:59 pm
Location: Great Southland

Re: Help with Ampeg R12R voltages

Post by azatplayer »

Sorry Tom, my mistake, i meant the R12R schemo.
Thanks man.
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Structo
Posts: 15446
Joined: Wed Oct 17, 2007 1:01 am
Location: Oregon

Re: Help with Ampeg R12R voltages

Post by Structo »

So it id the Reverb Rocket 12-R? Not the reissue right?

http://www.schematicheaven.com/ampegamp ... et_12r.pdf
Tom

Don't let that smoke out!
azatplayer
Posts: 556
Joined: Thu Feb 26, 2009 7:59 pm
Location: Great Southland

Re: Help with Ampeg R12R voltages

Post by azatplayer »

Perfect! Thanks man!
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