Tube Amp Archive

Back on topic: great, this is the type of amp (ECC82 output) I wanted to make before I ordered parts for a 5F1 clone. :x 8) Thanks for the schem anyway, guys. Anyone have any info on the PT required? I only see the 125A OT, but no PT name. Oh wait, that must be what the "230V sec" is about. So using...

Max, you're welcome. If the ECL82 is easily enough attainable then by all means go ahead. (I forgot if it was the ECL82 or ECL86 on the schem) Still leaves the 12BZ7, but if you're not using this preamp then I guess you're in much safer territory. Although you will have to do some calcs yourself on ...

Hi Marco! You're right, the power shares evenly in series or in parallel as long as the values of both resistors are the same. You can figure out all the relations with different values or networks with a couple of equations: V = IR and P = IV. The voltage and current divider rules are helpful too,...

I haven't built one either, but I don't even recognize half the tubes in there! The 12BZ7 is completely unknown to me, maybe you can find the spec sheet at tdsl.duncanamps.com, but I don't know how ubiquitous they are. I'm not sure if they're in current manufacture. I know about the ECL86, it's a 12...

Any chance of a specific example? I can think of one -- the 1W series resistors in a plexi marshall power supply, but this is an obvious case of splitting the load as that's a relatively high wattage and high voltage location in the circuit. Otherwise, we'd have to see an example to hazard a guess....