Hi! I am making a mesa boggie mark II diy. I made almost parts and I already test of the pré amplifier. I made transformer of power.
So, I still missing the output transformer and inductors of EQ.
Does anyone have the specification of output transformer? I'll wind the transformer myself.
So, I still missing the output transformer and inductors of EQ.
Does anyone have the specification of output transformer? I'll wind the transformer myself.
Actually I got a little confused. To calculate I need the input voltage on the valve plates, right? And having the reflected impedance of the valve +- 4000k 6l6 and El34?
This is a 6L6 pair?
Refer to RCA datasheet.
Im not sure you really want 80/100 watt output section.
For a live band running full tilt usually you want the classic 40 watt pair.
EL34 are used for quicker breakup.
And even then it is massive loud.
Mesa Boogie rather notorious for using rather small spongy transformer that saturate easy.
So any after market transformer is a upgrade.
Refer to RCA datasheet.
Im not sure you really want 80/100 watt output section.
For a live band running full tilt usually you want the classic 40 watt pair.
EL34 are used for quicker breakup.
And even then it is massive loud.
Mesa Boogie rather notorious for using rather small spongy transformer that saturate easy.
So any after market transformer is a upgrade.
I used this site for calculate. Is It right? https://www.py2bbs.qsl.br/calc_transf_audio.php#gsc.tab=0
Through the voltage of the primary and secondary I can calculate the transformer. I used 4000R for impedancia of valvula to calculate. Is the voltage of 447v in the primary and 14v in the secondary correct? For 100w just multiply the current of the primary and secondary.
At a first glance calculation looks plausible to me.
More than 2000turns of thin magnetic wire on the primary
requiring good insulation - is a challenge anyway.
More than 2000turns of thin magnetic wire on the primary
requiring good insulation - is a challenge anyway.
The Simulclass OT is special, using different primary impedances for inner and outer pair.
To understand the principle you might want to read this article:
https://www.ampbooks.com/mobile/classic-circuits/extended-a/
The Mark II doesn't use Simulclass.
To understand the principle you might want to read this article:
https://www.ampbooks.com/mobile/classic-circuits/extended-a/
The Mark II doesn't use Simulclass.
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