Mxxxxn 12000 series vs classictone 40-18026
Posted: Wed Dec 19, 2018 5:14 am
74 superlead 100, someone had changed out both transformers to some hammond ( i think they're hammond, oldish ones..maybe 20 yrs)...reason unknown.
This suited me as i got the thing cheap and i would have liked to lower the B+ anyway, the 74 and the 69 are pretty close otherwise, changed presence cap to .1, without lifting feedback resistor out of board i changed the value to 27k and left it on the 16 0hm tap.
Changed the four clustered Daly filter caps out cause the tops were bubbled up a bit. Used some old LCR on the first stage, and some new jj 32's on the second. The P.I and the preamp filters are still good.
The power xformer is the right one for the job..same size as original..460v on the plates.
Bright cap is stock 5000pf
The o/t sounded awful, too bright...went through my stockpile of old o/ts, lots of old vintage iron from projects, spare NOS etc..they all had too much headroom.
Then I jumper leaded in this 40-18026 classictone this bloke left here as he wanted to upgrade to whatever it was I can't remember, anyway, I hit paydirt with this one..lots of dirt. I was in love.
Today I substituted in this mxxxxn 12000 series to see how different it is, and it is different.
The Mxxxxn is a different beast, plenty of saturation/dirt but it sparkles, harmonics fly out of the thing..it's articulate in the mids and highs, I've never heard that before in a shitty old marshall.
The thing is though, the classictone has more lower mids..more balls...lower end grunt.
The classictone is a good transformer guys, very good.
If you're a lead player, I suggest go the Mxxxxn , if you like chugg, I suggest the 40-18026 classictone.
This suited me as i got the thing cheap and i would have liked to lower the B+ anyway, the 74 and the 69 are pretty close otherwise, changed presence cap to .1, without lifting feedback resistor out of board i changed the value to 27k and left it on the 16 0hm tap.
Changed the four clustered Daly filter caps out cause the tops were bubbled up a bit. Used some old LCR on the first stage, and some new jj 32's on the second. The P.I and the preamp filters are still good.
The power xformer is the right one for the job..same size as original..460v on the plates.
Bright cap is stock 5000pf
The o/t sounded awful, too bright...went through my stockpile of old o/ts, lots of old vintage iron from projects, spare NOS etc..they all had too much headroom.
Then I jumper leaded in this 40-18026 classictone this bloke left here as he wanted to upgrade to whatever it was I can't remember, anyway, I hit paydirt with this one..lots of dirt. I was in love.
Today I substituted in this mxxxxn 12000 series to see how different it is, and it is different.
The Mxxxxn is a different beast, plenty of saturation/dirt but it sparkles, harmonics fly out of the thing..it's articulate in the mids and highs, I've never heard that before in a shitty old marshall.
The thing is though, the classictone has more lower mids..more balls...lower end grunt.
The classictone is a good transformer guys, very good.
If you're a lead player, I suggest go the Mxxxxn , if you like chugg, I suggest the 40-18026 classictone.