Hello Findeton,
I quote; "I have a jtm45 hand-made by myself, but i'd love to have a pedal that is able to get the classic tube distortion without having to mod my amplifier nor having to pump up the volume. There are many stompboxes out there, even some with tubes in them, but I like to do things by myself."
So I'll take it That this is the AIM of Your exercise?
Take the classic Bassman/ Marshall swap as an example;
Without changing anything (other that a rebias) change the 6L6/5881 to a EL34.
This turns a mildly hot bassman into a monster compressed OD machine.
"""""Pentodes where invented to overcome the limitations of triodes."""
Triode output stage has a distinct rounded top when driven hard only Tetodes and better still Pentodes can do the marshall *Square Wave* compression trick.
The sound you hear from you JTM is **Output compression** and has very little to do with triodes. (though the PI may hold some secrets).
Triodes can't do it With the aid of a transformer so what hope is there with only a triode?? :duh
Go the whole hog,, swap your JTM45 to 6V6 output and you will be lucky if it rattles on 10 as they have very low TC.
Or just triode strap you output tubes in the JTM45 to make them work like triodes? I doubt you will like the thinner weaker sound.
Tube power stages are just big oversized, overweight, expensive *Compressors* 8|
Darn problem is that by the time they compress well they are to darn loud,
as you have noted.
Another clue can be found in some of the *early studio compressors* (names escape me here but) some of them actually used *phase splitters* and *Transformers*. (hint)
Though they worked well for audio they still could not pull off the same trickery as guitar amp outputs. (maybe because they only used triodes)
You obviously have the mind for vastly complex stuff (You leave me for dead) but I fear your base data is way off.
As I've come to understand with most things scientific,,,If you miss the basic concept all the maths in the world won't make it right.
Have fun, Phil.
I quote; "I have a jtm45 hand-made by myself, but i'd love to have a pedal that is able to get the classic tube distortion without having to mod my amplifier nor having to pump up the volume. There are many stompboxes out there, even some with tubes in them, but I like to do things by myself."
So I'll take it That this is the AIM of Your exercise?
Take the classic Bassman/ Marshall swap as an example;
Without changing anything (other that a rebias) change the 6L6/5881 to a EL34.
This turns a mildly hot bassman into a monster compressed OD machine.
"""""Pentodes where invented to overcome the limitations of triodes."""
Triode output stage has a distinct rounded top when driven hard only Tetodes and better still Pentodes can do the marshall *Square Wave* compression trick.
The sound you hear from you JTM is **Output compression** and has very little to do with triodes. (though the PI may hold some secrets).
Triodes can't do it With the aid of a transformer so what hope is there with only a triode?? :duh
Go the whole hog,, swap your JTM45 to 6V6 output and you will be lucky if it rattles on 10 as they have very low TC.
Or just triode strap you output tubes in the JTM45 to make them work like triodes? I doubt you will like the thinner weaker sound.
Tube power stages are just big oversized, overweight, expensive *Compressors* 8|
Darn problem is that by the time they compress well they are to darn loud,
as you have noted.
Another clue can be found in some of the *early studio compressors* (names escape me here but) some of them actually used *phase splitters* and *Transformers*. (hint)
Though they worked well for audio they still could not pull off the same trickery as guitar amp outputs. (maybe because they only used triodes)
You obviously have the mind for vastly complex stuff (You leave me for dead) but I fear your base data is way off.
As I've come to understand with most things scientific,,,If you miss the basic concept all the maths in the world won't make it right.
Have fun, Phil.