S.I.R. 100W SuperLead Schematic pt. II

[CoffeeTones]

https://i.ibb.co/0hzgNnt/MK72.png
https://i.ibb.co/r6tfjqJ/mk71.png

[gluke]

That’s his handwritten notes? That is awesome!

[BRMSlash]

Thanks for sharing CoffeeTones. There's some good info in there.

[gluke]

So much gain, the amp is choking and sounding un-natural.

That's mostly me just using the same settings as the other spec with all the extra gain available. I didn't have time to play around much with the settings and Duke recommended keeping them quite a bit lower. I got a bit carried way that I got it working, ha ha ha....

[gluke]

So i think its getting a bit out of control but still sounds not too bad, if you want, change the second stage to 5k7 ,22u

PS, before you do the 5k7.22u change, you could parallel a 100k with the NFB resistor to tighten the amp up a bit.

Done! Will try to make some clips later if I get the house to myself.

[gluke]

Daily clipage....

WTTJ:
https://youtu.be/Uo9NZd3oHHc

WTTJ Solo1:
https://youtu.be/zrwMZ1HVh8s

[dukeamps]

Daily clipage....

WTTJ:
https://youtu.be/Uo9NZd3oHHc

WTTJ Solo1:
https://youtu.be/zrwMZ1HVh8s

Sounds good, what is the full spec?

[gluke]

Sounds good, what is the full spec?

You’r asking me? I’m trying to follow your directions here

Let’s see if I managed. It should be this now:

2k7/.68/.022/470k+500p/5n/220k on pot

5k6/.22/.022/470k+470p/470k

3k3/.47/.022

820

50k (2x100k) 4 Ohm .68

[gluke]

It is extremly sensitive to gain settings though. The clips are at 4 and 3,5 and the difference between 3 and 3,5 is very audible.

[dukeamps]

Sounds good, what is the full spec?

You’r asking me? I’m trying to follow your directions here

Let’s see if I managed. It should be this now:

2k7/.68/.022/470k+500p/5n/220k on pot

5k6/.22/.022/470k+470p/470k

3k3/.47/.022

820

50k (2x100k) 4 Ohm .68

I was asking because you were changing things up a bit, and i had sort of lost track, yep you have a lot of gain on tap now. What do you think of this spec compared to the best spec ?

[dukeamps]

It is extremly sensitive to gain settings though. The clips are at 4 and 3,5 and the difference between 3 and 3,5 is very audible.

you could also put a 220k on the other gain pot to make it a bit more usable.

[gluke]

I was asking because you were changing things up a bit, and i had sort of lost track, yep you have a lot of gain on tap now. What do you think of this spec compared to the best spec ?

It just took me a while to get the shielded cables right. The first I was using kept shorting out on me.

It’s kinda weird, in some ways that other spec overall sounds «better» and fuller and is much more forgiving, but if you get this one dialed in just right then there is something happening on the intro to WTTJ and SCOM that is more «right» to my ears. It has that combo of chunk and stringyness that I have been chasing.

[dukeamps]

I was asking because you were changing things up a bit, and i had sort of lost track, yep you have a lot of gain on tap now. What do you think of this spec compared to the best spec ?

It just took me a while to get the shielded cables right. The first I was using kept shorting out on me.

It’s kinda weird, in some ways that other spec overall sounds «better» and fuller and is much more forgiving, but if you get this one dialed in just right then there is something happening on the intro to WTTJ and SCOM that is more «right» to my ears. It has that combo of chunk and stringyness that I have been chasing.

[snakepit86]

https://i.ibb.co/0hzgNnt/MK72.png
https://i.ibb.co/r6tfjqJ/mk71.png

Hold on a minute.... where did you get this? this is awesome hehe

[reychapa]

https://i.ibb.co/0hzgNnt/MK72.png
https://i.ibb.co/r6tfjqJ/mk71.png

Can u see how this values is similar a silver jubilee circuit?

It was close Marshall?, also taking Jose into account with clipping diodes options


PD: Thanks CafeeTones!!