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

[gluke]

No idea what you have now, but sounds like maybe a 250p treble cap and / or peaker combo addition.

This is Duke’s suggested spec but with a 1n bright cap.

[CoffeeTones]

[CoffeeTones]

In that case, try 220k // 1n instead of 470k // 470p pre pot, or maybe 3k3 instead of 2k7 cathode resistor on one of the stages. If you have a 2n2 CC, maybe bump that up.

[gluke]

In that case, try 220k // 1n instead of 470k // 470p pre pot, or maybe 3k3 instead of 2k7 cathode resistor on one of the stages. If you have a 2n2 CC, maybe bump that up.

Will try some tomorrow. All CCs are .022.

[gluke]

In that case, try 220k // 1n instead of 470k // 470p pre pot,

I think I'v tried every combination know to man by now...... nothing seems to stick. Duke's spec sounds really good and there's a few others that sound ok but I'm not quite getting the right clonk for SCOM. Maybe my ears are føkked by now.....

[dukeamps]

I think I'v tried every combination know to man by now...... nothing seems to stick. Duke's spec sounds really good and there's a few others that sound ok but I'm not quite getting the right clonk for SCOM. Maybe my ears are still føkked....
[/quote]

I always thought 250p33k TS sounded great for scom, but that was with a 5n bright.

[gluke]

I always thought 250p33k TS sounded great for scom, but that was with a 5n bright.

I keep going back to the 5n... it has that nice full sound and grit. It’s been in and out 3 times today...... 250p, 500p, 1n, 2n2 and the 5n. In any combination with the 470k and over the 470k or 220k...... I fear the pots are gonna cave in soon because of all the soldering....

Oh well, I’ll have to lift the board again then..... hope I don’t break anything.

[dukeamps]

I always thought 250p33k TS sounded great for scom, but that was with a 5n bright.

I keep going back to the 5n... it has that nice full sound and grit. It’s been in and out 3 times today...... 250p, 500p, 1n, 2n2 and the 5n. In any combination with the 470k and over the 470k or 220k...... I fear the pots are gonna cave in soon because of all the soldering....

Oh well, I’ll have to lift the board again then..... hope I don’t break anything.

You dont have to lift the board, just take the wire out from the treble pot tape it off, and run a new wire with a 250p on one side, just tack it to the far side of the 500p at the TS should work ok for a test.

[CoffeeTones]

I always thought 250p33k TS sounded great for scom, but that was with a 5n bright.

I keep going back to the 5n... it has that nice full sound and grit. It’s been in and out 3 times today...... 250p, 500p, 1n, 2n2 and the 5n. In any combination with the 470k and over the 470k or 220k...... I fear the pots are gonna cave in soon because of all the soldering....

Oh well, I’ll have to lift the board again then..... hope I don’t break anything.

3n3 bright works well in these specs too. All said and done, it's what makes you happy with the amp. It has to feel right and sound good too. There's a point where the amp is easier to play and you can hardly miss a note on the guitar because of it. That is when you have it just right.

No doubt your ears are tired. A few days rest and you will hear things totally different. That is where we can help by listening to the clips. What I heard missing in the last clips was the raunchy edge and thickness in the bottom end mostly. If the 5n does the trick for you, so be it. Since you have the amp so close to the tone, I'd tweak mostly with a combination of a few places - the pre gain peaker combo, bright cap, 2k7 to 3k3 // .68 cathode, and maybe the presence circuit. A presence circuit change would probably be too drastic with your current spec though.

[gluke]

You dont have to lift the board, just take the wire out from the treble pot tape it off, and run a new wire with a 250p on one side, just tack it to the far side of the 500p at the TS should work ok for a test.

Now, that’s like, really really clever and alot quicker! Thank you!

[CoffeeTones]

I always thought 250p33k TS sounded great for scom, but that was with a 5n bright.

I keep going back to the 5n... it has that nice full sound and grit. It’s been in and out 3 times today...... 250p, 500p, 1n, 2n2 and the 5n. In any combination with the 470k and over the 470k or 220k...... I fear the pots are gonna cave in soon because of all the soldering....

Oh well, I’ll have to lift the board again then..... hope I don’t break anything.

You dont have to lift the board, just take the wire out from the treble pot tape it off, and run a new wire with a 250p on one side, just tack it to the far side of the 500p at the TS should work ok for a test.

Also you can disconnect from the treble pot, or cut the wire to splice another ~500pF in series to the original 470pF to 500pF and get 250pF. That way you never solder to the board or pot if you choose to splice the wire.

[gluke]

No doubt your ears are tired. A few days rest and you will hear things totally different. That is where we can help by listening to the clips.

I did some clips this morning that I was going to post, but then I went on a complete modding spree and now I can’t remember what the spec in the clips is anymore.......

[dukeamps]

You dont have to lift the board, just take the wire out from the treble pot tape it off, and run a new wire with a 250p on one side, just tack it to the far side of the 500p at the TS should work ok for a test.

Now, that’s like, really really clever and alot quicker! Thank you!

[gluke]

So here's the 250p treble cap:

WTTJ Solo 1:
https://www.youtube.com/watch?v=gymhEzvgwks

WTTJ Solo 2:
https://www.youtube.com/watch?v=18vXq-TjEJg

And here is the long forgotten spec from this morning:

WTTJ Solo 1:
https://www.youtube.com/watch?v=t2T6oSSrYQg

WTTJ Solo 2:
https://www.youtube.com/watch?v=-8HDrE3RZoA

[dukeamps]

So here's the 250p treble cap:

WTTJ Solo 1:
https://www.youtube.com/watch?v=gymhEzvgwks

WTTJ Solo 2:
https://www.youtube.com/watch?v=18vXq-TjEJg

And here is the long forgotten spec from this morning:

WTTJ Solo 1:
https://www.youtube.com/watch?v=t2T6oSSrYQg

WTTJ Solo 2:
https://www.youtube.com/watch?v=-8HDrE3RZoA

I think the 250p clips sound good, but are a little too loose on the bass strings, the other clips sound good too, and have more bite. What do you think yourself ? If you could do a clip of scom with the 250p.