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

[sonoman1979]

Increase NFB or add 150k ground to wiper on gain 1. No idea what you have currently.

Hi Duane, I tried to increase NFB, this is around 82K (8ohm), 470p presence

https://www.dropbox.com/scl/fi/5zy3zr7w ... vcx7u&dl=0

Then I tried 150k on gain potentiometer, same NFB parameters, both recordings with Master on 2 and gain on 6 with attenuator.

https://www.dropbox.com/scl/fi/swbx13l6 ... 6avs3&dl=0

Maybe I need to work a little bit on amp EQ or use different resistor on gain. What do you think?

Thank you!

[CoffeeTones]

Try 100k 8r NFB then the equivalent of 100k 4r if you want more bottom.
.1u presence
Leave the 150k
Turn gain 1 to around 6
Presence on 5
Master to taste - probably 1 to 3
All other controls around 6 - the EQ should be pretty sensitive, so make small EQ changes.

PM your specs. I don't recall the specifics.

[sonoman1979]

Try 100k 8r NFB then the equivalent of 100k 4r if you want more bottom.
.1u presence
Leave the 150k
Turn gain 1 to around 6
Presence on 5
Master to taste - probably 1 to 3
All other controls around 6 - the EQ should be pretty sensitive, so make small EQ changes.

PM your specs. I don't recall the specifics.

PM sent. Thank you Duane!

[snakepit86]

Increase NFB or add 150k ground to wiper on gain 1. No idea what you have currently.

Hi Duane, I tried to increase NFB, this is around 82K (8ohm), 470p presence

https://www.dropbox.com/scl/fi/5zy3zr7w ... vcx7u&dl=0

Then I tried 150k on gain potentiometer, same NFB parameters, both recordings with Master on 2 and gain on 6 with attenuator.

https://www.dropbox.com/scl/fi/swbx13l6 ... 6avs3&dl=0

Maybe I need to work a little bit on amp EQ or use different resistor on gain. What do you think?

Thank you!

Hey sonoman! this sounds fking awesome!!!

[sonoman1979]

Increase NFB or add 150k ground to wiper on gain 1. No idea what you have currently.

Hi Duane, I tried to increase NFB, this is around 82K (8ohm), 470p presence

https://www.dropbox.com/scl/fi/5zy3zr7w ... vcx7u&dl=0

Then I tried 150k on gain potentiometer, same NFB parameters, both recordings with Master on 2 and gain on 6 with attenuator.

https://www.dropbox.com/scl/fi/swbx13l6 ... 6avs3&dl=0

Maybe I need to work a little bit on amp EQ or use different resistor on gain. What do you think?

Thank you!

Hey sonoman! this sounds fking awesome!!!

Thanks Snakeit, I hope to improve it soon. Yours sounds great!

[snakepit86]

https://www.youtube.com/watch?v=rlO468foIYo

Hi everybody, my last build
This sounds amazing and its only 20w

The #36 its so cool, you can get any slash sounds, iven the Jubilee live tone

[sonoman1979]

https://www.youtube.com/watch?v=rlO468foIYo

Hi everybody, my last build
This sounds amazing and its only 20w

The #36 its so cool, you can get any slash sounds, iven the Jubilee live tone

Sounds really good Snakepit

[sonoman1979]

Try 100k 8r NFB then the equivalent of 100k 4r if you want more bottom.
.1u presence
Leave the 150k
Turn gain 1 to around 6
Presence on 5
Master to taste - probably 1 to 3
All other controls around 6 - the EQ should be pretty sensitive, so make small EQ changes.

PM your specs. I don't recall the specifics.

PM sent. Thank you Duane!

Hi Duane, I did what you said and I think now is more fun to play. This was a quick recording, first part with 150k//330k on NFB and second part (2:51) with 150k//470k. I think I still have to set gain and EQ better, this was GBM on 6 T4 P5 M2.5. I think I should set gain or bass lower.

https://www.dropbox.com/scl/fi/mk9utg49 ... oxq5t&dl=0

Thank you very much!

[dukeamps]

https://youtu.be/br74HvqlZbE?si=x1CcpdCoBQBeF0ik
36 mod Kemper profile afd mix.

[sonoman1979]

This one has a little more NFB

https://www.dropbox.com/scl/fi/schna38h ... fa56x&dl=0

[CoffeeTones]

Might be the recording but sounds like the gain needs to back off a bit. Maybe go back to 270k or bump the control down. If you have 150k parallel with 100k on 8r tap, that is too much feedback IMO. 270k // 150k would be my limit.

[sonoman1979]

Might be the recording but sounds like the gain needs to back off a bit. Maybe go back to 270k or bump the control down. If you have 150k parallel with 100k on 8r tap, that is too much feedback IMO. 270k // 150k would be my limit.

Thank you very much for your help Duane, now I have a potentiometer in parallel with the 150k resistor. I have not measured the value but based on the position I estimate that it will be approximately 280k in parallel with 150k. I think I should try lowering the gain a little too

[dukeamps]

DA 76 JMP100w 36 Mod Kemper profile, NT
https://soundclick.com/share.cfm?id=14700434

[sonoman1979]

This is with less gain, I think I should back off the gain some more.

https://www.dropbox.com/scl/fi/cphvgsp9 ... 7c2ek&dl=0

[CoffeeTones]

Now work on either a lil less feedback, the peaker, prior to gain 1 or decrease tail. It needs more bottom. Has a lil too much highs.