Page 771 of 775
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Thu Dec 07, 2023 2:31 pm
by sonoman1979
CoffeeTones wrote: ↑Sat Dec 02, 2023 2:15 pm
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!
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Thu Dec 07, 2023 7:38 pm
by 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.
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Thu Dec 07, 2023 9:43 pm
by sonoman1979
CoffeeTones wrote: ↑Thu Dec 07, 2023 7:38 pm
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!
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Fri Dec 08, 2023 5:23 pm
by snakepit86
Hey sonoman! this sounds fking awesome!!!
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Fri Dec 08, 2023 6:58 pm
by sonoman1979
snakepit86 wrote: ↑Fri Dec 08, 2023 5:23 pm
Hey sonoman! this sounds fking awesome!!!
Thanks Snakeit, I hope to improve it soon. Yours sounds great!
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Sat Dec 09, 2023 1:27 pm
by 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
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Fri Dec 15, 2023 5:41 pm
by sonoman1979
Sounds really good Snakepit
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Fri Dec 15, 2023 5:44 pm
by sonoman1979
sonoman1979 wrote: ↑Thu Dec 07, 2023 9:43 pm
CoffeeTones wrote: ↑Thu Dec 07, 2023 7:38 pm
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!
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Sun Dec 17, 2023 10:46 am
by dukeamps
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Sun Dec 17, 2023 8:26 pm
by sonoman1979
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Sun Dec 17, 2023 8:42 pm
by 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.
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Sun Dec 17, 2023 9:07 pm
by sonoman1979
CoffeeTones wrote: ↑Sun Dec 17, 2023 8:42 pm
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
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Mon Dec 18, 2023 5:13 am
by dukeamps
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Mon Dec 18, 2023 2:11 pm
by 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
Re: S.I.R. 100W SuperLead Schematic pt. II
Posted: Mon Dec 18, 2023 3:53 pm
by 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.
