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

Everything from original vintage Marshalls to reissues.

Moderator: VelvetGeorge

Post Reply
bennyx
Senior Member
Posts: 783
Joined: Wed Mar 24, 2010 7:20 am
Just the numbers in order: 7
Location: Italy
Contact:

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

Post by bennyx » Wed Nov 18, 2015 3:18 pm

pjoliver182 wrote:I can see why it was too bright yes. To make it less bright you'd just remove/reduce bright caps and treble peakers...
Or remove bright cap and increase treble peaker....like Frank style

BRMSlash
Senior Member
Posts: 480
Joined: Sun Jul 18, 2010 9:00 pm
Just the numbers in order: 13492
Location: Australia

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

Post by BRMSlash » Wed Nov 18, 2015 3:52 pm

pjoliver182 wrote:You have grid stoppers on every stage? How come?
I'm trying to keep the highs tighter and not as loose. But listening again with a nights rest, I notice that I had the gain a touch too low and also the grid stoppers are dulling the tone a bit too much. Maybe I'll take them off again or lower them. Maybe I'll try partial cathode bypasses on the 1st and 4th instead.

pjoliver182
Senior Member
Posts: 271
Joined: Mon Jan 16, 2012 12:00 pm
Just the numbers in order: 7
Location: UK

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

Post by pjoliver182 » Wed Nov 18, 2015 4:26 pm

Sounds great Nigel. You must be using Benny's spec?

:shred:

bennyx
Senior Member
Posts: 783
Joined: Wed Mar 24, 2010 7:20 am
Just the numbers in order: 7
Location: Italy
Contact:

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

Post by bennyx » Thu Nov 19, 2015 1:10 am

Frank private message: Sorry I was not thinking clearly... It has a 10k on the cathode of v3
My apologies
so.....

pjoliver182
Senior Member
Posts: 271
Joined: Mon Jan 16, 2012 12:00 pm
Just the numbers in order: 7
Location: UK

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

Post by pjoliver182 » Thu Nov 19, 2015 1:58 am

Now it's a public message :lol:

bennyx
Senior Member
Posts: 783
Joined: Wed Mar 24, 2010 7:20 am
Just the numbers in order: 7
Location: Italy
Contact:

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

Post by bennyx » Thu Nov 19, 2015 2:32 am

If added stage are the first stage "the big cap" that Glenn have says is 680n.......2k7/680n....it's so easy

dukeamps
Senior Member
Posts: 1366
Joined: Mon Mar 22, 2010 10:08 am
Just the numbers in order: 7
Location: Germany
Contact:

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

Post by dukeamps » Thu Nov 19, 2015 3:28 am

bennyx wrote:If added stage are the first stage "the big cap" that Glenn have says is 680n.......2k7/680n....it's so easy
yes, but he also said that all the cathodes were bypassed, & the big cap could also have been a big 220u cap, Levi seems to tell everyone something different, so you can't really go with him.

I have found that all the amps i have modded all sounded different, so the same mod didn't work for all, they all needed different tweaks, what works in your amp Benny will probably not work for someone else's amp.


:toast:

dukeamps
Senior Member
Posts: 1366
Joined: Mon Mar 22, 2010 10:08 am
Just the numbers in order: 7
Location: Germany
Contact:

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

Post by dukeamps » Thu Nov 19, 2015 3:31 am

pjoliver182 wrote:
Sounds great Nigel. You must be using Benny's spec?

:shred:
Cheers Paul, well haha, different spec, different tubes, & different speaker,

:toast:

bennyx
Senior Member
Posts: 783
Joined: Wed Mar 24, 2010 7:20 am
Just the numbers in order: 7
Location: Italy
Contact:

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

Post by bennyx » Thu Nov 19, 2015 3:52 am

dukeamps wrote:
bennyx wrote:If added stage are the first stage "the big cap" that Glenn have says is 680n.......2k7/680n....it's so easy
yes, but he also said that all the cathodes were bypassed, & the big cap could also have been a big 220u cap, Levi seems to tell everyone something different, so you can't really go with him.

I have found that all the amps i have modded all sounded different, so the same mod didn't work for all, they all needed different tweaks, what works in your amp Benny will probably not work for someone else's amp.


:toast:
Perhaps Glenn don't remind good.....he confound Caswell 39 with Levi superkill specs....that as you say is true...all amps sound different.....but not more different....if scheme and tubes are the same the amps sound pretty similar.....componets type are 2-3% of sound....

pjoliver182
Senior Member
Posts: 271
Joined: Mon Jan 16, 2012 12:00 pm
Just the numbers in order: 7
Location: UK

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

Post by pjoliver182 » Thu Nov 19, 2015 4:44 am

Or maybe Glenn remembers very well and Frank is mistaken...he just told you his memory failed him. In the smom articles Glenn sas he remembers clearly what they did.

All depends on what you *want* to believe...

...or what you *know* sounds the most authentic because you've tried all approaches!

dukeamps
Senior Member
Posts: 1366
Joined: Mon Mar 22, 2010 10:08 am
Just the numbers in order: 7
Location: Germany
Contact:

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

Post by dukeamps » Thu Nov 19, 2015 6:27 am

bennyx wrote:
dukeamps wrote:
bennyx wrote:If added stage are the first stage "the big cap" that Glenn have says is 680n.......2k7/680n....it's so easy
yes, but he also said that all the cathodes were bypassed, & the big cap could also have been a big 220u cap, Levi seems to tell everyone something different, so you can't really go with him.

I have found that all the amps i have modded all sounded different, so the same mod didn't work for all, they all needed different tweaks, what works in your amp Benny will probably not work for someone else's amp.


:toast:
Perhaps Glenn don't remind good.....he confound Caswell 39 with Levi superkill specs....that as you say is true...all amps sound different.....but not more different....if scheme and tubes are the same the amps sound pretty similar.....componets type are 2-3% of sound....

2-3% is wrong Benny, take a typical Mullard cap from the 70s, it has a tolerance of +/- 10%, same with resistors & filter caps, so two amps built on the same day can have up to a max of 20% difference, then Marshall used different OT & PT on all of their amps, so there is another big difference, & that is not even considering aging.

If i can remember you are using JCM 800 amp from the 80s, that amp will not sound the same as one from the 70s, if you really want to find the true 36 tone buy a JMP 100w from 1977 & start from there. I have already modded one for someone, & i can tell you they are very loud amps, & i have also modded a JCM 800w 2203 form the 80s, i think it was from 83, & it sounded different.

:toast:

pjoliver182
Senior Member
Posts: 271
Joined: Mon Jan 16, 2012 12:00 pm
Just the numbers in order: 7
Location: UK

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

Post by pjoliver182 » Thu Nov 19, 2015 6:49 am

I thought Benny had a 1977 1959 mkii?

bennyx
Senior Member
Posts: 783
Joined: Wed Mar 24, 2010 7:20 am
Just the numbers in order: 7
Location: Italy
Contact:

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

Post by bennyx » Thu Nov 19, 2015 6:53 am


If i can remember you are using JCM 800 amp from the 80s, that amp will not sound the same as one from the 70s, if you really want to find the true 36 tone buy a JMP 100w from 1977 & start from there. I have already modded one for someone, & i can tell you they are very loud amps, & i have also modded a JCM 800w 2203 form the 80s, i think it was from 83, & it sounded different.

:toast:
You remember badly....i have a 1959 jmp of 1977.....1 month of difference of original 36 jmp......Glenn remember value of components and don't remember that 39 was re-mod by Frank.....seem to me ridicolous....

dukeamps
Senior Member
Posts: 1366
Joined: Mon Mar 22, 2010 10:08 am
Just the numbers in order: 7
Location: Germany
Contact:

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

Post by dukeamps » Thu Nov 19, 2015 7:05 am

bennyx wrote:

If i can remember you are using JCM 800 amp from the 80s, that amp will not sound the same as one from the 70s, if you really want to find the true 36 tone buy a JMP 100w from 1977 & start from there. I have already modded one for someone, & i can tell you they are very loud amps, & i have also modded a JCM 800w 2203 form the 80s, i think it was from 83, & it sounded different.

:toast:
You remember badly....i have a 1959 jmp of 1977.....1 month of difference of original 36 jmp......Glenn remember value of components and don't remember that 39 was re-mod by Frank.....seem to me ridicolous....
Oh ok if you say so, you tell so many different story's it hard to keep up with you.

Well either Glenn or you are not telling the truth, I would tend to believe the guy who was actually there doing the mod with Levi.

:toast:

bennyx
Senior Member
Posts: 783
Joined: Wed Mar 24, 2010 7:20 am
Just the numbers in order: 7
Location: Italy
Contact:

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

Post by bennyx » Thu Nov 19, 2015 7:27 am

Oh ok if you say so, you tell so many different story's it hard to keep up with you.

Well either Glenn or you are not telling the truth, I would tend to believe the guy who was actually there doing the mod with Levi.

on old video that i have remove (BRBS 36 research and development) you was see clear....i always have a 77' jmp.....and i have discovered on second time that was a cousin amp of original 36......casuality......but fuckin great.....i have buy it 6-7 years ago from Liverpool.....
anyway ,each person believe that he want believe.....no problem....seems to me very strange that Glenn remind a particular cap or component and don't remind the real maker of 39 superkill mod that are more easy to remind......so for Frank, Glenn don't say completely the truth for make publicity to Caswell.....seems that Glenn and Caswell are very friends......but i want to believe that Glenn have confused after several years and several amps and several works and mods and people......i hope......
i don't want think that Glenn have bad intentions.....but something don't touch......

Post Reply