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

[bennyx]

Not in the MK7 mod. Its basically a one wire mod with a fender 1st stage

I don't know exactly but probably you have nailed it

[herbvis]

It's nice to see some action in this thread.

Here's a current clip of my amp with some more tweaks. I basically replaced all the ceramic discs with 100v Multilayer C0G's, except the tone stack and PI. I also put in some metal film resistors on the cathodes and lowered my guitar neck tone cap to 15n.

http://sclk.co/s7vh7d

Sounds kick ass! I still think scom sounds a bit off. Maybe lower the gain a little?? But it still kicks ass

[antosimoni]

It's nice to see some action in this thread.

Here's a current clip of my amp with some more tweaks. I basically replaced all the ceramic discs with 100v Multilayer C0G's, except the tone stack and PI. I also put in some metal film resistors on the cathodes and lowered my guitar neck tone cap to 15n.

http://sclk.co/s7vh7d

Sounds kick ass! I still think scom sounds a bit off. Maybe lower the gain a little?? But it still kicks ass

+1 can you please share specs?

[BRMSlash]

Try some CMF65 / RN65 or CMF60 / RN60 plate resistors in the first couple of stages.

I'm using RN60's for my cathodes, but I'd be a bit hesitant to use them on the plates as the RN60's are rated for 300V max working voltage. The RN65's would be a little better at 350V. The B+ in my pre-amp is around the 290V to 300V mark.

[BRMSlash]

Thanks herbvis and antosimoni. Yeah, I think I need to turn the gain down a touch and I also still want to cut a little bit more bass, but have to order some more parts.

I can't provide my complete spec, but I'll state what my first two stages are:

Hot Shield 33k input
1k8/2u2 cathode, 100k plate
22n
2n2//470k
1M gain pot with 220k to ground and 1n bright
10k/100n cathode, 100k plate
10n
470p to ground
1M gain pot
100k grid stopper

[CoffeeTones]

We don't have any type of scheme/cap discussion with Frank on the meet.....after several lives i have decided that 680n make 34 and 36 more manageble (like Frank advice).....just a little smooth, more usefull on every situation.....and don't change voicing....i believe that Frank have used it....but on second time some amp tech have change it on Slash 34 .....Santiago said 100n.....probably 34 was born with 680n and have a little re-mod by other tech...680n don't like at many tech....but is stock on late 70's 1959 jmp cause are a very bright amp....39 was more smooth for her components....i believe that in a UYI period Slash have 680n....100n is a modern change

[dukeamps]

Congrats Benny on meeting Frank

New clip,

http://soundclick.com/share.cfm?id=13226706

less gain clip,

http://soundclick.com/share.cfm?id=13226768

Its from a 1989 jcm 800 50w amp I'm working on at the moment

Cheers

[BRMSlash]

The less gain clip sounds great.

[bennyx]

sir 36 set like 34 with sd1 boss.....UYI sound

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

[dukeamps]

The less gain clip sounds great.

Cheers BRMSlash, thanks for your feedback

Your clip sounds good, maybe try some FX with your scom clip

Here is a clip from my 34 mod doing some AFD tones.

http://soundclick.com/share.cfm?id=13227448

Chinese preamp tubes JJ e34l power tubes, speaker g12h30

cheers

[rockgod212]

wow oh wow, just tried your spec, for the most part anyway. I still have a 8.2k/.22 xtra stage with a 2n2 over the plate, 220p brite cap, no cap over 820r, no sheild trick, still using 10k tail- might switch it out, don't know yet. sounds fantastic, this is one brite ass amp, its that xtra treble peaker that put the finishing touch on the mod, without it the mod sounds dull and theres way too much flubby gain. the sound and tone is there, just got to get use to playing it now

[bennyx]

wow oh wow, just tried your spec, for the most part anyway. I still have a 8.2k/.22 xtra stage with a 2n2 over the plate, 220p brite cap, no cap over 820r, no sheild trick, still using 10k tail- might switch it out, don't know yet. sounds fantastic, this is one brite ass amp, its that xtra treble peaker that put the finishing touch on the mod, without it the mod sounds dull and theres way too much flubby gain. the sound and tone is there, just got to get use to playing it now

[budubum92]

Heres a clip i just did but not finished. just getting used to mixing.

http://www.soundclick.com/player/single ... i&newref=1

[herbvis]

Heres a clip i just did but not finished. just getting used to mixing.

http://www.soundclick.com/player/single ... i&newref=1

Awesome man!! Great recording and modding!!!

[dukeamps]

Here is a scom clip from a 1993 Marshall slp 100w amp, with my 34+36 mod, this amp has winged c el34 tubes, speaker g12h30.

http://soundclick.com/share.cfm?id=13230928

cheers