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

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

Post by CoffeeTones » Mon Nov 18, 2019 4:52 pm

I thought that might be the case. I do that as well. The amp can be changed drastically that way :thumbsup:

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

Post by novosibir » Mon Nov 18, 2019 9:26 pm

CoffeeTones wrote:
Mon Nov 18, 2019 4:52 pm
The amp can be changed drastically that way thumbsup:
Most people, even reputable technicans think, that the current is flowing only inside the wires, cables and components.
But simply a i.e. due to bad lead dress oscillating amp is the proof, that there must be ~something~ more, but outside the wires, cables & components, what's influencing some sensitive circuit spots or areas.

If you aren't dumb and attentive, then you go step by step further, first by trial&error in your personal R&D, then later with your experience, which becomes bigger and bigger with time...

... and finally you KNOW, what happens, if you place this filter R next to this or to the other plate or cathode R on the bord, or better not - and you know before what will happen, if you'd run this grid or cathode wire close or far off this or the other plate wire, aso. aso. aso. 8)

I've had a lot of trial&error in my beginning in the late 80' with lost nights, blood, sweat & tears, believe me :D
About from 1992 onward I've had so much experience, that I knew thing, which even today aren't written in any book available
The fault almost always is sitting in front of the amp :wink:

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

Post by CoffeeTones » Wed Nov 20, 2019 12:04 am

novosibir wrote:
Mon Nov 18, 2019 9:26 pm
I've had so much experience, that I knew thing, which even today aren't written in any book available
And many people who have not experienced this effect will say it is nonsense or phsyco-acoustics. To them I have said "I wish you were here in front of me while I change a few component positions, with no changed parts or values, so I can see your face when you hear the new sound" :shock:

This for me is the reason the world has great sounding, stock JCM 800 amps, mediocre JCM 800 and bad sounding JCM 800 amps, built with mostly the same parts. In some cases the factory builder accidentally got it right. This is only one example.

It is so effective, that an amp can be made tight, loose, bouncy, sterile, having much sustain, having little sustain, having too much bass, having harsh treble, feeling terrible under the fingers and feeling great under the fingers. All without new parts or new solder joints. Like you said, it takes a lot of time under the hood to know how to use this method once you realize what is happening, why it happens and where it happens.
:toast:

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

Post by novosibir » Wed Nov 20, 2019 6:44 am

CoffeeTones wrote:
Wed Nov 20, 2019 12:04 am
This for me is the reason the world has great sounding, stock JCM 800 amps, mediocre JCM 800 and bad sounding JCM 800 amps, built with mostly the same parts.
Exactly :thumbsup:
You're obviously one of them, who got it and you're one of them, who can turn a medicore to bad sounding JCM800 to a great sounding amp. 8)
The fault almost always is sitting in front of the amp :wink:

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

Post by bmwfreq » Wed Nov 20, 2019 4:18 pm

Would the term "FLUX" relate to some degree to this discussion??

And I honestly don't know, that's why I'm asking.
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by novosibir » Wed Nov 20, 2019 7:23 pm

bmwfreq wrote:
Wed Nov 20, 2019 4:18 pm
Would the term "FLUX" relate to some degree to this discussion??
Marty McFly or the Professor should know more about this :mrgreen:
The fault almost always is sitting in front of the amp :wink:

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

Post by Unique » Thu Nov 21, 2019 9:08 am

novosibir wrote:
Wed Nov 20, 2019 7:23 pm
bmwfreq wrote:
Wed Nov 20, 2019 4:18 pm
Would the term "FLUX" relate to some degree to this discussion??
Marty McFly or the Professor should know more about this :mrgreen:
That's too funny! I knew when I saw the word "FLUX" it was coming.

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

Post by ivan H » Fri Dec 06, 2019 4:18 pm

CoffeeTones wrote:
Sun Nov 17, 2019 11:52 pm
Larry, do you use proximity coupling from emitters and recievers to your advantage when building and tuning your amps?
I'm very late to this, I know, but the term you are looking for is "capacitive coupling" between components, leads etc within the amp. This really is the black art of "tuning" the circuit. It's time consuming & is a result of trial & error but can produce outstanding results. Ken Fischer of Trainwreck amps is one (among many of the knowledgeable builders/tuners) who would spend considerable time tuning his amps like this. Cheers

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

Post by CoffeeTones » Fri Dec 06, 2019 5:38 pm

That is related. I have posted on other sites using that terminology in the past. There are other things going on, so it's not limited to that IMO. Every amp is different, so clones built down to the last detail will be different. Trainwreck clones have proven that well.

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

Post by novosibir » Fri Dec 06, 2019 6:01 pm

ivan H wrote:
Fri Dec 06, 2019 4:18 pm
... the term you are looking for is "capacitive coupling" between components, leads etc within the amp.
There's some more than this going on inside an amp and outside of the leads. Capacitive coupling is only one of the factors.
The fault almost always is sitting in front of the amp :wink:

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

Post by CoffeeTones » Fri Dec 06, 2019 6:05 pm

novosibir wrote:
Fri Dec 06, 2019 6:01 pm
There's some more than this going on inside an amp and outside of the leads. Capacitive coupling is only one of the factors.
Exactly :toast:

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

Post by novosibir » Fri Dec 06, 2019 6:22 pm

CoffeeTones wrote:
Fri Dec 06, 2019 5:38 pm
Every amp is different, so clones built down to the last detail will be different. Trainwreck clones have proven that well.
Correct, as long as different doesn't mean worse :D
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by novosibir » Fri Dec 06, 2019 6:34 pm

Or my new version of it with regulated DC preamp tube heaters for less noise floor 8)
Shure, this requires an additional secondary on the PT
- but from one dozen order qty. onwards Pacific turned out very flexible :D
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Re: S.I.R. 100W SuperLead Schematic pt. II

Post by itsneverloudenough » Mon Dec 09, 2019 1:03 pm

Fellas I'm sorry if I'm reviving inactive threads but I've been curious about something: the title and first page of this thread make it clear that there was a "part 1" thread about the SIR amp before this one. Could I ask what was in that thread and exactly why it was hidden/deleted? Also, another thing if you could: where did the "original" baseline specs for #39/36 come from, the ones that everybody on the internet is going off of to do their own versions of #36? I imagine you guys didn't just figure it out by ear!

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

Post by novosibir » Mon Dec 09, 2019 2:13 pm

itsneverloudenough wrote:
Mon Dec 09, 2019 1:03 pm
Fellas I'm sorry if I'm reviving inactive threads but I've been curious about something: the title and first page of this thread make it clear that there was a "part 1" thread about the SIR amp before this one. Could I ask what was in that thread and exactly why it was hidden/deleted?
There's been too much rant & fight over the last 10 pages, so the moderator's have decided at that time, to pull this thread off public - and on the same day I've startet this pt. 2 thread at that time back in Jan 2010

Just have checked in the moderator's section and have seen, that this thread has been entirely deleted, because among many other pulled threads I couldn't find it anymore.
The fault almost always is sitting in front of the amp :wink:

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