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  • Thread starter Thread starter codyjarret
  • Start date Start date
I thought it is a VERY convincing "brown sound"....VERY nice
 
rupe":1jybn983 said:
Nice tone...well done :thumbsup:
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bpetersen":1jybn983 said:
I thought it is a VERY convincing "brown sound"....VERY nice
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Thanks guys for checking out my clips. :cheers: :cheers:

Greatly appreciate the feedback.
 
Is this your usual recipe mod wise? Always consistent and good..
 
These mods easily rival the mod5 stuff to my ear. Am I the only one thinking that? They are all great mods though..
 
Shiny_Surface":1czf08qp said:
Wow sounds great Michael as usual.

Really like the cleanish stuff on the 2nd clip as well. :thumbsup:
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Thanks Bro for checking out my clips. :cheers: :cheers:

In the second clip I wanted to show how the amp cleans up with the guitar volume. :)
 
First second in on the first clip and I instantly thought Van Halen. :thumbsup:
 
Filter500":3uv87z33 said:
First second in on the first clip and I instantly thought Van Halen. :thumbsup:
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I appreciate the feedback.
Thank you :cheers:
 
Hey MichaelR/T , you ever do any work on Traynor YBA-1's by any chance? ton of gain on mine virtually stock I bet lifting the tone stack on this thing would make it either really cool or a box of bees.
 
MichaelR/T":11qy8gup said:
Ibanez RG (Dimarzio Tone Zone) '78 JMP 1959 Super Lead (with PPIMV) into Celestion Greenbacks.
I just finished modded the amp head a little and grabbed some greenies. :D
Let me know what ya think of these two clips.

Cheer's Michael

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

https://www.soundclick.com/player/single ... i&newref=1
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If i could i would send you the signal test of my kemper so you could process it thru your JMP and send me back the result. ;o))))
 
This is the thread I started about blocking distortion on the amp..viewtopic.php?f=3&t=129051 It is picky as hell it seems! In the thread I posted my specific schematic but on the last page of this PDF http://www.lynx.bc.ca/~jc/YBA1Schems.pdf is the closest schem to mine. Unfortunately these aren't the clearest.

Anyway, the tone I am going for is anywhere from standard plexi to a bit more oomph. I actually got close to insane VH gain levels but boy was it unstable. The problem with this amp is that any bypass caps I try seem to cause blocking distortion and the amp splats out to nothing. I can't have anything on V1 or V2 it seems.Once I removed them, presto, back to life. I think the 1.5k resistors off the input in the first stage are causing a lot of grind. Already dropped one down to 1k (high treble channel or Volume II) and will prob drop down normal channel / Channel I to 820 as well because when i jumper channels to be able to mix them, there is some note decay because the gain at that first stage is probably overloading.

Other changes I made were to up the mixer resistor values, change the PI section to that of a plexi, and drop my NFR to around 52-53 (68k bypassed with a 15k, all i had on hand)

This thing is a gainy monster though. I installed a 1 meg audio pot on Volume II in place of the 500k pot that was there to try and get more headroom but this thing is cranking at 4.

So if anything pops out at you let me know!
 
Nice clips, Michael. Sounds good. Care to share what you are doing inside the amp? :D
 
MichaelR/T":30ju50ux said:
Rogue":30ju50ux said:
Nice clips, Michael. Sounds good. Care to share what you are doing inside the amp? :D
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If you want to try the mods out on a Marshall Super Lead, here a schematic of the circuit and with the changes I made.

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Thanks for sharing, Michael. It's nice to see your mods before you lock them up as "secret". :)

So it looks like the differences from stock (or at least significantly), is the 820 ohm cathode resistor on the first gain stage, the 330uf bypass cap on the V2 cathode, and a 1500pf treble cap on the bright channel volume. And the PPIMV, of course. The NFB seems to be connected to the center lug of the impedance selector. Is that right?

It looks like everything is set up for more gain, but also give more gain on the bottom end which I don't really hear in your clips. Your bottom sounds pretty solid. The 1500pf treble cap would be the only thing I see to cut any low end, and only if your not maxing it out. What is your normal channel volume level in your clips? Just curious how this setup is giving you so much treble without the flubby bass.

And what's up with the "low power mode" as noted at the bottom right on the non-standard standby switch? Is that something you are doing?

Thanks again man. You be cool.
 
MichaelR/T":3lx4rzyp said:
The V2a cathode is a 820r with a .68uF bypass AND bypassed again with a 330uF.
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Yes, which is essentially 330uf. I don't think the .68uf is making much difference there in that setup. Still, a fairly large value, which would extend into the low end, right? I guess it helps to keep the voltage drop of the cathode resistor across nearly all frequencies consistent, though. I think I'll try that and see what happens. Curiosity is getting to me.

MichaelR/T":3lx4rzyp said:
The NFB is connected to one of the output jacks and that's where I connect my speakers.
Follow the purple wire. ;)
This is helping the tightness in the bottom-end and top-end.
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Yeah, it connects to your jack, which is connected to the center lug of your impedance selector. I've just not seen it done this way. I guess it really doesn't matter other than it might be variable now depending on your impedance selection. Usually it is tied to one of the three. You running 16 ohms?

MichaelR/T":3lx4rzyp said:
The bright cap (1500pF) is adding the fizz.
Click to expand...
Where are you running your channel volume?

Thanks again for your time.
 
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