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Marshall JVM410 Mods 
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Last edited by TTBull on Wed Nov 02, 2016 12:15 pm, edited 1 time in total.



Sat Apr 09, 2016 9:05 am
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Will definitely look into these mods... such a horribly noisey amp.

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Sat Apr 09, 2016 10:08 am
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Wow - very interesting...

I don't suppose you have recommendations for similar improvements on the current-model DSL100H?

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Sat Apr 09, 2016 10:14 am
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Last edited by TTBull on Wed Nov 02, 2016 12:15 pm, edited 1 time in total.



Sat Apr 09, 2016 10:22 am
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Awesome! :drool:

:welcome: to the board (if I haven't already said so before). This is a hell of a good way to start!

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Co-founder of the Jet Setters 2.0 (Jet ★ City Lounge Redux)

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  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Sat Apr 09, 2016 10:24 am
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Last edited by TTBull on Wed Nov 02, 2016 12:15 pm, edited 1 time in total.



Sat Apr 09, 2016 10:27 am
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Well, it sure violates something :thu:

Looks awesome - is it DIY or bought?

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Co-founder of the Jet Setters 2.0 (Jet ★ City Lounge Redux)

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  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Sat Apr 09, 2016 10:31 am
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Last edited by TTBull on Wed Nov 02, 2016 12:14 pm, edited 1 time in total.



Sat Apr 09, 2016 10:32 am
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Wow - great job on that!

What did you use? I want to have my kids do some artwork on cloth for my studio (obviously the content would be a bit more tame :D ), and I need some kind of acoustically-transparent way of letting them go at it - this looks perfect!

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Co-founder of the Jet Setters 2.0 (Jet ★ City Lounge Redux)

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  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Sat Apr 09, 2016 10:36 am
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Last edited by TTBull on Wed Nov 02, 2016 12:14 pm, edited 1 time in total.



Sat Apr 09, 2016 10:44 am
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I put a 10 H choke on the 410 that I owned and it killed a good bit of the noise also. Curious to see what you come up with. Welcome!

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Sat Apr 09, 2016 11:03 am
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Last edited by TTBull on Wed Nov 02, 2016 12:14 pm, edited 2 times in total.



Sat Apr 09, 2016 1:51 pm
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Sat Apr 09, 2016 2:09 pm
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Sun Apr 10, 2016 10:24 am
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nice mods, mine was modded by Dan Gower and with a few mods you can change the amp from good to great. Mine sounds so open. there is a slight noise but the gain reduction mod can help with that.

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Mon Apr 11, 2016 3:05 am
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Last edited by TTBull on Wed Nov 02, 2016 12:12 pm, edited 1 time in total.



Mon Apr 11, 2016 10:12 am
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Last edited by TTBull on Wed Nov 02, 2016 12:12 pm, edited 1 time in total.



Fri Apr 15, 2016 2:39 am
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TTBull wrote:
Image

This will fully kill all the floor noise in...all the high gain modes in the amp

this is the peavey JSX noise gate....works great for the jvm410.

Edit: ill have some pics of this installed shortly



Ineresting

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Fri Apr 15, 2016 4:09 am
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Tue Oct 11, 2016 9:34 am
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Aw man, didn't get TTBull's mods for this amp, have
a JVM210h on the way and thought this post wasn't
going anywhere and didn't think to write them down.

He is the only person to address the noise these amps
make in the overdrive Orange/Red channels, the JVM
forum has ZERO on this problem.

Did remember he said the Plates and some resistors to ground
were carbon film and there is drift as well due to them.

Also he said that he preferred a certain type of metal film,
PRP and Caddock.

Anyone else happen to get the resistors written down? Promise
won't share or post anywhere else, as sure TTBull pulled the post
as not to share valuable information too broadly.

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Thu Nov 03, 2016 9:07 pm
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Why did he pull his post?

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Thu Nov 03, 2016 10:04 pm
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hadley101 wrote:
Aw man, didn't get TTBull's mods for this amp, have
a JVM210h on the way and thought this post wasn't
going anywhere and didn't think to write them down.

He is the only person to address the noise these amps
make in the overdrive Orange/Red channels, the JVM
forum has ZERO on this problem.

Did remember he said the Plates and some resistors to ground
were carbon film and there is drift as well due to them.

Also he said that he preferred a certain type of metal film,
PRP and Caddock.

Anyone else happen to get the resistors written down? Promise
won't share or post anywhere else, as sure TTBull pulled the post
as not to share valuable information too broadly.

The choke mod helps the noise, but it's still unfortunately a noisy amp. I had two and did almost all of the JVM forum mods, and a JCM800 with a boost sounds much better.

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Good deals: Guitar Billy, Crunchtime, Draco Aron, Holy War, Crank, Yo Squig, Moops, Elemenope, Edge of Darkness, Abstract, Chris JD, Ricky Rockhardo, Norton 666, Freehandarson, Dolf, Van_Muddlestein, Yarbicus, Schweezly, Nateispro, Conky, MikeO, Whiskey Face, Broslinger, Mamberg, Ajaxlepenski, Ovid 9, SAH5150, Axe, Greatmutah, Rubyguitargod, Hardvalve, JerEvil


Thu Nov 03, 2016 10:08 pm
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What happened to all TTBull's postings? :(

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Gear
  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Thu Nov 03, 2016 10:17 pm
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Maybe hosting the pictures is a problem

Also his work is very unique and significant
for the JVM, probably wishes not to give his work
away.

No one else has this kind of mod for the JVM
other than the Mod shops, ie. Voodoo mentions
lowering noise in their standard mod

Hopefully someone in the forum was able to save the
page or write down the resistors, he also had a few
mods that aren't in circulation at the JVM forum.

Learned my lesson the painful way, usually the only
way that actually learns me good. :facepalm:

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Fri Nov 04, 2016 7:31 am
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It's still cached if you're quick: http://webcache.googleusercontent.com/s ... clnk&gl=uk


Fri Nov 04, 2016 7:37 am
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Got that saved away in my Evernote now :thu:

Unfortunately, the DSL mods thread he started doesn't appear to have been cached :(

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Co-founder of the Jet Setters 2.0 (Jet ★ City Lounge Redux)

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  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Fri Nov 04, 2016 8:00 am
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Too recent I guess. I think most of it was the same kind of stuff or about the lack of a feedback stabilisation cap in the PI.


Fri Nov 04, 2016 8:32 am
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weeeeeeak

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Fri Nov 04, 2016 8:38 am
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The JVM forum has a lot of great mods, the gain reduction mod removes noise and still leaves you with tons of gain.

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Fri Nov 04, 2016 9:00 am
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Thank you Zozobra!

Was able to save a copy thanks to a gentleman
and scholar :thu:

Know these amps get a bad rap for being modern but
prefer the stiffness and higher gain the JVM has.

The only bummer is all the noise the OD Orange/Red
channels have.

Was able to knock the noise floor down to nill
on my SL-X 2100 going after the Plates with
Vishay RN65 resistors. Someone else has that
amp now.

Being a metal player need all the gain in Orange
and wish to use Red at least half way without
a wall of hiss and white noise. Add screeching
feedback to the mix too and makes for
a poor experience.

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Last edited by hadley101 on Fri Nov 04, 2016 11:03 am, edited 1 time in total.



Fri Nov 04, 2016 9:25 am
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Zozobra wrote:
Too recent I guess. I think most of it was the same kind of stuff or about the lack of a feedback stabilisation cap in the PI.

I was primarily interested in the stuff the stuff he did on the DSL with the tone stack and about controlling heater voltage on the Pre's

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Co-founder of the Jet Setters 2.0 (Jet ★ City Lounge Redux)

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  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Fri Nov 04, 2016 10:14 am
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...there was something about putting a second (same) resistor on the stock slope resistor to bring it down (100k to 50k so it'd be closer to 48k that's more commonly used or something like that)

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Co-founder of the Jet Setters 2.0 (Jet ★ City Lounge Redux)

Gear
  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Fri Nov 04, 2016 10:16 am
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I think it was a split load iirc. They have their uses but do add noise and the same result can be achieved with a voltage divider usually unless there is a specific bit if cap tone shaping.


Fri Nov 04, 2016 11:27 am
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Read through the JVM cache and see he's planning to
add more mods and took down what he posted,
he intends to post more about increasing the gain.

Did the same thing in the DSL post, he added another
mod after taking down the first ones.

Either way thanks for sharing man

;)

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Sat Nov 05, 2016 12:44 pm
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Sat Nov 05, 2016 1:23 pm
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So it's not just me that smells something fishy?

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Co-founder of the Jet Setters 2.0 (Jet ★ City Lounge Redux)

Gear
  • CEOwLP (Sig T), Carvin DC135, Squier strat
  • DSL100H, 1960AX, Mark III, homebrew 2x12 (C90 / EVM12L Thiele), '73 Fender Pro Reverb, POD HD500X (Church rig), JCA50H
  • PLX GABion, Crybaby, Small Clone, DL8, MXR108, Algal clone, Pharaoh (thanks Greg :bow:)

DIY

Help out MISTER NOBODY: https://www.gofundme.com/34f76sf4


Sat Nov 05, 2016 1:50 pm
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0.o

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Sat Nov 05, 2016 2:00 pm
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Been quite a long time since witnessing someone post
tech and then pull it. Used to be the norm on another
forum but still makes me wonder why it's done.

Anyone know what happened to TTBull ?

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Sat Nov 05, 2016 8:46 pm
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