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Author Topic: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod  (Read 10465 times)

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herbyguitar

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #75 on: Time Format »

Thanks. I was looking at that a while back. I'll have to try it.
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Iperfungus

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #76 on: Time Format »

I've discovered the MP1 has:


When the gain is up around 8.0 and I turn up the preamp/amp, it starts to sing (no guitar, no input). At about 1/3 output.


Sorry mate...a question, since I (still) have to fix a similar issue with mine (V2.1, same mods) since some months (components are ready...I just need to find the time to do the job...).
Is it like a high pitched squealing noise? And does it start appearing when you turn the front Output Level pot over 1/3 and becomes worst over its halfway?

@MJMP: Phil, what do you think about, mate?
« Last Edit: Time Format by Iperfungus »
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Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

MarshallJMP

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #77 on: Time Format »

Did you try to replace those parts we talked about?
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herbyguitar

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #78 on: Time Format »

@Iperfungus: Yes, high pitched and it starts around 1/3 to 1/2 volume. It could also be proximity to the unit with the SC Strat. I'm not too concerned with it yet though. I change tubes and it goes away (always buy from good source that tests their tubes). I think it's one of the new tubes. Probably the Mullard. My biggest problem is in the mid frequency hum that is unbearable at any stage. Not sure where it's coming from but it wasn't there before the mods. I think I've got a messed up ground somewhere...

@MarshallJMP: Been a little strapped for funds (Christmas and Taxes took a lot out of me) so my shipping the MP1 to you will be a little longer.
« Last Edit: Time Format by herbyguitar »
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Iperfungus

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #79 on: Time Format »

Did you try to replace those parts we talked about?

Not yet mate...but I planned to do the job in the next days.
I'm always overloaded with stuff...  :dunno:

I was just curious about herby's MP1, since it has the same mods and a similar issue...even if I had not the same luck with tubes rolling.  :lol:
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Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

MarshallJMP

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #80 on: Time Format »

Well I thought about something, with the higher MDRT voltage, the output voltage of the tube board will also be higher, maybe with some tubes it could be to high for the digital pots. I'll do some experimenting this week, see what I can figure out. Now should this be the problem you can easily solve it by replacing one resistor on the tubeboard so the input voltage on the digital pot is lower.
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MikeB

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #81 on: Time Format »

I'm also having similar issues. Max had been asking me to quantify my squeal but i haven't had an opportunity to get all scientific about  it. With my b200s out  of action, i have been using the mp1 with a cab sim and  going out to pa speakers. My higher gain patches became unusable. Even Turning the gain down a bit hasn't really helped and then if it did , it's not really the solution I'm looking for.  I will try to spend some time this weekend mapping out the limits of the squeal.
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herbyguitar

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #82 on: Time Format »

@MarshallJMP: Would that have anything to do with my noise issue?
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Iperfungus

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #83 on: Time Format »

I'm also having similar issues. Max had been asking me to quantify my squeal but i haven't had an opportunity to get all scientific about  it. With my b200s out  of action, i have been using the mp1 with a cab sim and  going out to pa speakers. My higher gain patches became unusable. Even Turning the gain down a bit hasn't really helped and then if it did , it's not really the solution I'm looking for.  I will try to spend some time this weekend mapping out the limits of the squeal.

Thanks a lot Mike!
That's my point as well: I would use my MP1 with my settings and with no squeal.  :banana:
Because with those mods the overall tone is absolutely great!

So...3 MP-1s....same mods....same issue.
But Phil has some ideas already...and that's what I assumed when I reported the issue...  :thumb-up:
« Last Edit: Time Format by Iperfungus »
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On the run again!

Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

Iperfungus

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #84 on: Time Format »

Well I thought about something, with the higher MDRT voltage, the output voltage of the tube board will also be higher, maybe with some tubes it could be to high for the digital pots. I'll do some experimenting this week, see what I can figure out. Now should this be the problem you can easily solve it by replacing one resistor on the tubeboard so the input voltage on the digital pot is lower.

f**king great mate!!!
That makes sense about MDRT, tube board and higher voltage.
So I'd better wait to replace that OP and those caps we spoke about for this issue with the squeal?
I also used different tubes there but with no improvements...

Are we working on a fine tuning of MDRT mod here???  :headbanger:
« Last Edit: Time Format by Iperfungus »
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On the run again!

Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

MarshallJMP

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #85 on: Time Format »

No not really, I want to lower the output of the tubeboard a bit. Not sure if this will help but it won't hurt anything.
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Iperfungus

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #86 on: Time Format »

No not really, I want to lower the output of the tubeboard a bit. Not sure if this will help but it won't hurt anything.

So, are you going to reproduce the issue and attempt the fix on the tubeboard?
That's an approach that I share a lot.

You must use high gain settings....do you still have the ones I sent you?
If you need them, I'm here.
By the way, if you set OD1 = OD2 = 7.0, Master = 5.0, Bass = 6.0, Mid = 8.0, High = 10.0 and Presence = 12.0, you should reproduce the issue easily.

Now I'll wait for results of your test before opening the MP1 and replacing components.

Should the resistor fix not work, I can swap OP and caps as you suggested and see what happens.
Or you can do that as well.

We need to go step-by-step.
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On the run again!

Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

herbyguitar

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #87 on: Time Format »

...are you hijacking my thread?
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Iperfungus

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #88 on: Time Format »

...are you hijacking my thread?

Me??? NO!!!  :lol:

Just looking for a solution for a common issue.  :metal:

PS. being serious, I can start a new thread if you prefer...
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On the run again!

Rack stuff from Hell:

ADA MP-1 (modified by MJMP)->TC Electronic G Major->Marshall Valvestate 8008 power amp

Marshall JMP1->Alesis Quadraverb GT->Advance Tube Technologies TA '70 tube power amp

Zoom 9150->Marshall Valvestate 8004 power amp
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal

Behringer FCB1010 MIDI controller

Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers

Amps:

Rivera Pubster 25
Blackstar Fly 3 amp + external speaker

Stomps, stomps, stomps...and stomps (Bogner rules!):

TC Helix phaser, Xotic RC Booster, TC Sentry noise gate, Bogner Ecstasy Blue, Bogner Ecstasy Red, Mad Professor Royal Blue Overdrive, Sonic Research Turbo Tuner, TC Flashback delay

Guitars:

2018 Arrogantia Pandora Vendetta 24 HH Trem-1987 PRS Custom-1988 Fender Strat Plus-2016 Custom assembled Fender Strat-2013 Gibson SG Standard-1995 Gibson Les Paul Studio-1991 MIJ Ibanez RG570FM TB-2016 MIJ Ibanez RG655M SPM-2002 Bruno Traverso Custom "Tommy" Silky-2017 Kramer Baretta Special-2010 Simon & Patrick Woodland CW acoustic

MikeB

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Re: Herby's attemt @ SS Mod, Noise Mod, MDRT Mod
« Reply #89 on: Time Format »

Fight!  Fight!  Fight!....
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