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Author Topic: ADA B200s: Channel A issues  (Read 2567 times)

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Iperfungus

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Re: ADA B200s: Channel A issues
« Reply #15 on: Time Format »

And another thing I'm thinking is that, aside different values, pots could be one LOG (A) and one LINEAR (B)...depending from production's country...I will verify that with a tester.
This could also explain the slight differences among Channel A and B...

I've found that for European production A = linear and B = log, while for USA and Japan (or other eastern countries) A = log and B = linear...

This makes me laugh...  :lol: :lol: :lol:
« Last Edit: Time Format by Iperfungus »
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ADA MP-1 (modified by MJMP)
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Behringer FCB1010 MIDI controller
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1988 Fender Strat Plus
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2010 Simon & Patrick Woodland CW acoustic

MarshallJMP

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Re: ADA B200s: Channel A issues
« Reply #16 on: Time Format »

No the standard is A=log and B=lin, this is always been like this both in EU and US
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Iperfungus

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Re: ADA B200s: Channel A issues
« Reply #17 on: Time Format »

Ok, here we go with some updated and pictures.

I opened it again and I found that:

1) channel A and B pots are both log pots but they have different values (also after cleaning and drying): A measures now 9.97K and B measures 8.7K...yes, they ARE different...  :lol: This "issue" has an easy workaround: set channel A level a little higher...in this way channels sounds very close and past halfway the slight difference tends to zero as soon as max level is reached.
I will change both pots with 10K log new ones (identical).

2) on/off switch has been replaced and it works...but look at its picture how they fixed from the inside...  :facepalm:
I will replace it...

3) IN and OUT jack connectors will be replaced as well (INs have broken plastic threads)

4) the tranny seems original and that low "hum" is just normal transformer "noise". If I remove bottom cover, this "hum" is very, very low...and it gest "a little worse" when I put the cover in place and screw it to the chassis...it just transmits tranny vibrations to the chassis...  :lol: I fixed this with some strips of adhesive paper tape between bottom cover and chassis edges and this made the trick: now I just can hear the normal tranny "hum" without any additional vibration!  :thumb-up:
By the way, it looks the correct one:

http://adadepot.com/mods/ADA-B200S-schematics/ADA-B200S-transformer-220V-50hz.pdf


I post some pictures just to see if someone (MJMP???  :lol:) can identify this unit and see if it's a kind of export item...
It looks like having the chassis of a US unit where they put a 220VAC transformer and a different fuse, removing the white socket (for what was it used on US models???) and replacing it with a black rubber stopper.

@MJMP: can you date this unit from its serial number? Are jack connectors pictures OK? Can you see them right?

By the way, aside from a couple of minor issues that are normal with such used items, this is a great SS power amp.
A very good companion for and a perfect match with the MP-1.
Dead silent even at max levels, reliable, punchy, warm, transparent, thick as a brick and powerful.
I like it with my 2x12 Blackstar cab and I love how it sounds even at very low volume in night time.

Thanks to rnolan and Dante for pushing me down the hill!!!  :banana-rock: :banana-rock: :banana-rock:
 
« Last Edit: Time Format by Iperfungus »
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ADA MP-1 (modified by MJMP)
Marshall JMP1
TC Electronic G Major
Alesis Quadraverb GT
Zoom 9150
Advance Tube Technologies TA '70 tube power amp
Marshall Valvestate 8008 power amp
ADA B200s power amp
Behringer FCB1010 MIDI controller
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal
Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers
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


1987 PRS Custom
1988 Fender Strat Plus
2014 Fender Modern Player Strat
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: ADA B200s: Channel A issues
« Reply #18 on: Time Format »

Other pics...
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ADA MP-1 (modified by MJMP)
Marshall JMP1
TC Electronic G Major
Alesis Quadraverb GT
Zoom 9150
Advance Tube Technologies TA '70 tube power amp
Marshall Valvestate 8008 power amp
ADA B200s power amp
Behringer FCB1010 MIDI controller
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal
Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers
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


1987 PRS Custom
1988 Fender Strat Plus
2014 Fender Modern Player Strat
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: ADA B200s: Channel A issues
« Reply #19 on: Time Format »

More pics...
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ADA MP-1 (modified by MJMP)
Marshall JMP1
TC Electronic G Major
Alesis Quadraverb GT
Zoom 9150
Advance Tube Technologies TA '70 tube power amp
Marshall Valvestate 8008 power amp
ADA B200s power amp
Behringer FCB1010 MIDI controller
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal
Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers
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


1987 PRS Custom
1988 Fender Strat Plus
2014 Fender Modern Player Strat
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: ADA B200s: Channel A issues
« Reply #20 on: Time Format »

........last pics!!!  :banana:
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ADA MP-1 (modified by MJMP)
Marshall JMP1
TC Electronic G Major
Alesis Quadraverb GT
Zoom 9150
Advance Tube Technologies TA '70 tube power amp
Marshall Valvestate 8008 power amp
ADA B200s power amp
Behringer FCB1010 MIDI controller
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal
Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers
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


1987 PRS Custom
1988 Fender Strat Plus
2014 Fender Modern Player Strat
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: ADA B200s: Channel A issues
« Reply #21 on: Time Format »

Take a pic of the tranny as well.

 :thumb-up:

I will attempt to record the buzz/hum too...  :banana-jazz-smiley-emoticon:

Needed no more!  :thumb-up:
« Last Edit: Time Format by Iperfungus »
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ADA MP-1 (modified by MJMP)
Marshall JMP1
TC Electronic G Major
Alesis Quadraverb GT
Zoom 9150
Advance Tube Technologies TA '70 tube power amp
Marshall Valvestate 8008 power amp
ADA B200s power amp
Behringer FCB1010 MIDI controller
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal
Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers
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


1987 PRS Custom
1988 Fender Strat Plus
2014 Fender Modern Player Strat
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: ADA B200s: Channel A issues
« Reply #22 on: Time Format »

looks all stock to me, and from what I can see on the tranny the date code seems to be 05/90, so it's a late 90's model.

Should you need those jacks I have them lying around.
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Iperfungus

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Re: ADA B200s: Channel A issues
« Reply #23 on: Time Format »

looks all stock to me, and from what I can see on the tranny the date code seems to be 05/90, so it's a late 90's model.

Should you need those jacks I have them lying around.

 :thumb-up: :thumb-up: :thumb-up:

Thanks a lot MJMP!
Very good news then!

About those jacks...yes, I need 4 of them!
They are all the same, INs and OUTs...isn't it?
We can talk about this by email!
Thanks a lot again!
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On the run again!

ADA MP-1 (modified by MJMP)
Marshall JMP1
TC Electronic G Major
Alesis Quadraverb GT
Zoom 9150
Advance Tube Technologies TA '70 tube power amp
Marshall Valvestate 8008 power amp
ADA B200s power amp
Behringer FCB1010 MIDI controller
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal
Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers
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


1987 PRS Custom
1988 Fender Strat Plus
2014 Fender Modern Player Strat
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

rnolan

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Re: ADA B200s: Channel A issues
« Reply #24 on: Time Format »

It's good its a later model, ADA changed (improved) the B200s a little bit from the first model that I had. With new jacks and pots (and I'd also highly recommend a full re-flow), it will do you well for years to come  :thumb-up: .
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

Iperfungus

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Re: ADA B200s: Channel A issues
« Reply #25 on: Time Format »

It's good its a later model, ADA changed (improved) the B200s a little bit from the first model that I had. With new jacks and pots (and I'd also highly recommend a full re-flow), it will do you well for years to come  :thumb-up: .

 :thumb-up:

I had some fun with it until 10 minutes ago...  :lol:
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On the run again!

ADA MP-1 (modified by MJMP)
Marshall JMP1
TC Electronic G Major
Alesis Quadraverb GT
Zoom 9150
Advance Tube Technologies TA '70 tube power amp
Marshall Valvestate 8008 power amp
ADA B200s power amp
Behringer FCB1010 MIDI controller
Zoom 8050 MIDI Controller
Zoom FP01 Expression pedal
Blackstar HTV 212 stereo cabinet with 70/80 Celestion speakers
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


1987 PRS Custom
1988 Fender Strat Plus
2014 Fender Modern Player Strat
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
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