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First attempt at making rack ears for the Roland DDR-30
Prototype rack ears for the Roland DDR-30 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

I didn't originally intend to design a pair of rack ears for the Roland DDR-30. My idea was to make a pair of rack ears for the DDR-30. Modelled on the rack ears of my own MKS-80, Lenton Engineering in Watford, delivered yet another superb job, based on my plans.

After a little digging around however, I subsequently discovered that as well as the DDR-30, these rack ears will also fit a whole bunch of other Roland 2U modules from the same era:

  • Roland MKS-7 Super Quartet (released 1986)
  • Roland MKS-10 Planet-P piano module (released 1984)
  • Roland MKS-20 Rack mount version of the RD-1000 digital piano (released 1986)
  • Roland MKS-30 Rack-mount of the JX-3P synthesiser (released 1984)
  • Roland MKS-80 Rack mount version of something in between the Jupiter 6 and Jupiter 8 keyboard synthesisers (released 1984)
  • Roland MKS-100 Rack mount version of the S-10 sampler (released 1986)

Please note that these rack ears are only available in black and as a pair.

When the prototypes were ready to collect, I got a real shock. They seemed to fit better than the originals and they looked just great!

Sold in pairs, these rack ears will be supplied with eight black countersunk pozidrive machine screws.

Sadly, my own DDR-30 was sold many years ago and I can only model these rack ears on my own MKS-80 as pictured.

So, if you're after a pair of rack ears for the Roland DDR-30 or any of the other machines listed above, please either check out my ‘Prices’ page or just contact me for details on RE-MKS-80.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.

First attempt at making rack ears for the Roland MKS-10
Prototype rack ears for the Roland MKS-10 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

I didn't originally intend to design a pair of rack ears for the Roland MKS-10. My idea was to make a pair of rack ears for the MKS-80. Modelled on the rack ears of my own MKS-80, Lenton Engineering in Watford, delivered yet another superb job, based on my plans.

After a little digging around however, I subsequently discovered that as well as the MKS-10, these rack ears will also fit a whole bunch of other Roland 2U modules from the same era:

    • Roland MKS-7 Super Quartet (released 1986)
    • Roland MKS-20 Rack mount version of the RD-1000 digital piano (released 1986)
    • Roland MKS-30 Rack-mount of the JX-3P synthesiser (released 1984)
    • Roland MKS-80 Rack mount version of something in between the Jupiter 6 and Jupiter 8 keyboard synthesisers (released 1984)
    • Roland MKS-100 Rack mount version of the S-10 sampler (released 1986)
    • Roland DDR-30 Electronic drum module (released 1985)

Please note that these rack ears are only available in black and as a pair.

When the prototypes were ready to collect, I got a real shock. They seemed to fit better than the originals and they looked just great!

Sold in pairs, these rack ears will be supplied with eight black countersunk pozidrive machine screws.

Unfortunately, I don’t have a Roland MKS-10 and so the rack ears are shown attached to my own MKS-80.

So, if you're after a pair of rack ears for the Roland MKS-10 or any of the other machines listed above, please either check out my ‘Prices’ page or just contact me for details on RE-MKS-80.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.

First attempt at making rack ears for the Roland MKS-100
Prototype rack ears for the Roland MKS-100 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

I didn’t originally intend to design a pair of rack ears for the Roland MKS-100. My idea was to make a pair of rack ears for the MKS-80. Modelled on the rack ears of my own MKS-80, Lenton Engineering in Watford, delivered yet another superb job, based on my plans.

After a little digging around however, I subsequently discovered that as well as the MKS-100, these rack ears will also fit a whole bunch of other Roland 2U modules from the same era:

  • Roland MKS-7 Super Quartet (released 1986)
  • Roland MKS-10 Planet-P piano module (released 1984)
  • Roland MKS-20 Rack mount version of the RD-1000 digital piano (released 1986)
  • Roland MKS-30 Rack-mount of the JX-3P synthesiser (released 1984)
  • Roland MKS-80 Rack mount version of something in between the Jupiter 6 and Jupiter 8 keyboard synthesisers (released 1984)
  • Roland DDR-30 Electronic drum module (released 1985)

Please note that these rack ears are only available in black and as a pair.

When the prototypes were ready to collect, I got a real shock. They seemed to fit better than the originals and they looked just great!

Sold in pairs, these rack ears will be supplied with eight black countersunk pozidrive machine screws.

Unfortunately, I don’t have a Roland MKS-100 and so the rack ears are shown attached to my own MKS-80.

So, if you're after a pair of rack ears for the Roland MKS-100 or any of the other machines listed above, please either check out my ‘Prices’ page or just contact me for details on RE-MKS-80.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.

First attempt at making rack ears for the Roland MKS-30
Prototype rack ears for the Roland MKS-30 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

I didn’t originally intend to design a pair of rack ears for the Roland MKS-30. My idea was to make a pair of rack ears for the MKS-80. Modelled on the rack ears of my own MKS-80, Lenton Engineering in Watford, delivered yet another superb job, based on my plans.

After a little digging around however, I subsequently discovered that as well as the MKS-30, these rack ears will also fit a whole bunch of other Roland 2U modules from the same era:

  • Roland MKS-7 Super Quartet (released 1986)
  • Roland MKS-10 Planet-P piano module (released 1984)
  • Roland MKS-20 Rack mount version of the RD-1000 digital piano (released 1986)
  • Roland MKS-80 Rack mount version of something in between the Jupiter 6 and Jupiter 8 keyboard synthesisers (released 1984)
  • Roland MKS-100 Rack mount version of the S-10 sampler (released 1986)
  • Roland DDR-30 Electronic drum module (released 1985)

Please note that these rack ears are only available in black and as a pair.

When the prototypes were ready to collect, I got a real shock. They seemed to fit better than the originals and they looked just great!

Sold in pairs, these rack ears will be supplied with eight black countersunk pozidrive machine screws.

Unfortunately, I don’t have a Roland MKS-30 and so the rack ears are shown attached to my own MKS-80.

So, if you're after a pair of rack ears for the Roland MKS-30 or any of the other machines listed above, please either check out my ‘Prices’ page or just contact me for details on RE-MKS-80.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.

First attempt at making rack ears for the Roland MKS-20
Prototype rack ears for the Roland MKS-20 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

I didn’t originally intend to design a pair of rack ears for the Roland MKS-20. My idea was to make a pair of rack ears for the MKS-80. Modelled on the rack ears of my own MKS-80, Lenton Engineering in Watford, delivered yet another superb job, based on my plans.

After a little digging around however, I subsequently discovered that as well as the MKS-20, these rack ears will also fit a whole bunch of other Roland 2U modules from the same era:

  • Roland MKS-7 Super Quartet (released 1986)
  • Roland MKS-10 Planet-P piano module (released 1984)
  • Roland MKS-30 Rack-mount of the JX-3P synthesiser (released 1984)
  • Roland MKS-80 Rack mount version of something in between the Jupiter 6 and Jupiter 8 keyboard synthesisers (released 1984)
  • Roland MKS-100 Rack mount version of the S-10 sampler (released 1986)
  • Roland DDR-30 Electronic drum module (released 1985)

Please note that these rack ears are only available in black and as a pair.

When the prototypes were ready to collect, I got a real shock. They seemed to fit better than the originals and they looked just great!

Sold in pairs, these rack ears will be supplied with eight black countersunk pozidrive machine screws.

Unfortunately, I don’t have a Roland MKS-20 and so the rack ears are shown attached to my own MKS-80.

So, if you're after a pair of rack ears for the Roland MKS-20 or any of the other machines listed above, please either check out my ‘Prices’ page or just contact me for details on RE-MKS-80.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.

First attempt at making rack ears for the Roland MKS-7
Prototype rack ears for the Roland MKS-7 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

I didn't originally intend to design a pair of rack ears for the Roland MKS-7. My idea was to make a pair of rack ears for the MKS-80. Modelled on the rack ears of my own MKS-80, Lenton Engineering in Watford, delivered yet another superb job, based on my plans.

After a little digging around however, I subsequently discovered that as well as the MKS-7, these rack ears will also fit a whole bunch of other Roland 2U modules from the same era:

  • Roland MKS-10 Planet-P piano module (released 1984)
  • Roland MKS-20 Rack mount version of the RD-1000 digital piano (released 1986)
  • Roland MKS-30 Rack-mount of the JX-3P synthesiser (released 1984)
  • Roland MKS-80 Rack mount version of something in between the Jupiter 6 and Jupiter 8 keyboard synthesisers (released 1984)
  • Roland MKS-100 Rack mount version of the S-10 sampler (released 1986)
  • Roland DDR-30 Electronic drum module (released 1985)

Please note that these rack ears are only available in black and as a pair.

When the prototypes were ready to collect, I got a real shock. They seemed to fit better than the originals and they looked just great!

Sold in pairs, these rack ears will be supplied with eight black countersunk pozidrive machine screws.

Sadly, my own MKS-7 was sold many years ago and I can only model these rack ears on my own MKS-80 as pictured.

So, if you're after a pair of rack ears for the Roland MKS-7 or any of the other machines listed above, please either check out my ‘Prices’ page or just contact me for details on RE-MKS-80.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.

Aurora - Switch Mode Power Supply for the Roland MKS-80
Aurora™

My lock-down project, Aurora, a replacement power supply for the Roland MKS-80, is now being built and tested.

Having just received the prototype PCBs only a few days ago, I'm currently assembling them and (very nervously) taking apart my own MKS-80. Please bear with me and I'll get up more information on this exciting project, as soon as I can.

What I can tell you is that Aurora comprises two PCBs, one of which sits on a special mounting plate. The prototype PCBs and mounting plate all fit into the MKS-80 perfectly, lining up snugly with the original PCB mounting studs. Also, the positioning and pitch of the headers is spot-on. That's important as the headers are soldered to the original PCB and are NOT push-on / pull-off connectors like say, the power supply distribution headers on the Roland MKS-70 power supply PCB.

MKS-80 power distribution headers line up perfectly on Aurora prototype Board A
MKS-80 power distribution headers line up perfectly on Aurora Board A prototype

So that's all a really good start. 🙂

I now need to know that Aurora properly powers the MKS-80; voltages are good including reference voltage and the power output of each supply is sufficient to drive the machine.

If you're interested in Aurora replacement power supply for the Roland MKS-80, then please don't hesitate to let me know.

Aurora will be available as a pair of populated PCBs and associated components, soon. Alternatively you can contact me to have Aurora professionally fitted into your Roland MKS-80. Prices will be published as soon as possible on my Prices page.

I often receive questions regarding the Roland MKS-80 output phase correction mod' and without meaning to do myself out of taking your money, I do feel it necessary to ask whether or not you actually need it!

Roland MKS-80 output phase correction mod at Plasma Music

Once upon a time, there were two conventions for delivering a balanced signal via a XLR socket. Both conventions (fortunately) used PIN 1 for earth (0 V). They differed however, in as much that one used PIN 2 for the positive (+), in-phase signal and PIN 3 for the negative (-) out-of-phase signal, while the other used PIN 3 for the positive (+), in-phase signal and PIN 2 for the negative (-) out-of-phase signal.

Back in the day, it was theorised that US and European manufacturers used the first convention while Japanese manufacturers used the second. In the eighties and nineties, I designed and built a lot of recording studios, live performance systems and guitar racks (remember them) and I can tell you that it didn’t really matter who built the gear, stuff was all over the place. You just had to check.

Polarity conventions of balanced signals over XLR connectors

SO WHAT DOES THIS MEAN ANYWAY?

Good question! Most of the time, you can actually ignore the convention used for sending a balanced signal to a XLR socket as it’s all ‘relative’. What I mean by that, is that if the output is from a synthesiser for example and you’re only using the balanced XLR outputs, then if the signal is ‘upside-down’, it’s only upside-down, relative to itself.

If however, you’re using the balanced XLR outputs from a synthesiser and the unbalanced jack outputs, then you will have a problem as the signals on the XLRs will be out of phase to the signals off the jacks. If the amplitude of both sets of outs is the same, you’ll get nothing if for example, when you mix the two together.

You can easily get around this by either phase inverting the respective inputs on your desk or DAW for one set of outputs or by swapping pins 2 and 3 in the XLR connections at one end (only) on the cable between your gear’s XLR outputs and your desk or DAW.

In a recording environment, it’s preferable to use balanced +4dBm so your Roland MKS-80 should only be connected to your desk, using the balanced XLR outputs. If that’s the case, then there’s no need to do anything.

Where phase becomes an issue is when signal processors are daisy-chained, like in the old massive guitar racks from the eighties or… (as previously mentioned) if you’re using both XLR and jack outputs.

You may just want everything to be as standard as possible in which case, things can be done internally with a very simple procedure. So, if you do want the Roland MKS-80 output phase correction mod', then please don't hesitate to contact me.

Roland MKS-80 output phase correction mod at Plasma Music

First attempt at making rack ears for the Roland MKS-80
Prototype rack ears for the Roland MKS-80 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

Following on from my last post 'RACK EARS FOR THE ROLAND MKS-70', I thought I'd better put this one up too, just to make it clear that I also have rack-ears for the Roland MKS-80.

As it tuns out, these rack ears will also fit the following Roland 2U modules:

  • Roland MKS-7 Super Quartet (released 1986)
  • Roland MKS-10 Planet-P piano module (released 1984)
  • Roland MKS-20 Rack mount version of the RD-1000 digital piano (released 1986)
  • Roland MKS-30 Rack-mount of the JX-3P synthesiser (released 1984)
  • Roland MKS-100 Rack mount version of the S-10 sampler (released 1986)
  • Roland DDR-30 Electronic drum module (released 1985)

Please note that these rack ears are only available in black and as a pair.

Like the MKS-70 rack-ears, these are made from aluminium with a back anodised finish on top of a horizontally running mill finish (just like the originals) and of course, they fit perfectly. They'll be supplied with eight black countersunk M4 machine screws.

I'm now happy to announce that these are available to purchase here. Just scroll down the page. or contact me for details on RE-MKS-80.

And finally, a BIG "thank you" to Lenton Engineering in Watford for delivering another precision job.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.

Prototype Rack Ears for MKS-70
Prototype rack ears for the Roland MKS-70 were collected this morning. I didn't get these anodised as I first wanted to make sure that they fitted properly. Pictures of the finished product will be posted very soon.

I've been meaning to do this for a very long time and finally, over lock-down, I decided to design a pair of rack ears for the Roland MKS-70.

I produced some plans from the rack ears of my own MKS-70 and this morning I got a text informing me that the prototypes were ready to collect. I didn’t bother getting these anodised as I wanted to be sure that they fit properly.

Well I have to say that I’m pretty chuffed with myself and Lenton Engineering in Watford. Always following my drawings precisely and consistently delivering perfect prototypes for me since 1985, I just love these guys.

Please note:

  • These rack ears do NOT fit any other Roland module
  • Only available in black
  • Only available in pairs

Made from aluminium with a black anodised finish on top of a horizontally running mill finish (just like the originals), these rack ears will be supplied with eight black M4 countersunk machine screws.

I'm now happy to announce that these are available to purchase here. Just scroll down the list or contact me for details on RE-MKS-70.

I've also designed a pair of rack ears for the Roland MKS-80, which again were based on the rack ears of my own unit. These are more versatile than the MKS-70 rack ears and fit several Roland modules from the eighties. Check out this post for details.

MADE IN THE UNITED KINGDOM

I'm deeply concerned about the environment and the exploitation of labour and so  I always use local manufacturers in preference to the Far East, with the following in mind:

  1. I can be confident that workers are treated fairly and earn a proper wage.
  2. I can be confident of the standard of quality of each item that is delivered to me.
  3. Communication is important and using local manufacturers, all correspondence is quick and understandable.
  4. I believe in supporting the local economy.
  5. I can be confident that the disposal of manufacturing waste is managed properly and in accordance with national and EU law.

Plasma Music uses local manufacturers

Using local manufacturers isn’t the cheapest option but the above points are important to me. I hope that they’re important to you too.