modushop.biz
https://modushop.biz/site/index.php?route=product/category&path=303&page=4
Sidepanel 170mm or 230mm or 280mm? 2U?
https://modushop.biz/site/index.php?route=product/category&path=303&page=4
Sidepanel 170mm or 230mm or 280mm? 2U?
Hi Walter
Thanks for the answer.
I know the Modushop store.
Unfortunately, I need different lengths and heights. That's why I'm looking for an aluminum profile manufacturer or dealer like ALU-KÖNIG-stahl.
But they don't have such a profile.
Thanks for the answer.
I know the Modushop store.
Unfortunately, I need different lengths and heights. That's why I'm looking for an aluminum profile manufacturer or dealer like ALU-KÖNIG-stahl.
But they don't have such a profile.
I think you really need to dig deep to find the one cure for your problem. I would contact Zen Mod. He can make anything. But, when you contact him, always call him «Your Grace», «The holy one» or «Prince of Bač». Only then will he - perhaps - help you extrude your wishes.
Pogany:
I don’t understand. modushop sells those side panels separately. Are you saying you need lengths and heights that modushop doesn’t offer?
Regards,
Scott
Different heights and lengths are required.
I asked for a full catalog but he doesn't answer.
Worry about the shipping cost from Italy to Hungary.
If I can't find a solution, I will make it on my own machine from an aluminum sheet
I asked for a full catalog but he doesn't answer.
Worry about the shipping cost from Italy to Hungary.
If I can't find a solution, I will make it on my own machine from an aluminum sheet
They have vacation now, or a week or to more. Gianluca is fast, but not during the vacation. You can reach him by bm «gianluca».
Shipping cost won’t be a real issue. (Innereuropean tariffs probably are better than 🇮🇹-🇨🇭
AFAIK, the heights are fix since it’s extruded profiles and the geometry/cross-section has a „rhythm“.
But this is pure guessing, I am just a small customer, liking modushop‘s products.
AFAIK, the heights are fix since it’s extruded profiles and the geometry/cross-section has a „rhythm“.
But this is pure guessing, I am just a small customer, liking modushop‘s products.
I have answered your email yesterday but it was not not very clear. We can also customize our side panels to have custom dimensions but it will take a bit longer to produce them and they will be more expensive than our standard ones.
Shipping costs should not be higher than 12 EUR if you don't need a lot of panels
Building my own B1 R2. Where does the “virtual ground” between R3 and R4 get connected to?
not sure if I should run the wire:
1. To the rca signal grounds
2. to the chassis
3. nowhere
not sure if I should run the wire:
1. To the rca signal grounds
2. to the chassis
3. nowhere
B1 R2 requires a bipolar power supply which has V+, V-, and Ground.
The bipolar power supply Ground is connected to the Ground of the Power Supply Filter, to the Ground of the Audio Circuit, to the Ground of the signal Input, and to the Ground of the signal output.
The Ground of the Power Supply Filter should also be connected to the chassis ground (safety ground).
The Ground in the Power Supply Filter is a real Ground. This is the best point to connect all of the Grounds together.
The bipolar power supply Ground is connected to the Ground of the Power Supply Filter, to the Ground of the Audio Circuit, to the Ground of the signal Input, and to the Ground of the signal output.
The Ground of the Power Supply Filter should also be connected to the chassis ground (safety ground).
The Ground in the Power Supply Filter is a real Ground. This is the best point to connect all of the Grounds together.
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@Ben Mah I understand that the left and right channel circuits need a bipolar supply. On the first Watt B1 R2 schematic that has been posted, there Is a power supply filter R3,R4 and C3,C4 that has V+ and V- inputs. Isn’t this a unipolar 24V DC supply from a wall wort? (which would not have a ground).
I am editing what I had just written in this reply as it was not correct.
If a unipolar power supply is applied to the Power Supply Filter, the Ground point on the Power Supply Filter would be at one half of the unipolar supply voltage. So it would not be ground.
You need a bipolar power supply.
Another edit, I was wrong again. Two wrongs make a right. A floating unipolar supply connected to the Power Supply Filter will work.
If a unipolar power supply is applied to the Power Supply Filter, the Ground point on the Power Supply Filter would be at one half of the unipolar supply voltage. So it would not be ground.
You need a bipolar power supply.
Another edit, I was wrong again. Two wrongs make a right. A floating unipolar supply connected to the Power Supply Filter will work.
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Yes, but a linear unipolar power supply can be used too, as long as it is floating.
For instance, it cannot be used as a front end buffer of an unipolar power supplied amplifier if the B1 R2 is to be powered by the amplifier power supply..
By the way, it is best to match R4 and R4 in the Power Supply Filter as tightly as possible so that +D and -D are a good match too.
For instance, it cannot be used as a front end buffer of an unipolar power supplied amplifier if the B1 R2 is to be powered by the amplifier power supply..
By the way, it is best to match R4 and R4 in the Power Supply Filter as tightly as possible so that +D and -D are a good match too.
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Ok. If I use a floating supply, I just connect the power filter ”virtual ground” to the audio signal ground? Anywhere else? not Chassis in this case I am guessing.
Fwiw I've built more than a few b1r2s and I've always used bipolar supplies and grounded everything the way Ben Mah said in his first post on the topic and it always works great and sounds great. I really love this buffer. Big thanks to Nelson on this.
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The "virtual ground" at the Power Supply Filter is the point where all circuit ground connections are made, including to chassis safety ground.
What is a good bipolar power supply to use with this? If you use a bipolar supply to use still use the filter on the right side of the schematic?
A good clean supply is Jan Didden's Super Regulator:
https://www.diyaudio.com/community/threads/super-regulator.247281/
https://diyaudiostore.com/products/super-regulator
The B1 R2 Power Supply Filter would not be needed, although perhaps more capacitance is not a bad thing - best to read the Super Regulator information.
https://www.diyaudio.com/community/threads/super-regulator.247281/
https://diyaudiostore.com/products/super-regulator
The B1 R2 Power Supply Filter would not be needed, although perhaps more capacitance is not a bad thing - best to read the Super Regulator information.
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