Sure Electronics New Tripath Board tc2000+tp2050

[nrg2009]

18.5v and 6.5a is great. that's about what I'm running (4.5a) and it sounds awesome for me! lots of power for sure!

[aquapiranha]

Originally Posted by nrg2009

18.5v and 6.5a is great. that's about what I'm running (4.5a) and it sounds awesome for me! lots of power for sure!

Brilliant. I will save a bit of cash then! thank you!

[dr_vega]

Originally Posted by wushuliu

was there a noticeable improvement when upgrading the coils? I don't think anyone's actually posted about the audible differences when using toroids...

I upgraded the input caps to Dayton poly foils at the same time, so I don't know what they contributed and what the coils contributed. All I can say is that while it sounded good before, it sounds better now, smoother and more detailed, very transparent.

I'm playing with a tube pre-amp and the Sure is very revealing about the subtle changes in sound texture as I experiment with different tubes. It makes tube rolling a lot of fun.

Anyway, you can get a set of first rate coils from Arjen for less than $10 and the installation is easy, so why not? It's worth it just for the fun of the upgrade and satisfying one's curiosity. Go for it.

-dr_vega

[zlab]

Originally Posted by aquapiranha

Brilliant. I will save a bit of cash then! thank you!

When P = I * I * R where R is 4 ohms
I = 5A, for both channel you need 10A RMS at max output, hence I-peak is more than 10A, also according to the specification of Tripath TP2050 you need 30V to reach max output, anything less will cause a drop in output.
It's bettter to have a power supply which is 30V - 36V and capable to deliver at least up to 10A. For one who not looking for max output, can start with 10V.
For those like to replace the output coil, refer specification of Tripath TA2022 (90W), you need coil can handle up to 10A! I can't found anything close to that range and have to DIY. Any good alternative?

[dr_vega]

Originally Posted by zlab

When P = I * I * R where R is 4 ohms
I = 5A, for both channel you need 10A RMS at max output, hence I-peak is more than 10A, also according to the specification of Tripath TP2050 you need 30V to reach max output, anything less will cause a drop in output.
It's bettter to have a power supply which is 30V - 36V and capable to deliver at least up to 10A. For one who not looking for max output, can start with 10V.
For those like to replace the output coil, refer specification of Tripath TA2022 (90W), you need coil can handle up to 10A! I can't found anything close to that range and have to DIY. Any good alternative?

The TA2022 docs are talking about the saturation capacity, not the power handling capacity. If fact, they recommend 22 gauge wire, which has a continuous power capacity of less than 1 amp.

They clearly state that bobbin style coils can't meet their 10A peak saturation requirement. They recommend Micrometals type 2 toroid cores. That is the core that Arjen uses.

The stock Sure coils are bobbins. Replacing them with Arjen's Micrometals toroid coils brings the board up to meet Tripath's most strigent requirements.

-dr_vega

[zlab]

Originally Posted by dr_vega

The TA2022 docs are talking about the saturation capacity, not the power handling capacity. If fact, they recommend 22 gauge wire, which has a continuous power capacity of less than 1 amp.

They clearly state that bobbin style coils can't meet their 10A peak saturation requirement. They recommend Micrometals type 2 toroid cores. That is the core that Arjen uses.

The stock Sure coils are bobbins. Replacing them with Arjen's Micrometals toroid coils brings the board up to meet Tripath's most strigent requirements.

-dr_vega

Gauge 22 wire = dia 0.64516 mm
Refer MIL-STD-975.
Wire Bundle Ampacity (per wire) = 2.22A
Also Maximum frequency for 100% skin depth for solid conductor copper is: 42 kHz
For TP2050 working freq is xxx KHz to over 1 MHz.
For max output you need about 5A RMS, even for DC the about wire dia. is not enough, also it's not all area for transfer that current at the working freq, skin effort have to also consider.
It seen strange that, according to the specification, Tripath even have difficulty to deliver the power just out of the chips.

[aquapiranha]

Originally Posted by zlab

When P = I * I * R where R is 4 ohms
I = 5A, for both channel you need 10A RMS at max output, hence I-peak is more than 10A, also according to the specification of Tripath TP2050 you need 30V to reach max output, anything less will cause a drop in output.
It's bettter to have a power supply which is 30V - 36V and capable to deliver at least up to 10A. For one who not looking for max output, can start with 10V.
For those like to replace the output coil, refer specification of Tripath TA2022 (90W), you need coil can handle up to 10A! I can't found anything close to that range and have to DIY. Any good alternative?

I doubt for my purposes the amps will be running at anywhere near full output, but I wil keep an eye out for any bigger supplies and try them too, thanks.

[Nisbeth]

Originally Posted by Havoc08

Can I ask what a backside like yours cost? Did you send them the enclosure or how does it work?

Did you just mount the stand-offs through the bottom plate or do you have an inlay in the case?

IIRC it was about 45 EUR less VAT and postage, so it is comparable to the cost of the cabinet The mill and engrave new alu plates based on your own drawings. You can have them work on your own chassis parts as well but for this there's no real point.

Stand-offs (8-10mm) are mounted directly on the chassis.


/U.

[sendler]

Originally Posted by zlab

For those like to replace the output coil, refer specification of Tripath TA2022 (90W), you need coil can handle up to 10A! I can't found anything close to that range and have to DIY. Any good alternative?

These 10uH toroid coils look good. Rated for 6.7A. $2.08 each for 10
http://www.mouser.com/Search/Product...y542-2301-V-RC
Very large at 30mm though.

[sendler]

Or, we could use four of these!
http://www.parts-express.com/pe/show...number=255-836