Really nice work. Really good to see a design made from ground up.
Do you get the boards populated and soldered at the PCB manufacture?
Just saw some of your other posts and designs. Did you overcome the high frequency noise problems?
Thanks, 🙂
I got the boards assembled by JLCPCB.
The main source of noise was the discrete switching regulator,
but in this design i used a bd139 for the 12V to drive the fets.
Now its dead silent. 😎
I got the boards assembled by JLCPCB.
The main source of noise was the discrete switching regulator,
but in this design i used a bd139 for the 12V to drive the fets.
Now its dead silent. 😎
Icepower1200as2 just mounted in the housing..
I am still wondering whether to do any heat sink for this module .. but 60C never exceeds on the housing.
I am still wondering whether to do any heat sink for this module .. but 60C never exceeds on the housing.
Hi LubMich:
Nice build! Are you planning on adding another module next to the first module (running 4 channels)? If so, I would definitely add some heatsinking, but you may want to even if running the single module.
This is an internal shot of mine, that was professionally built by Rouge Audio Design/Rome, IT. As you can see, there is a perforated steel false bottom that acts as a heatsink, as well as holes in the bottom and top of the case that are aligned over the module that allow convective cooling. Even with this, the amp is warm (but not hot) during operation.
As an fyi, also, when I corresponded with the builder, he mentioned that he intentionally kept all of the wiring off the bottom plate, due to the heat of the plate. It looks like your binding post wiring might be lying on the bottom of the case.
I'm really happy with mine, and I hope you are too!
Regards,
limits
Nice build! Are you planning on adding another module next to the first module (running 4 channels)? If so, I would definitely add some heatsinking, but you may want to even if running the single module.
This is an internal shot of mine, that was professionally built by Rouge Audio Design/Rome, IT. As you can see, there is a perforated steel false bottom that acts as a heatsink, as well as holes in the bottom and top of the case that are aligned over the module that allow convective cooling. Even with this, the amp is warm (but not hot) during operation.
As an fyi, also, when I corresponded with the builder, he mentioned that he intentionally kept all of the wiring off the bottom plate, due to the heat of the plate. It looks like your binding post wiring might be lying on the bottom of the case.
I'm really happy with mine, and I hope you are too!
Regards,
limits
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I plan to add 2x 300a1 for additional channels. I played the amplifier on the magnepans for the test. They take large currents.. and after 2 hours of playing it did not exceed the temperature as I mentioned above.
I screwed the icepower board directly to the housing sheet ..
View attachment 807416
I screwed the icepower board directly to the housing sheet ..
View attachment 807416
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Cool.
What power are you planning?
Just finished a small module with just 2 x IRFP4227 and ZXGD3003E6 buffers (4R7 gate resistors) , and DT=75nS, running +-50 volts into 2 ohm in a short test with no heat sink at all ... my "coolest yet" ... coil T106-2 with Ø1mm @ 22 uH.
What power are you planning?
Just finished a small module with just 2 x IRFP4227 and ZXGD3003E6 buffers (4R7 gate resistors) , and DT=75nS, running +-50 volts into 2 ohm in a short test with no heat sink at all ... my "coolest yet" ... coil T106-2 with Ø1mm @ 22 uH.
Well they run off a 1.2kw 45v ac toroid, 80000uf pr channel, I don't need all that power but had alot of fun building them, do you build to reach some goal? A planned setup?Cool.
What power are you planning?
Just finished a small module with just 2 x IRFP4227 and ZXGD3003E6 buffers (4R7 gate resistors) , and DT=75nS, running +-50 volts into 2 ohm in a short test with no heat sink at all ... my "coolest yet" ... coil T106-2 with Ø1mm @ 22 uH.
I bought an Earthquake DBXI-15D + SLAPS15, and have put them in a 70l box.
The 400 W is not enough at all ..... I will need around 2kW to get it to max out 😉
Will try with a +-70V supply first. I will need a bigger coil for more than 1kW ...
The 400 W is not enough at all ..... I will need around 2kW to get it to max out 😉
Will try with a +-70V supply first. I will need a bigger coil for more than 1kW ...
That is one hefty bass project you are building, yes definitely heavier gauge coil and sufficient cooling, all those watts into almost short circuit.
For my totempole drivers I modified a 40 by 40 computer heatsink, I like my electronics running cool, that means long life span
My First Assembled And Boxed Class D Amplifier
Finished my first class d amplifier during last week.
Amplifier modules are - LJM L15D-PS
Trafo - Toroidal - 200VA each 36-0-36
Input Buffer - MF X-10D Clone
Tubes - ECC88 NOS Matched Pair
Here are few photos:
Finished my first class d amplifier during last week.
Amplifier modules are - LJM L15D-PS
Trafo - Toroidal - 200VA each 36-0-36
Input Buffer - MF X-10D Clone
Tubes - ECC88 NOS Matched Pair
Here are few photos:
First DIY based on TPA3251
3E Audio : eaumt-0140-2-a (TPA3251)
Toroidal 24VAC made in Poland 300W
Unregulated PSU audiophile grade (4x 10000µF 50V, Nover caps)
O2 free Wires made in Germany
Micro ITX Case re-designed
220V circuit isolated at the top of the case
Hi @daniboun,
Nice build. I recently had a chat with 3e-audio regarding PSU requirements. They have confirmed that SMPS would be better choice for their amps. Did you get a chance to compare the performance with SMPS and LPSU both?
When I place my ears close to the tweeter, I'm getting some hissing noise with L15D-PS. I've tested the same by removing all input connections to the board. Are you getting any such hissing noise with the 3e audio modules?
Hi
Nice work.
Have you noticed a sound difference between the 300A1 and the 1200AS2 since these are not using the same technology if I can say it that way (1200AS2 is IceEdge)
Thanks
Eric
Those are selfmade coils 1mm wire on RM8 cores (with 0.6mm gap), about 30uh inductance.
Lj RM 8S-250nH CF139 Cosmo Ferrites
Really cheap supplier of magnetics. 😉
Unfortunately I am asking myself the same question..
I don't have 300a1 yet .. I will need it for the new speaker project .. I wonder if weaker versions of iceedge will come out..
Korg NuTube preamp board left channel issues
Here is my Class D integrated amp. It has a Pass Labs B1 Korg NuTube preamp with a ClassDaudio CDA-120 power amplifier good for 60W+60W at 8 ohms. The Korg is the 12AX7 for the 21st century as a VFD that acts a dual triode. Still working on issues (hum, channel level mismatches, etc.) but hope to provide listening comments soon.
Here is my Class D integrated amp. It has a Pass Labs B1 Korg NuTube preamp with a ClassDaudio CDA-120 power amplifier good for 60W+60W at 8 ohms. The Korg is the 12AX7 for the 21st century as a VFD that acts a dual triode. Still working on issues (hum, channel level mismatches, etc.) but hope to provide listening comments soon.
Attachments
Very nice, like the nutube, yes the hum can be quite a persistent problem, good luck on fault finding, I post a pdf on most common noise issues, it helped me a ton.