Thanks,
if I understand correctly, only Case and some mechanical/wiring effort are necessary ?
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500W (4ohm) GaN Class D Modules - Starkrimson Ultra
- Thread starter orchardaudio
- Start date
if I understand correctly, only Case and some mechanical/wiring effort are necessary ?
OP
- Thread Starter
- #22
Correct. No soldering needed.
OP
- Thread Starter
- #23
I ordered 6 boards for initial testing. Should have test results in about 25 to 30 days.
OP
- Thread Starter
- #24
I have created a wiring document on how to connect the SMPS1200 power supply to the amp module(s).
https://drive.google.com/file/d/15WSmoonjk5Gu6yQutwwNLtkNgqelcvpL/view?usp=sharing
https://drive.google.com/file/d/15WSmoonjk5Gu6yQutwwNLtkNgqelcvpL/view?usp=sharing
Looking good!
Regarding PCB+BOM version: are the components readily available via Farnell, DigiKey or Mouser? What about solderability? Looks like IC4 and IC4 might be BGA, or are those just thermal pads?
Regarding PCB+BOM version: are the components readily available via Farnell, DigiKey or Mouser? What about solderability? Looks like IC4 and IC4 might be BGA, or are those just thermal pads?
OP
- Thread Starter
- #26
All components are available from digikey/mouser. The cost of parts for two (2) modules comes to around $420 USD.
There are no BGAs, those are thermal pads. Proper soldering of the GaN FETs is very important, you can review this document:
https://gansystems.com/wp-content/u...ns-for-GaNPX®-Packaged-Devices-Rev-190806.pdf
Great! Thanks for the price indication. That's really quite a big cost for such a small PCB. Obviously only needing a few parts per item does not help here.
That looks quite tricky to do properly with a home solder iron + hot air gun. Does the PCB include a stencil?
Anyway, some good info in help determining if it's worth the risk and effort in soldering it yourself
OP
- Thread Starter
- #28
Lots of high-quality parts. The opamps alone are $90 out of the $420.
Stencil not included. I can provide a stencil drawing so you can have one made.
OP
- Thread Starter
- #29
For those of you that like op-amp rolling and are purchasing the bare board option, op-amps U1 and U2 can be changed to something else that you may prefer. They are just used as buffer stages for the XLR and RCA inputs. So changing these op-amps to something else is low risk.
However, since the amplifier is DC coupled make sure your op-amp has a very low input offset voltage (Vos)
The package is SOIC-8 with a thermal pad. However, the thermal pad is not needed for all op-amps and can be left unconnected.
However, since the amplifier is DC coupled make sure your op-amp has a very low input offset voltage (Vos)
The package is SOIC-8 with a thermal pad. However, the thermal pad is not needed for all op-amps and can be left unconnected.
OP
- Thread Starter
- #30
I am extending preorder pricing until February 15th.
This to allow me to test the initial batch of modules that have been delayed in manufacturing.
This to allow me to test the initial batch of modules that have been delayed in manufacturing.
OP
- Thread Starter
- #31
Just got an email from the manufacturer, the boards are almost ready to ship. Here is a behind the scene pic.
OP
- Thread Starter
- #32
Preliminary Test Results:
OP
- Thread Starter
- #34
I have other equipment I can send to him like PecanPi USB/SPDIF, he has not responded to my messages. So no.
In any case, why do you think his results will be different than mine? We use the same equipment.
@orchardaudio are you planing to release schematics for this one?
Very impressive!
OP
- Thread Starter
- #37
No.
Strange.
Noted but we've seen examples of different APx555 measurements
Chord Mojo one example
OP
- Thread Starter
- #40
Did you know that measurements for my previous amp were verified by a third party (@SIY)?
https://audioxpress.com/article/fre...d-audio-bosc-and-purifi-audio-eigentakt-eval1
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