That would be psu1, psu2 is specifically designed for 1963/3015. For psu 1, pop in 7xxx regs and you're good to go.
Thanks Miro, maybe we'll make it sometime. No mistakes for sure. 🙂
Hi, Please find below the schematic, Gerbers and BOM for Grunf's HV reg. Just for piece of mind, please check if the attached schematic matches the original Grunt's in #10,376. I checked it twice, but better if another pair of eyes sees it too. Please let me know if something is not right. Better safe, than sorry.
F
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Sorry guys, I've been so busy lately that I've had to neglect the forum, I just took a look and that's it 😉 .
The PCB seems good to me , I have not checked every detail but as far as I can see there are no major errors . The only thing I would change is the heat sink for the depletion mosfet which could be much smaller , the dissipation on it even with an output voltage of 300V will not exceed 1W .
The PCB seems good to me , I have not checked every detail but as far as I can see there are no major errors . The only thing I would change is the heat sink for the depletion mosfet which could be much smaller , the dissipation on it even with an output voltage of 300V will not exceed 1W .
I mostly finished my ad1862 dac. It sounds fantastic. Thanks to miro for this great design and all here on this thread.
This is my first DIY dac. I'm still looking to tweak it some. I initially installed OPA134 as a low cost opamp to get me started. I have since installed NE5534 opamps and, to me, they sound more full.
Now I need to find a good case for it. Can anyone offer any recommendations for where to shop for a case or chassis?
Thanks,
Tom
This is my first DIY dac. I'm still looking to tweak it some. I initially installed OPA134 as a low cost opamp to get me started. I have since installed NE5534 opamps and, to me, they sound more full.
Now I need to find a good case for it. Can anyone offer any recommendations for where to shop for a case or chassis?
Thanks,
Tom
Modushop, of course. Or search 'Aluminum amplifier enclosure" on AliExpress and/or eBay and see what you can find.
Try OPA1655 or OPA1641A. For more bass, OPA604 if still available. You will also need an adapter for SOIC8/DIP8
Hello everyone
i am building AD1862 pcb without I/V . it has separate 12v supplies headers for analog left and right . i want to use one PSU2 for both digital and analog. is it ok to feed both analog supplies from one +-12v output of the PSU2 ?
i am building AD1862 pcb without I/V . it has separate 12v supplies headers for analog left and right . i want to use one PSU2 for both digital and analog. is it ok to feed both analog supplies from one +-12v output of the PSU2 ?
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Nice transformers. Source? Also, like your input board. Source as well?
Regards,
Dan
I just will flip the output pads :R/- L-out where you putted gnd output pad and gnd output pad then above. So just reverse the output pads labels. Also, force the output gnd pad to see only the agnd pin.
Simply use the R ad L out traces by letting the coplanar top gnd below the R/L output traces to go until the rigtht edge side of the pcb.
The empty space made by the coplanar gnd to the edge wil isolate the dgnd from the gnd output pin, the return signal will flow to the agnd first.
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@dantwomey Yes. I got one transformer from ebay and the other from aliexpress. The input board I got from aliexpress as well. I'm am still testing it out. The link is below.
AK4118 Receiver Board
AK4118 Receiver Board
sorry i don't understand what you say . i was talking about supplying both seperate headers of +- 12v from one output . (PSU2 has one output for +-12v mostly made for the 1.3 ver. of the AD1862 pcb with the one header for analog supply ). i will lose separation but @zoom777 said it's fine .
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Has anyone tried this input board from aliexpress? If so, what was your experience with it? Thanks, Tom
AK4118 Digital Signal Receiving Board
AK4118 Digital Signal Receiving Board
We haven't tried this one, but it seems very good to me. Pay attention to the power supply, it consumes 300mA at 5V.
The two power pads are okay, I did it too in my pcbs above in the thread.
I try again to explain something else :
I was talking about the signals output conectors: try to redisign it by putting the signal trace nearer from the slot, in spite of the gnd pad in order the gnd pin is seing more the agnd of the ad1862 and not its dgnd . By fliping L/gnd (and R/gnd) outputs trough holes you will achieve this easily: just move of course the signal trace as now he trough holes that was the output signall is now the gnd.
So the gnd hole of the signal output connector is more seing the agnd pin of the dac chip between the cap (C16/C26) in spite of going direct through the top pcb towards the Dgnd pin in your actual pcb layout (along the gnd poor near the isolation sllot).
It is just a small pcb enhancement change. Both will work, but the above better. Do the same for the R/Gnd connector.
I try again to explain something else :
I was talking about the signals output conectors: try to redisign it by putting the signal trace nearer from the slot, in spite of the gnd pad in order the gnd pin is seing more the agnd of the ad1862 and not its dgnd . By fliping L/gnd (and R/gnd) outputs trough holes you will achieve this easily: just move of course the signal trace as now he trough holes that was the output signall is now the gnd.
So the gnd hole of the signal output connector is more seing the agnd pin of the dac chip between the cap (C16/C26) in spite of going direct through the top pcb towards the Dgnd pin in your actual pcb layout (along the gnd poor near the isolation sllot).
It is just a small pcb enhancement change. Both will work, but the above better. Do the same for the R/Gnd connector.
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Can PSU2 be adjusted to give +-20v. According to LT1963A/LT3015 specification it should be possible. 20 v is top limit.
As I have spare PSU2 boards I need PSU for something else.
As I have spare PSU2 boards I need PSU for something else.