I need a wall-adapter-based power supply, AC/AC from 120VAC to 30VAC @ .6A or higher. I need it to terminate into a barrel connector, or I can modify an available supply to include one. Any idea??
I've tried:
Mouser
DigiKey
eBay
Amazon
Jameco
and a dozen other search-result-given clearance and hobby websites. The max AC output of the products listed in the above sites is 24VAC. I wish more eBay and ALL Amazon sellers knew a thing or two about how to list electrical components for essential details!
Thanks! One more thing: There is no budget for DIY, hackjobs, etc. This is a professional project.
I've tried:
Mouser
DigiKey
eBay
Amazon
Jameco
and a dozen other search-result-given clearance and hobby websites. The max AC output of the products listed in the above sites is 24VAC. I wish more eBay and ALL Amazon sellers knew a thing or two about how to list electrical components for essential details!
Thanks! One more thing: There is no budget for DIY, hackjobs, etc. This is a professional project.
It's much simpler to use a wall mount switching supply that outputs DC. Those are available up to 48VDC.
https://www.mouser.com/MEAN-WELL/Po...ers/GSM12U-Series/_/N-brwlv?P=1y8uhfxZ1z0zl9b
https://www.mouser.com/MEAN-WELL/Po...ers/GSM12U-Series/_/N-brwlv?P=1y8uhfxZ1z0zl9b
Hi Rayma,
I appreciate that, but I do not have the ability to modify the internal circuits of the device being powered (cost of hourly labor for a consumer audio device). Neither can I open a SMPS or DC-outputting wall device to remove the rectification circuitry.
I appreciate that, but I do not have the ability to modify the internal circuits of the device being powered (cost of hourly labor for a consumer audio device). Neither can I open a SMPS or DC-outputting wall device to remove the rectification circuitry.
Some internal power supplies will take either AC or DC, at different voltages of course.
Is there an internal transformer or voltage doubler in the product? If not, you may be
able to use an external DC supply, if it has a FWB for example.
AC wall adapters seem to go only up to 24VAC.
Is there an internal transformer or voltage doubler in the product? If not, you may be
able to use an external DC supply, if it has a FWB for example.
AC wall adapters seem to go only up to 24VAC.
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Thanks Rayma,
Unfortunately this one cannot. I have seen how the power supply circuit operates, and it is not just a simple .6V drop and we're home. Besides, an aftermarket 30VDC power supply adapter was provided with the project, and it was tried with no success.
Unfortunately this one cannot. I have seen how the power supply circuit operates, and it is not just a simple .6V drop and we're home. Besides, an aftermarket 30VDC power supply adapter was provided with the project, and it was tried with no success.
If there's not enough quantity to go custom, there may not be another option.
There may be safety regulations coming in above 24VAC.
There may be safety regulations coming in above 24VAC.
You will have to get a transformer made
About $10 here for that rating.
Or look for amplifier supply transformers, but those will be too big, otherwise quite a simple hack.
Or find a 15-0-15 transformer, 1 ampere (the sellers ratings are very optimistic), use it as 30 volts. Better if you can find a 1.5 or even 2 amp unit.
The hard work of cord, housing, and final assembly is needed...put a switch and indicator, also a fuse.
About $10 here for that rating.
Or look for amplifier supply transformers, but those will be too big, otherwise quite a simple hack.
Or find a 15-0-15 transformer, 1 ampere (the sellers ratings are very optimistic), use it as 30 volts. Better if you can find a 1.5 or even 2 amp unit.
The hard work of cord, housing, and final assembly is needed...put a switch and indicator, also a fuse.
Can you use two 15V wall transformer instead?
Heavy Duty 15 VAC 1 Amp Power Adapter Wall Transformer Screw Terminal 15V 1000ma | eBay
Heavy Duty 15 VAC 1 Amp Power Adapter Wall Transformer Screw Terminal 15V 1000ma | eBay
Thanks everyone,
This is a 1U rackmount Tube DI. No extra space inside, but I do understand that a custom enclosure externally is possible. But cost of custom is.. expensive.
*This cannot be custom. Does anyone know of sources, like weird small motor devices, kitchen appliances, etc that carry a 30VAC power source? I would really like to find the name of a website that stakes it's business on the breadth of power adapter varieties, but if I cannot it would be great to just go on eBay and look up "Radio Shack mini bench grinder" or "rock tumbler" and find a 30VAC power supply that way.
This is a 1U rackmount Tube DI. No extra space inside, but I do understand that a custom enclosure externally is possible. But cost of custom is.. expensive.
*This cannot be custom. Does anyone know of sources, like weird small motor devices, kitchen appliances, etc that carry a 30VAC power source? I would really like to find the name of a website that stakes it's business on the breadth of power adapter varieties, but if I cannot it would be great to just go on eBay and look up "Radio Shack mini bench grinder" or "rock tumbler" and find a 30VAC power supply that way.
The National Electrical Code limits low power circuits to 24 volts. Although you can find power supplies above that, they have to be internally current limited.
However most AC units are not regulated so you might look at trying a 24 volt AC supply at say 2 Amps. The voltage will be higher at a .6 amp draw.
However most AC units are not regulated so you might look at trying a 24 volt AC supply at say 2 Amps. The voltage will be higher at a .6 amp draw.
