Hi all,
Planning my first build with Hypex UcD700.
It started w that I found a beefy power supply second hand. Its really heavy. So I got thinking to put it in a separate unit and hoping for tips. What cabling to use for the 62v DC from PSU to the two amplifier units? Is coax good? I plan using wood for the PS box, should I shield it internally w aluminium? Is it useful to add a softstart (thermistor)? Any other gizmos or features that can be good to add?
Not an engineer...
Planning my first build with Hypex UcD700.
It started w that I found a beefy power supply second hand. Its really heavy. So I got thinking to put it in a separate unit and hoping for tips. What cabling to use for the 62v DC from PSU to the two amplifier units? Is coax good? I plan using wood for the PS box, should I shield it internally w aluminium? Is it useful to add a softstart (thermistor)? Any other gizmos or features that can be good to add?
Not an engineer...
First you need dual voltage +/- 62 v dc I guess would work.
Coax is too thin. Thickest cable you can get, also add some extra capacitors inside the amp enclosure to cope with fast transients. Thermistor would not do any good unless you have a large constant power draw say 100W while the UcD 700s will draw say 40W when idle so no.
Thanks, yes its dual voltage.
ok, so thicker is better. How thick for 1m length of cable?
What about shielding?
So softstart is meaningless for the PS?
ok, so thicker is better. How thick for 1m length of cable?
What about shielding?
So softstart is meaningless for the PS?
Specs for the transformer:
Prim 230V
Sec 2x65V
1000VA
Fuse 2x 8A
Edit: UcD700 is supposed to shut down at 96V. This PS should supply some 93V. So hopefully ok.
Prim 230V
Sec 2x65V
1000VA
Fuse 2x 8A
Edit: UcD700 is supposed to shut down at 96V. This PS should supply some 93V. So hopefully ok.
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Lucpes said "add some extra capacitors inside the amp"
Can you hint what specs for those caps and how to wire them you think?
Can you hint what specs for those caps and how to wire them you think?
1000va transformer will probobly need a soft start. If its a toroid then it wont work without one, you will only blow the fuses in your fusebox. I have used this kind and it works:
Soft-Start Circuit For Power Amps.
Thanks for the link.
Yes it is a 1000va toroid transformer and 12 RIFA caps rated at 100 VDC and 4700uF each.
Yes it is a 1000va toroid transformer and 12 RIFA caps rated at 100 VDC and 4700uF each.
Use min. 2.5mm2 cable, No shielding en buy/build softstart.
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Ouch. So transformers for 12V and 15V also. Thanks. Suddenly a lot of cabling. Hmm.
Koifarm, great, I can use the big roll of 4mm2 cable that I havesince 20 years then that fit no loudspeaker connectors.
I will make space for and get a readymade softstart circuit somewhere. Not a thermistor.
So alu/iron shielding is not worthwhile.
The UcDs avoid bumps at on/off. Its built in. So I suppose there are no more gizmos to think about for sound quality or longevity for PS or amps? Ecxcept lots of fuses.🙂
Koifarm, great, I can use the big roll of 4mm2 cable that I havesince 20 years then that fit no loudspeaker connectors.
I will make space for and get a readymade softstart circuit somewhere. Not a thermistor.
So alu/iron shielding is not worthwhile.
The UcDs avoid bumps at on/off. Its built in. So I suppose there are no more gizmos to think about for sound quality or longevity for PS or amps? Ecxcept lots of fuses.🙂
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