I needed a Power Transformer for a project, with 14 secondaries.
These dudes ( https://x.alibaba.com/AwA6KK?ck=minisite ) made me one, and finished it 24 hours after I paid. $110 for 2Kva.
Comms were great, and they patiently delt with my alterations.
I haven't tested it yet as it's in transit.
I'm not affiliated with the company in any way, just thought it may be helpful to some.
These dudes ( https://x.alibaba.com/AwA6KK?ck=minisite ) made me one, and finished it 24 hours after I paid. $110 for 2Kva.
Comms were great, and they patiently delt with my alterations.
I haven't tested it yet as it's in transit.
I'm not affiliated with the company in any way, just thought it may be helpful to some.
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Just AUD 110 for 2 kVA and 24 secondaries? It's a bargain, if not to say a gift 
!
Best regards!
!Best regards!
TBH , Im not sure..i kinda assumed the wire would be copper...i guess there is a difference between copper and aluminium as far as audio quality?
Lots of cheap transformers use aluminum wire. Even cheap cat5 cable is copper clad aluminum now. I was wondering why it never tinned well.
The only “good” place for CCAW wire is in speaker voice coils. You do get a higher motor strength to mass ratio with it, for a given amount of system loss. But if a tinsel lead ever opens or goes intermittent you’re looking at full recone (with a preassembled kit only) or replacement Cause you ain’t soldering to the VC wire. With HF diaphragms thats no biggie cause you replace the works anyway. For drivers under very high mechanical stresses, it’s best to stick with regular copper wire VC’s.
Transformers are going to have issues at the terminations, unless real power distribution terminals meant for aluminum wire are used. You usually see those in 2 gauge and up.
Transformers are going to have issues at the terminations, unless real power distribution terminals meant for aluminum wire are used. You usually see those in 2 gauge and up.
The manufacturer has just informed me they used CCAW
So I'm wondering of its worth paying for shipping the CCAW transformer to me, or get a pure OFC one (start again)..
So I'm wondering of its worth paying for shipping the CCAW transformer to me, or get a pure OFC one (start again)..
Not 100% sure, but all modern magnet copper wire on the market is as pure as OFC is certified for.
If that transformer really has to work and does not have to become a decoration on your cupboard, I would have it made in a decent way by a decent professional. Think about your safety as well. 2KVA is a pretty hefty thing.
as long as it delivers the goods, i will take them....
i make my own transformers i use only pure copper wires although the prices have risen 300% in Manila..
i make my own transformers i use only pure copper wires although the prices have risen 300% in Manila..
do you know how much whole thing weighs in kilograms?
also do you have the dimensions of the longest side, then the stack height...
i can judge the cost if you can give me these physical data...
20kg175mmx175mmx185mm..$USD110
For rectification, I use SemiQ high voltage SiC schottky diodes, and OS PIO Pyranol filter caps...so I'm wondering if the CCAW in the power transformer will "sound different" 🤔 (than pure copper wire)
For rectification, I use SemiQ high voltage SiC schottky diodes, and OS PIO Pyranol filter caps...so I'm wondering if the CCAW in the power transformer will "sound different" 🤔 (than pure copper wire)
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CCAW doesn't sound different per se than magnet copper wire, especially not in power transformers. An amplifier that allows you to listen to it's power transformer's »sound« is a poorly designed one. But remember that specific conductivity between aluminium and copper are different by a factor of about 1.5. So aluminium wire cross section has to be 1.5 times bigger than that of copper wire for the same resistance. Hence the transformer needs a bigger core for the same VU rating.
Best regards!
Best regards!
Postage for copper will be higher. And so will the trafo (and not just a little bit). It’s a steal at $100 even with CCAW. The only issue you’ll run into is where the CCAW connects to the outside world. It’s what always fails. You could still get many years of service out of it - it does take thermal cycling, shock, and vibration to get a Cu/CCAW solder joint to fail. That fate awaits all CCAW VC loudspeakers that are played hard, but you can play a lot of gigs before one opens up on you.
Pure aluminum alloy, on gas tight Co/ALR terminals tend to fare better. You can go 50 years before the ones at your electric meter need attention.
Pure aluminum alloy, on gas tight Co/ALR terminals tend to fare better. You can go 50 years before the ones at your electric meter need attention.
