I purchased these chokes to use in the power supply of my Aleph 5 monoblocks build 7448258022 Wurth Electronics | Mouser
I have just realised they are 2x2.2mh, I have 4 of them, but I am not sure how best to use them. Should I just use one per power supply with each rail using half of the choke? Or each rail using the choke in parallel or series to itself.
Thanks.
I have just realised they are 2x2.2mh, I have 4 of them, but I am not sure how best to use them. Should I just use one per power supply with each rail using half of the choke? Or each rail using the choke in parallel or series to itself.
Thanks.
that's nuttin'
good for small current , with substantial DC they're piece of gunk wire
in fact , these are AC line chokes
read datasheet : http://www.mouser.com/ds/2/445/7448258022-71078.pdf
good for small current , with substantial DC they're piece of gunk wire
in fact , these are AC line chokes
read datasheet : http://www.mouser.com/ds/2/445/7448258022-71078.pdf
Oops, wrong thing then. Since I bought this project half started I have not done as much research as I normally would do. They were rated at 8amps DC so figured I was looking at the right things.
What am I looking for then? Does it need to be Air core or is Iron core ok, with 1 on each rail what amp rating/wattage should I be looking for.
What am I looking for then? Does it need to be Air core or is Iron core ok, with 1 on each rail what amp rating/wattage should I be looking for.
air core or hefty iron core
if iron , shoot for more than 2mH , also being sure that choke is declared for at least twice DC Iq
if iron , shoot for more than 2mH , also being sure that choke is declared for at least twice DC Iq
As Zen MOd has said, yours are for RF interference suppression.
If you look for air cored loudspeaker crossover coils you will be closer to what you actually need.
These are 2.2mH 10A coils.
If you look for air cored loudspeaker crossover coils you will be closer to what you actually need.
These are 2.2mH 10A coils.
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Would the Hammond 156B or 159ZL be suitable?
Hammond Mfg. - D.C. Filter Chokes - (153 - 159 Series)
Thanks,
Dennis
Hammond Mfg. - D.C. Filter Chokes - (153 - 159 Series)
Thanks,
Dennis
Start saving up the transformers from broken microwave ovens.
The EI is easily split since there is no interleaving. Then one can add a thin spacer (0.5mm to 1mm) between the E & I to create a gapped core. Ideal for big chokes with a high DC capability.
The EI is easily split since there is no interleaving. Then one can add a thin spacer (0.5mm to 1mm) between the E & I to create a gapped core. Ideal for big chokes with a high DC capability.
Thanks for the help. I just got a little ahead of myself.
I will probably just wind my own air core inductor, 14awg should have the power handling needed.
I will probably just wind my own air core inductor, 14awg should have the power handling needed.
don't wind it.
Buy a reel of enameled copper wire from SWC (Scientific Wire Company). Their retail division has a new name.
Use the plastic reel as delivered.
Buy a reel of enameled copper wire from SWC (Scientific Wire Company). Their retail division has a new name.
Use the plastic reel as delivered.
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Now that's an idea! I didn't think about that, a 750gram spool of 1.6mm wire is probably close enough. And £12.90 per spool is cheaper than most of the alternatives.
In my motor rewind business, I'd have it on the shelf, Its a pity it is 4000 miles away in Florida.
I have bought 100g and 500g and 1kg on plastic reels from them.
The only metal reel was from the 1980s.
I have received my Mega328 tester. It appears to be working, but readout errors are very susceptible to low battery voltage.
Do you want me to measure the inductance of a couple of reels?
The only metal reel was from the 1980s.
I have received my Mega328 tester. It appears to be working, but readout errors are very susceptible to low battery voltage.
Do you want me to measure the inductance of a couple of reels?
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If you get the chance it would be interesting.
I figure the DCR will be in the 0.2-0.35 ohm range with 14awg-15awg. The transformers I have are 25v secondary, so I'm hoping to keep the voltage drop as low as possible.
three unused reels measured.
500g of 2.12mm 0r6 0m16H
500g of 16swg 0r9 0m64H
1000g of 1.8mm 0r7 1m6H
500g of 2.12mm 0r6 0m16H
500g of 16swg 0r9 0m64H
1000g of 1.8mm 0r7 1m6H
The 500g plastic reels are about 57 diam by 61mm long.
Another SWC reel with 500g, via Rapid is smaller, about 51mm diam.
In general the reels are slightly big.
The coils are usually about 2mm to 4mm less in diameter.
Another SWC reel with 500g, via Rapid is smaller, about 51mm diam.
In general the reels are slightly big.
The coils are usually about 2mm to 4mm less in diameter.
Thanks, I have wound coils before, although not as inductors, so I will order 4 reels, and if they are in the ball park use them as is, or just spend a few afternoons winding some inductors.
While a higher DCR might help with filtering, it won't help with output impedance.
I'd say CLC with at least 2 mH and < 0.5 Ohm R inductor provides sufficient filtering in any case.
Just noticed there is something wrong with the R of the coils.
I will re-measure using the ohms function of a DMM.
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