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Old 24th January 2003, 01:35 PM   #61
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Hello Scribble,

The 1 KVA transformer that you have would be fine for Aleph 5 stereo.

Also, the 600 VA would be enough for the stereo Aleph 5, agree
by Mad_K, and I would not use the transformer of lower rating
than this.

I tried to use even 450 VA for stereo, and it worked ok,
but buzzed a bit and become very warm after awhile.

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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Old 24th January 2003, 02:39 PM   #62
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Thanks for that Kristijan

i may be coming to you for some boards soon

see about this group buy first

Joel
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Old 24th January 2003, 02:53 PM   #63
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Hello Folks,

Please read post#46 and post#47 in this thread for details. We need 50 units to start with. But so far it seems only around 20.

Chris
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Old 25th January 2003, 02:15 AM   #64
Coulomb is offline Coulomb  England
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Quote:
Originally posted by chris ma
Hello Folks,

Please read post#46 and post#47 in this thread for details. We need 50 units to start with. But so far it seems only around 20.

Chris
Hello Chris, did you get the DC Resistance specs for those coils?

Anthony
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Old 25th January 2003, 03:03 AM   #65
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Anthony,

Quote:
more info Post #47


Just found out that the coils are 1.3 inches inside diameter(hole)
and the other length is 1.7 inches not sure height or width or what.

The DCR is 0.576, may be this is a little bit too high for you guys.

Mike, if they are not too costly to post then I can get you some, will see..

Chris
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Old 25th January 2003, 06:16 AM   #66
Coulomb is offline Coulomb  England
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Quote:
Originally posted by chris ma
Anthony,

Ohh..sharp breath.

Anthony
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Old 25th January 2003, 07:34 AM   #67
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Quote:
Originally posted by Coulomb


Ohh..sharp breath.

Anthony
One has to be when you have two young babes climbing all over you before they can reach the keyboard!

Chris
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Old 7th October 2016, 05:53 PM   #68
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Hello Kristijan,

-> Will 1/2W resistors be enough for the Aleph - 5 power supply or do I needd to go for a higher value? I am referring to your design available at: PASS LABS CLONE - Aleph-5 PS-X2 Amplifier Power Supply PCB

-> What is the main purpose of using coils in the supply. Original Aleph - 5 supply design is missing this element. Can I use the below inductor?

http://www.mouser.in/ProductDetail/M...52bXt6FmjJ8%3d

---
Best regards,
BP

Quote:
Originally Posted by kristijan-k View Post
Hello Scribble,

The 1 KVA transformer that you have would be fine for Aleph 5 stereo.

Also, the 600 VA would be enough for the stereo Aleph 5, agree
by Mad_K, and I would not use the transformer of lower rating
than this.

I tried to use even 450 VA for stereo, and it worked ok,
but buzzed a bit and become very warm after awhile.

Best regards,
Kristijan Kljucaric
http://web.vip.hr/pcb-design.vip
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Old 8th October 2016, 05:08 AM   #69
Fusor is offline Fusor  United States
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Hello binspaul,

Inductors store energy, filter noise and smooth that pulsating DC. All inductors have a resistance value and all resistors have an inductance value. Where is the most practical point? I tried the parallel resistors and then inductors in a F5 amplifier. My hearing is certainly imperfect. My frugality affects my opinion. I feel the cost of inductors is not warranted. Try PSU Designer 2 at PSUD2. Model both types yourself.

The Murata inductor of your example is rated for 300 ma or 0.3 amp. May I suggest you look for inductors rated for 20 amps at minimum. An example: https//www.madisoundspeakerstore.com/steel-laminate-15-awg/steel-laminate-2.25-mh-15-awg-inductors/. I would actually prefer 12 awg but I can find none. You might ask a local electrical motor repair shop if they could wind you coils of this value. If you have an inductance meter, magnet wire and some ferrite material you could possibly make them yourself. Such coils without the ferrite core are very, very large.

Best wishes sir.

Last edited by Fusor; 8th October 2016 at 05:12 AM.
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