Guys,
I have a Kicker
ZX 2500.1 Amp come into the shop, Power supply FETS toast, IRF9640/640 shorted on one side of the amp.
Replaced all components and the amp draws excessive current, then goes into shut down.
I determined that one of the output torridal inductor were bad. I substituted one from a similar amp, and the amp is functional.
The outputs in the circuit run warm with the replacement torrid, so I need either wind a new inductor or find one of you in the group here willing to look for 2 in your scrap amps.
I have wound inductors before and I have CM400060 cores here, and I wound a new inductor. The amp runs fine, so far, with the rewound inductor BUT the coils tempature is considerable LOWER that the other 3. I thinks it's due to the permability of the replacement core is different (60).
Anybody have 2 of these coils OR have some experiance with rewind these types of coils?
I have a Kicker
ZX 2500.1 Amp come into the shop, Power supply FETS toast, IRF9640/640 shorted on one side of the amp.Replaced all components and the amp draws excessive current, then goes into shut down.
I determined that one of the output torridal inductor were bad. I substituted one from a similar amp, and the amp is functional.
The outputs in the circuit run warm with the replacement torrid, so I need either wind a new inductor or find one of you in the group here willing to look for 2 in your scrap amps.
I have wound inductors before and I have CM400060 cores here, and I wound a new inductor. The amp runs fine, so far, with the rewound inductor BUT the coils tempature is considerable LOWER that the other 3. I thinks it's due to the permability of the replacement core is different (60).
Anybody have 2 of these coils OR have some experiance with rewind these types of coils?
Attachments
![IMG_0373[1].jpg](/community/data/attachments/366/366328-64f16ae0c1c87779a331b7d2eeb6a092.jpg?hash=ZPFq4MHId3)
It certainly is missing windings on it, compared to the other three transformers. A member here (djQuan) build his own amp and had to use a power supply from a scrap board, he added a few more winds of his own....you may ask him for info/advice.
Check this thread out. I repaired a ZX1000.1 and had to rewound a new inductor using a different core. There are some calculations done with help from Eva.
http://www.diyaudio.com/forums/car-audio/122249-kicker-zx1000-1-repair.html
http://www.diyaudio.com/forums/car-audio/122249-kicker-zx1000-1-repair.html
djQuan,
Thank you for the post reference, looks like you put alot of time and effort into perfecting that repair.
One of the issues I have is, I used a MPP core for the replacement, I ended up using less copper for the wind, to get the same inductance, I have slight heating of the 9640/640's compared to the other 3 amps in the circuit.
I ran that amp for about 15 min into 2 ohms, 3 of the 4 cores heated to 165 degree F, the new MPP core was at 116 degrees F. I realize that is the physics of using thaat core BUT, will this effect the others?
2 sections of this amp are bridged, and then paralleled. What is the effect ?
Is it possible to find the same core as I removed?
Thank you for the post reference, looks like you put alot of time and effort into perfecting that repair.
One of the issues I have is, I used a MPP core for the replacement, I ended up using less copper for the wind, to get the same inductance, I have slight heating of the 9640/640's compared to the other 3 amps in the circuit.
I ran that amp for about 15 min into 2 ohms, 3 of the 4 cores heated to 165 degree F, the new MPP core was at 116 degrees F. I realize that is the physics of using thaat core BUT, will this effect the others?
2 sections of this amp are bridged, and then paralleled. What is the effect ?
Is it possible to find the same core as I removed?
![IMG_0374[1].jpg](/community/data/attachments/367/367598-57bce95c347545847c68fa9ba29ecb71.jpg?hash=V7zpXDR1RY)
Good luck in finding the exact same part.
Lower temps = better. If you want, you can just replace all inductors with MPP for uniformity.
Lower temps = better. If you want, you can just replace all inductors with MPP for uniformity.
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