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Amplifiers
Amp Fixin' Advice JBL
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<blockquote data-quote="Spooney" data-source="post: 7229588" data-attributes="member: 584130"><p>FQP50N06 or STP50N06 would work just fine as replacements. FQP50N06 will be easier to come by. I would look at <a href="http://www.futureelectronics.com" target="_blank">Electronic Components from the Best - Future Electronics</a> , <a href="http://www.mouser.com" target="_blank">Mouser Electronics - Electronic Component Distributor</a> , or <a href="http://www.digikey.com" target="_blank">Electronic Components Distributor | DigiKey Corp. | US Home Page</a> . All very reliable parts suppliers. As was mentioned you will want to change all of the FQP50N06's and their gate resistors plus you should also verify that the power supply driver transistors have not went south on you as well. You probably won't wanna hear this but more often than not blown power supply fets are caused by shorted fets/transistors in the output section of the amp. If you have a meter I would start checking between the legs of all the output fets/transistors to see if you read any shorts before you order any parts. You may have a channel or two that needs new outputs as well. Also when you buy fets try to buy at least 10 of what you need even if you don't need that many. Ordering ten plus will help make sure you get matched date coded parts. Parts with matching date codes will increase the reliablity of the amp. You never want mismatched date codes for any parts that are in parallel.</p></blockquote><p></p>
[QUOTE="Spooney, post: 7229588, member: 584130"] FQP50N06 or STP50N06 would work just fine as replacements. FQP50N06 will be easier to come by. I would look at [URL="http://www.futureelectronics.com"]Electronic Components from the Best - Future Electronics[/URL] , [URL="http://www.mouser.com"]Mouser Electronics - Electronic Component Distributor[/URL] , or [URL="http://www.digikey.com"]Electronic Components Distributor | DigiKey Corp. | US Home Page[/URL] . All very reliable parts suppliers. As was mentioned you will want to change all of the FQP50N06's and their gate resistors plus you should also verify that the power supply driver transistors have not went south on you as well. You probably won't wanna hear this but more often than not blown power supply fets are caused by shorted fets/transistors in the output section of the amp. If you have a meter I would start checking between the legs of all the output fets/transistors to see if you read any shorts before you order any parts. You may have a channel or two that needs new outputs as well. Also when you buy fets try to buy at least 10 of what you need even if you don't need that many. Ordering ten plus will help make sure you get matched date coded parts. Parts with matching date codes will increase the reliablity of the amp. You never want mismatched date codes for any parts that are in parallel. [/QUOTE]
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