What work did you do to this amp?
When you bend the components (that won't be replaced) away from the heatsink, do so as little as possible. Bending too far will add stress to the legs and make them more likely to break (which could cause the amp to fail).
When you bend the components (that won't be replaced) away from the heatsink, do so as little as possible. Bending too far will add stress to the legs and make them more likely to break (which could cause the amp to fail).
Replaced the ef pairs and fets.
The mosfets in this amp are so close together the only way to get the clips off is to slide them over 1 fet width bending them down as u go.
The mosfets in this amp are so close together the only way to get the clips off is to slide them over 1 fet width bending them down as u go.
It's better if you make a tool for it but I don't understand why that requires that you bend the semis so far forward. I could understand if you were using pliers but not using the hole.
The fets are so close together they block the center hole. I had to bend the fet down next to the clip and tap the clip over behind the fet to gain access to the hole
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MN send me your address I'll make you a tool to remove and install the clips. Unless you get south of the cities. I'll foot the bill.
Have you tried getting a regular (flat) screwdriver in the hole and prying up to get more clearance?
Have you compared the drive signals at ALL of the FET gate legs to see if they differ?`
Have you compared the drive signals at ALL of the FET gate legs to see if they differ?`
Before I attach the output section the waves are perfect. Wouldnt that indicate a fault in the output section?
Okay so when I power the amp up initially the waves look like they did in the picture at the beginning of the post but if I turn it off and then turn it back on before the rail voltage drops the wave becomes noisy and unstable. I posted a pic. Its like the signal from both banks is present flickering in and out
Attachments
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I think whats happening is when I initially power it up without signal the output section isn't kicked on but if there's any rail voltage present when it Powers up then the output section kicks on also. For some reason loading the power supply it's causing issues.
#16 is a gate signal. The previous were drain signals.
You need to set your scope to display values for the proper probe setting -- 1x or 10x or list the scope settings in the text. This looks like an 80v signal according to the scope.
You need to set your scope to display values for the proper probe setting -- 1x or 10x or list the scope settings in the text. This looks like an 80v signal according to the scope.
