Rockford fosgate punch 45HD power supply parts identification - diyAudio
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Old 7th September 2013, 12:30 AM   #1
chipper is offline chipper  United States
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Default Rockford fosgate punch 45HD power supply parts identification

Hey everyone of DIY! I have a rockford fosgate punch 45HD amp that I'm working on for a good friend of mine. And one buz11 shorted as well as R3. I need to know the value and size of that resistor. And CR9 & CR10.

Amp will power and play from both channels clean but the power supply is partially blown.

Can I use IRFZ44 for a sub on the buz11?
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Old 7th September 2013, 02:43 AM   #2
Randy62 is offline Randy62  United States
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For the power supply fets the 44's will work fine.
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Old 7th September 2013, 02:47 AM   #3
chipper is offline chipper  United States
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Quote:
Originally Posted by Randy62 View Post
For the power supply fets the 44's will work fine.
Do you know what the gate resistor value is?
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Old 7th September 2013, 06:09 AM   #4
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100 ohms
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Old 7th September 2013, 06:56 AM   #5
chipper is offline chipper  United States
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Quote:
Originally Posted by Perry Babin View Post
100 ohms
Will 100 ohm resistors work with irfz44? What can i use for CR9 & CR10? Thanks!
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Old 7th September 2013, 08:47 AM   #6
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Those are 1N5366s. The amp will work without them.

Yes. The 100 ohm resistors should work with the Z44s.
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Old 9th September 2013, 04:40 AM   #7
chipper is offline chipper  United States
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Quote:
Originally Posted by Perry Babin View Post
Those are 1N5366s. The amp will work without them.

Yes. The 100 ohm resistors should work with the Z44s.
Are the output fets suppose to get hot not clamped the heat sink? I turned the bias all the way down. Can I replace with IRF540? The originals are buz11. Thanks
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Old 9th September 2013, 04:46 AM   #8
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You're not going to use the amp with the transistors unclamped so it's not really an issue. With the transistors clamped, does it produce clean audio?
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Old 9th September 2013, 04:54 AM   #9
chipper is offline chipper  United States
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Quote:
Originally Posted by Perry Babin View Post
You're not going to use the amp with the transistors unclamped so it's not really an issue. With the transistors clamped, does it produce clean audio?
Yes it does on both channels.
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Old 9th September 2013, 06:33 PM   #10
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If the amp doesn't draw excessive current and doesn't heat up at idle (all FETs clamped), it's probably OK.
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