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Old 30th December 2008, 11:05 AM   #1
diyAudio Member
 
Join Date: Dec 2007
Default Power 300 Mosfet schematic ?

Hi gang;


A customer brought in one of these old (orange)Rockford Power
300 mosfet amps that he found in a basement.

It all works but one channel had a blown fuse.
Along with The RFP 18N10 and 12P10 outputs, an MPSA06 driver and a 100 ohm resistor. I replaced all.

There's still distorted audio. Thought the LM833 opamp might be the trouble (had monster audio levels at the non invert input compared to the other channels) Replaced it with a MC1458.
Did not fix.

Looks like the problem is further up the input chain.

I thought I'd check out this forum for a diagram before I start drawing my own. (P.I.A.)
thnx
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Old 30th December 2008, 01:31 PM   #2
diyAudio Member
 
Join Date: Nov 2003
Location: Louisiana
Email me and I'll send it to you. You can also get it from Rockford.

babin_perry@yahoo.com

Check the 3.3vZ. They sometimes short and cause similar problems.
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Old 31st December 2008, 12:04 AM   #3
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I will check the 3.3 zeners.

Wow! The thought didn't even enter my mind that it would still be available from Rockford.
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Old 7th January 2009, 08:05 AM   #4
Jarto is offline Jarto  Mexico
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Join Date: Jan 2009
Default RF Power 1000

Hi Babin Perry, I need schematics for a Power 1000 Mosfet, I hope you know where to find, thanks
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Old 7th January 2009, 01:06 PM   #5
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Location: Louisiana
You can get it from Rockford or if you email me, I can send it to you.

babin_perry@yahoo.com
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