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Old 9th April 2013, 11:05 PM   #1
shawnk is offline shawnk  United States
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Default US Amps USA400

This amp uses 75344p (TO220) fets for the power supply. All fets are shorted and all gate resistors are burned to a crisp.

None of my trusted vendors have the 75344's in stock so I'd like to confirm that the IRF3205 would make a good substitute. It appears to be a perfect match!

Lastly, I'd like input on a good value to use for the gate resistors.

Thanks!
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Old 10th April 2013, 12:15 AM   #2
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Arrow has the originals.

If you want to use the 3205s, I'd suggest 47 ohm resistors.
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Old 10th April 2013, 12:37 AM   #3
shawnk is offline shawnk  United States
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Thanks Perry.

I've never heard of Arrow so it's nice to find another vendor!

I'll check it out.
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Old 10th April 2013, 01:40 AM   #4
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arrownac.com

If you register (free), the prices are a bit better.
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Old 13th April 2013, 12:15 AM   #5
Tom7227 is offline Tom7227  United States
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Beware of there shipping costs
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Old 13th April 2013, 12:18 AM   #6
Tom7227 is offline Tom7227  United States
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Isn't that a THRILL getting apart?
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Old 13th April 2013, 01:07 AM   #7
shawnk is offline shawnk  United States
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Quote:
Originally Posted by Tom7227 View Post
Isn't that a THRILL getting apart?
?? Actually, I think it's one of the easier amps to disassemble
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Old 13th April 2013, 06:20 PM   #8
Tom7227 is offline Tom7227  United States
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Quote:
Originally Posted by shawnk View Post
?? Actually, I think it's one of the easier amps to disassemble
I thought that was the 4 foot long amp, that slides out with 75 different semiconductors pulling the mica insulators.

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Old 14th April 2013, 02:02 PM   #9
shawnk is offline shawnk  United States
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Quote:
Originally Posted by Tom7227 View Post
I thought that was the 4 foot long amp, that slides out with 75 different semiconductors pulling the mica insulators.

hehe! You're thinking of the VLX400 which is actually TWO of these bad boys in one chassis. Yeah, I can imagine that would be quite a pita to try and remove from the sink
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Old 18th April 2013, 09:42 AM   #10
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Anyone ever worked on a us amps vlx400
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