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Well I must be stupid then !
Well I must be stupid then !
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Old 25th July 2010, 01:14 AM   #1
nigelwright7557 is offline nigelwright7557  United Kingdom
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Default Well I must be stupid then !

Sold a quasi complimentary output 300 watt mosfet amplifier on ebay.

The buyer emailed me tonight saying that it didnt work and I was stupid because when I built it I put in two irfp240's instead of a irfp240 and an irfp9240 !

He tells me he is an expert on amplifiers because he builds them all the time.

How do I break it to him gently that he isnt as smart as he thinks he is and it is possible to have two N channel MOSFETs on an output ?

I guess I could ask him to look up quasi complimentary?

I guess my 30 years of experience in design counts for nothing lol
PCBCAD51 pcb design software. 2018 version out now. https://www.ebay.co.uk/sch/i.html?_f...nload&_sacat=0
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Old 25th July 2010, 02:57 AM   #2
adason is offline adason  United States
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do not bother, let him send it back and refund his money
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Old 25th July 2010, 04:09 AM   #3
mikejennens is offline mikejennens  United States
This speaker DIY thing, it's pretty addicting!
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Well I must be stupid then !
Anyone that will call someone else stupid, especially in a case such as this one, shouldn't even be dignified with an effort of reconciling HIS dilemma. I agree with adason... have him send it back and refund his money.
I hope it works out well for you.
Jolida SJ502A, Squeezebox Touch, Paul Carmody's Sunflowers, Jeff Bagby's Continuums; Planet 10 HiFi's MarkAudio A 7.3 Frugalhorns and MarkAudio CHP-70s, Nola Brio Clones with a Voxel Sub and a bunch of others...
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