I finally solved my Leach amp problem-too late!

Kilowatt · 21st June 2002, 01:44 AM

As I was working on another Leach amp board just now, I noticed that I had not 82 ohm resistors for R32 and R33. I looked over at my other board (the one I burned up trying to figure out why it was clipping) to figure out what I used for it, and I suddenly realized why it had been clipping at about 400mV in. I had used 7.5k resistors instead of 82 ohm (the "k" had somehow slipped by me when I was building that board). What a stupid mistake! If only I had paid more attention, that board would be up and running just fine.

paulb · 21st June 2002, 02:21 AM

Hey, when you start buying parts for your 3600 watt amp, don't forget to get a few fire extinguishers.
Seriously, a second pair of eyes is always good.

Kilowatt · 21st June 2002, 03:30 AM

Ah, yes, but the amp didn't blow up because of my mistake, I shorted something when I was trying to find the mistake.

swede · 21st June 2002, 08:37 AM

;=)

Last time I looked it up, shorting something while trying to find an error is a mistake... And as long as nobody else was helping you, the blame is on you, hence "your mistake"...

I don't want to be a stick in you butt, but this one was too easy to pick on. ;=)

Good luck with your boards! My first Leach Amp board blew up as well, as I shorted the biasing circuitry.

Best regards,
//magnus

21st June 2002, 01:44 AM	#1
Kilowatt diyAudio Member Join Date: Nov 2001 Location: Harlowton, MT, USA	I finally solved my Leach amp problem-too late! As I was working on another Leach amp board just now, I noticed that I had not 82 ohm resistors for R32 and R33. I looked over at my other board (the one I burned up trying to figure out why it was clipping) to figure out what I used for it, and I suddenly realized why it had been clipping at about 400mV in. I had used 7.5k resistors instead of 82 ohm (the "k" had somehow slipped by me when I was building that board). What a stupid mistake! If only I had paid more attention, that board would be up and running just fine.

21st June 2002, 08:37 AM	#4
swede diyAudio Member Join Date: Sep 2001 Location: Geneva, Switzerland	didn't blow up because of my mistake ;=) Last time I looked it up, shorting something while trying to find an error is a mistake... And as long as nobody else was helping you, the blame is on you, hence "your mistake"... I don't want to be a stick in you butt, but this one was too easy to pick on. ;=) Good luck with your boards! My first Leach Amp board blew up as well, as I shorted the biasing circuitry. Best regards, //magnus

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21st June 2002, 02:21 AM	#2
paulb diyAudio Member Join Date: Jun 2001 Location: Calgary	Hey, when you start buying parts for your 3600 watt amp, don't forget to get a few fire extinguishers. Seriously, a second pair of eyes is always good.

21st June 2002, 03:30 AM	#3
Kilowatt diyAudio Member Join Date: Nov 2001 Location: Harlowton, MT, USA	Ah, yes, but the amp didn't blow up because of my mistake, I shorted something when I was trying to find the mistake.

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