Trouble shooting help

NerdMike · 27th September 2002, 09:50 PM

I just finished my Elliot 3A amp. and I set the bias after raising the voltage to 120 with a variac and all was good. The first time I turned it on with full 120 volt inrush the right channel LED flashed and the minus rail fuse blew. The left channel is fine. All parts are where they belong. Any suggestions with parts to check for infant mortality? It is a tight design and I hate to tear it completely apart. Thanks in advance. Mike

NerdMike · 29th September 2002, 12:08 AM

I replaced the LED, C- cap. and the Output transistor. All is well.
Life is good again.
Thanks, Mike

KenP · 29th September 2002, 12:34 AM

I'm going to start building mine soon and if I can learn of any tips to keep blowing parts it would be good. The first time you started it did you start at a lower voltage and work your way upto 120 volts? Then the next time you started it it blew the fuse? Does it start normally now? Did you use one of Rod's powersupplies? if so which one.

27th September 2002, 09:50 PM	#1
NerdMike diyAudio Member Join Date: Aug 2002 Location: Clearwater, Florida	Trouble shooting help I just finished my Elliot 3A amp. and I set the bias after raising the voltage to 120 with a variac and all was good. The first time I turned it on with full 120 volt inrush the right channel LED flashed and the minus rail fuse blew. The left channel is fine. All parts are where they belong. Any suggestions with parts to check for infant mortality? It is a tight design and I hate to tear it completely apart. Thanks in advance. Mike

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29th September 2002, 12:08 AM	#2
NerdMike diyAudio Member Join Date: Aug 2002 Location: Clearwater, Florida	I replaced the LED, C- cap. and the Output transistor. All is well. Life is good again. Thanks, Mike

29th September 2002, 12:34 AM	#3
KenP diyAudio Member Join Date: Jan 2002 Location: Canada	I'm going to start building mine soon and if I can learn of any tips to keep blowing parts it would be good. The first time you started it did you start at a lower voltage and work your way upto 120 volts? Then the next time you started it it blew the fuse? Does it start normally now? Did you use one of Rod's powersupplies? if so which one.