Lab supply for cathode bias experiment question..

JandG · 28th July 2008, 01:07 PM

Can I use one of my lab PS's for hooking up cathode bias on some siple SE amp experiments. I am using NiMH batteries most of the time, even my Dewalt cordless drill battery from time to time,. Will the trickle charge be a bad thing for useing a adjustable lab supply for this lazy bias experiment, I just want to be able to hear differances & change output tubes on the quick ..I have know problems have many supplies for one amp I do it all the time, no small children around here. no cats etc..If I can this would be great..This would be for mostly the output tubes in SE as I allways have enough batteries for input & driver tubes.
J & G

rubli · 14th August 2008, 04:20 AM

I would not use such batteries batteries to bias your tubes, any discharged battery will ruin your tube, no problem in using a bench PS, rmember the bias is negative, take care in checking that the negative post is not connected to phisical ground...

regards

Alex

JandG · 14th August 2008, 01:37 PM

O.k., so I can just do this w/ lab supply for grid bias only in - & without the Neg post physicaly grounded. NO cathode bias experiments can be done with lab supply..? I suppose not but want to check.. Thanks J & G

28th July 2008, 01:07 PM	#1
JandG diyAudio Member Join Date: Jan 2005 Location: Washington State	Lab supply for cathode bias experiment question.. Can I use one of my lab PS's for hooking up cathode bias on some siple SE amp experiments. I am using NiMH batteries most of the time, even my Dewalt cordless drill battery from time to time,. Will the trickle charge be a bad thing for useing a adjustable lab supply for this lazy bias experiment, I just want to be able to hear differances & change output tubes on the quick ..I have know problems have many supplies for one amp I do it all the time, no small children around here. no cats etc..If I can this would be great..This would be for mostly the output tubes in SE as I allways have enough batteries for input & driver tubes. J & G

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14th August 2008, 04:20 AM	#2
rubli diyAudio Member Join Date: Feb 2008	I would not use such batteries batteries to bias your tubes, any discharged battery will ruin your tube, no problem in using a bench PS, rmember the bias is negative, take care in checking that the negative post is not connected to phisical ground... regards Alex

14th August 2008, 01:37 PM	#3
JandG diyAudio Member Join Date: Jan 2005 Location: Washington State	O.k., so I can just do this w/ lab supply for grid bias only in - & without the Neg post physicaly grounded. NO cathode bias experiments can be done with lab supply..? I suppose not but want to check.. Thanks J & G

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