Replacment of tube in head

**jnumme** · #1 11-23-2011, 11:04 AM

I have to change out the tube in my hartke lh1000 which is preamp tube but my question is it easy to do and is there any bias adjustments , I wouldnt think so but im not sure and im giggi.g tonight and may need to do a switch out between sets cause I dont have time before hand to do it.

BassmanPaul · #2 11-23-2011, 11:20 AM

Nearly all pre-amp tubes work in Class A. Therefor they are self biasing and need no adjustments.

**jnumme** · #3 11-23-2011, 11:22 AM

Quote:

Originally Posted by BassmanPaul

Nearly all pre-amp tubes work in Class A. Therefor they are self biasing and need no adjustments.

Awesome thanks