Biasing a 5150II... How?

[khabibissell]

My new 5150II has bias test points and an external pot to adjust the bias. How exactly do I go about doing this? Is it a dangerous procedure for someone of average amp/electronics knowledge? Any advice would be helpful as I'd like to be able to rebias it if I decide to change the powertubes.

[ChlorineRR4]

Re: Biasing a 5150II... How?

i think there is a knob under the grille, but dont quote me on this

[khabibissell]

Re: Biasing a 5150II... How?

Yep... A pot and two test points. I'm curious about the procedure itself, meter settings, etc...

[siggy14]

Re: Biasing a 5150II... How?

Goto Peavey forum and do a search and you will find it. If i remember right it is suppose to be a -55VDC and from there you can adjust it a little more or a little less to your liking.

[Shotgun]

Re: Biasing a 5150II... How?

The XXX is supposed to be -55ma at the test points, IIRC, but yup, go to formus.peavey.com and search the amps forum.

I was going to say, "well, you have to start young - teach your amp that Jackson and Charvel guitars are the best, and raise it hearing that every day. It will go up to be biased..." [img]/images/graemlins/laugh.gif[/img]

[JerryP]

Re: Biasing a 5150II... How?

If you really want to know how your amp is biased you'll need a bias probe. The test points on the back of the Peavey amps don't tell you anything about the bias.
Jerry

[Shotgun]

Re: Biasing a 5150II... How?

Whoops, I meant 55v. On the xxx.