Bias pots

bentonar18 · Post by **bentonar18** » Sat Mar 04, 2006 5:19 pm

I'm putting together a Mouser order, and I'm curious what you guys are using for the bias pot... any recommendations?

Has anyone every just used a regular 25 k Alpha pot and mounted it to the chassis so you can adjust bias from above the chassis? Would it be heavy enough; ie able to handle the wattage required?

John

tubedogsmith · Post by **tubedogsmith** » Sun Mar 05, 2006 12:01 am

I use a PEC 2 watt locking pot and it works great.

doctord02 · Post by **doctord02** » Sun Mar 05, 2006 2:47 am

I used a Bourns multi turn. About $12 at my local electronics shop I believe.

bentonar18 · Post by **bentonar18** » Sun Mar 05, 2006 9:44 pm

Guys, thanks. The Bourns you mentioned: what wattage is it rated for? Do I need to be concerned about wattage here; will 1/2 watt ratings be enough?

I went back and dug through my NOS supply of Allen Bradley pots my dad gave me (bless you, dad!). I think I have some AB's that are pretty close to the PEC style with the locking threads, but I don't know what they are rated for. They are "Type J" pots with a locking top: the part number on the back is JU-5031. It's roughly a 50k pot; would this work?

Man, I'm getting close to having all my parts together: got the trannies last week, got a Komboking chassis about a month ago, built up my board last week, and recieved my Mouser order last week. I think the last thing I need is the bias pot! I'll try not to get too excited...! thanks

doctord02 · Post by **doctord02** » Mon Mar 06, 2006 5:24 am

1/2 watt should be fine...

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