Tom - 'Sometimes' that chatter is caused by the angle of the beater, or the bass drum needs a vent hole in the reso head to release air. Those are the two causes of 'pedal chatter' that I know of.

John

26"bass drums are my favorite size. how tight do you have the batter head.? also is the beater hitting the head flat ?

This very problem has been discussed here before, Maybe you will pick up something here..

Cheers

http://www.vintagedrumforum.com/showthread.php?t=25313&highlight=pedal+chatter

Thanks everyone for the great info! I was about to port the res head, then I thought I would try lowering the beater down a little. I did this by replacing my Yamaha pedal,(which I really like) with a speed king. The speed king`s pivot point is lower and it is actually closer to the head( it slides on the hoop ****her). I never noticed this before! That makes the beater hit flatter on the head(less of a angle). No more pedal shatter! Of course I am not as quick with a speed king as I would like, But I will give it a week or two. Thanks again for all of the help. Tommy

I have a powerstroke 3 on the batter and a felt srip on the res, no port. Batter is just past the wrinkles.

Did you try lifting the resonant side of the drum to flatten out your preferred beater? Another option is to bend a beater shaft just a bit to where the beater head will strike squarely when the drum is sitting flatter. I would try those approaches before I switched to a less preferential pedal.

I know Bob Gatzen suggests flattening the drum to remove torque on the batter rim, but I raise all mine just to the point where the beater is square. It usually does not take much. I have seen at least one top session drummer here in Nashville that uses the bent shaft/flat bass drum approach. It works great for him.