Just a word to the wise if you want to do the dualie swap. Alpha makes (at least) two sizes of dual 250 and 500 pots. I bought a few of the 24mm figuring bigger, beefier, better. When I finally popped the bottom off I was surprised that there was no "wafer" on the bottom- it was just a round piece of aluminium. The "waffer" on these is internal and peened onto the bottom of the rotating shaft. There may be a way to get the element off and replace it with the other one without breaking anything, but with my luck I elected not to try that.
The smaller ones are about 16mm in diameter and have the phenolic resin wafer as the bottom of the pot itself- external. Doing the swap took like 90 seconds as demonstrated on Waldo's Excellent Video. Here are two photos of the two different pots:
I got the smaller ones at smallbear. On the meter they all go up a little higher than either 250 or 500, but they feel smooth. Plus with limited space in the control cavity the smaller size should be a benefit (24mm is almost a full inch)- not to mention the height.http://www.smallbearelec.com/Detail.bok?no=736
"Do not write so that you can be understood, write so that you cannot be misunderstood." -Epictetus
First show: 8/16/69 (Woodstock)
Last show: 3/19/95 (Unbroken Chain breakout)
Member of the Four-Decade Club
Charter Member, President & CEO of OAD (Order of the Ancient Deadheads)