Posted by Jan Lhotak on October 27, 2000 at 21:52:06:
In Reply to: Re: Conn 20J Slides posted by Klaus on October 27, 2000 at 19:23:46:
Just this month, I had my 20J over to Nate Griffith's shop for a valve tuneup... he also had a 20K sousie in the shop at the same time. Both horns were made in the late 1960s, but the valve sets weren't the same; the 2nd valve slide on my 20J measured 0.775", the 20K 0.735"
I recall there also have been some posts in the past to this BBS about the differences in valve set bore dimensions on 20K sousies. Apparently they were made with severeal different valve sets, so make sure of the dimensions before you buy.
Jan