QTH.COM Swap Chat

Posted: **Sat Sep 08, 2012 11:16 pm**

does any one here know how design a tube or better and existing tube
if so please contact me.
cegtv1@aol.com
73,paul

Posted: **Mon Sep 10, 2012 12:53 am**

thats a pretty vague question...

elaborate,, just what are you trying to do???

tube design