ORIGINAL MESSAGE: On Mon, 16 Jul 2012 22:22:46 -0500, K9WXR wrote: > >Leave the tubes in the sockets, remove the plate caps, REPLY: For the initial rough tuning you can leave the plate caps disconnected, but for the final settings, connect them. The tube's plate-to-ground capacitance is an important part of the total plate tuning capacitance. 73, Bill W6WRT