Man O Blues:
The first photo below is a pretty lousy snapshot of my Champ/Princeton
OT selector box. I have been working on a project that allows me to
switch between various PT, OT and supply rail components in a 5F1/5F2-A
type circuit. This project isn't finished, so I haven't taken decent
photos for web posting, but I thought I'd post a few snapshots in response
to your OT question on Ampage.
The OT in the lower left corner is a MM repro of a 1955 Tweed Princeton
OT. SE 6V6 at 8 ohms secondary. Just above it is a Hammond 125E that
was thrown on the box for size comparision. The rest of the OTs are various
flavors of Tweed Champ OTs.
The following three photos show the 125E in comparison to the FTPO-55:
