Larry, Look at <http://w4emf.gs35b.com> and <http://k4poz.w4zt.com> for some good ideas as well as Google GI-7B and you'll find lots of info. 73, Tony W4ZT Larry wrote: > Anyone out there constructed and operated an amplifier using GI7B tubes? > Please email me directly if you would like to share your experience. > > Thanks. > > 73, Larry >