Take a look at the projects by W4EMF <http://w4emf.gs35b.com> and K4POZ,
Treat the GI-7B like any other old tube. It's a very stable little tube
that will give you 55 to 60% efficiency in Grounded Grid with tuned
input. I am currently doing a six meter conversion and retrofit of an
old butchered SB-200 with a single GI-7B.
Good luck with your project!
73, Tony W4ZT
Mike(W5UC) & Kathy(K5MWH) wrote:
> Good Evening All:
> I found this group while searching for information on the Gi-7b Russian
> tubes. So, here is the question. Has anyone used the Gi-7b in an amplifier?
> I am in the process of building a new amp for 6 meters using a pair of
> these tubes. What kind of output did you get, and at what efficiency? I have
> seen data saying anywhere between 700 & 1200 watts for a pair at 6 meters,
> and at efficiencies from 57% to 68.5%
> Did you burn the tubes in before applying HV and drive? What was your burn
> in process?
> Any input would be greatly appreciated.
> Mike, W5UC
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