The Germanium-only circlotrons. Powerful, wideband.

Circlotron-S
 

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If there are europian analogs 1T813, then it is possible.
On the other hand, the 1T813 seems to be made not quite in the Asian country.
She's a bit European. )))

The GT806 is slightly weaker. The analogues are given by reference.
But whether they really are appropriate, you need to look.
Транзистор ГТ806 — DataSheet
 
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