Carl WA1KPD wrote:

No ,

It uses a single 2 section tube


tube Pronunciation: \?tüb, ?tyüb\
Function:noun
Etymology:French, from Latin tubus; akin to Latin tuba trumpet
Date:1651

a hollow elongated cylinder;


electron tube

Main Entry:electron tube
Function:noun
Date:1922
an electronic device in which conduction by electrons takes place
through a vacuum or a gaseous medium within a sealed glass or metal
container and which has various uses based on the controlled flow of
electrons



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--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida