>Has anyone used the Svetlana 4CX800 in grounded grid (on HF) by tying the
>screen and control grid together? Is it ok to do with this tube? There is
>and
>inexpensive and plentiful source for these tubes on E-pay and I am giving
>some thought to buying a few of these tubes.
>Thanks,
>Jim
>
The 4cx800 is a Class AB1 tetrode that has a 2w max diss, grid. The grid
normal runs 0w diss. In grounded-grid, there is substantial grid
current. Typical g-g service tubes have c. 20w grids.
- Running AB1 is easier than building a g-g tuned input circuit for each
band that is going to be affected by the length of coax to, and the
Chebyshev filter design in, the radio.
cheers, Jim.
- R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.
end
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