Hi Rick,
-
I don't have a single reason that you might be
looking for. It's probably a combination of the
tube geometry, anode and internal C values
and it's HF/VHF gain.
I've been able to get 813's to oscillate easy
enough, but I've never had a known parasitic
problem in any of my previous 813 amplifier
projects.
-
They also take a significant amount of abuse
that would poof less hardy non carbon anode
valves.
-
cheers
skipp
-
"Rick Cole VK3YM" <vk3ym@iprimus.com.au>
Skip.. I am very interested in your remark about
the 813 tube...Can you enlighten me...very briefly
..as to the reason for lack of parasitics..what
makes the 813 so stable as compared to
other/similar tubes...
Rick VK3YM
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