[GreenKeys] Radio valve/tube CG 502A

[tony.podrasky]

Hi drlegendre; that's it!

regards,
K2EAA - TONY
NNNN
ZCZC


On 03/22/2017 07:16 PM, drlegendre . wrote:
> The plane was a MiG-25 and it was landed in Hokkaido, Japan in 1976 by a
> defecting Soviet pilot. It was not shot down, far as I know.
>
> It was found to use the 6C33C tube in a primary voltage regulator. The
> 6C33C dual-triode is like a very hefty version of the 6AS7G / 6080WA or
> the 6336A - high Gm, exceptionally low rp (like, 60R) and consequently
> very low mu. They are designed to handle serious power, and can run very
> hot - and can be extremely hard on the socket, which requires regular
> replacement. Some form of air cooling is a requirement, which isn't so
> hard to come across in an aircraft.
>
> This page seems to have good info on it: http://www.tubetvr.com/favtube.html
>
> On Wed, Mar 22, 2017 at 4:40 PM, Dave Horsfall <dave at horsfall.org
> <mailto:dave at horsfall.org>> wrote:
>
>     On Wed, 22 Mar 2017, tony.podrasky wrote:
>
>     > Reminds me of a story...
>     >
>     > Quite a few years ago there was a big ridicule against the USSR -
>     > because they were still using tube radios.
>
>     I believe it was a MiG that got shot down, and its hollow-state
>     stuff was
>     seen.
>
>     My, how primitive!
>
>     And then somebody realised that they would survive an EMP blast...
>
>     --
>     Dave Horsfall DTM (VK2KFU)  "Those who don't understand security
>     will suffer."
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