Very much On Topic: Integrated Vacuum Tubes

Tom Jennings tomj at
Thu Apr 21 11:31:08 CDT 2005

On Wed, 20 Apr 2005, William Donzelli wrote:

>> - What was/is the smallest tube? purpose?
> RCA's Nuvistor - a family often found in late 1960s TV tuners and some
> test equipments. They are almost always triodes, and are really small -
> 3/4 inch long, maybe 3/8 inch diameter, all metal. RCA made a few half
> sized Nuvistors, but never sold them.

Listers' favorite 'scopes, the Tek 5xx series, often have them in
the vertical plugins.

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