Very much On Topic: Integrated Vacuum Tubes

Dave Brown tractorb at
Thu Apr 21 03:24:05 CDT 2005

----- Original Message ----- 
From: "William Donzelli" <aw288 at>
To: "Wai-Sun Chia" <waisun.chia at>; "General Discussion: 
On-Topic and Off-Topic Posts" <cctalk at>
Sent: Thursday, April 21, 2005 3:47 PM
Subject: Re: Very much On Topic: Integrated Vacuum Tubes


>> - 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.

Some mil gear (eg PRC-41) has very small ceramic tubes -not sure if 
they are quite as small as the Nuvistor but they must be close- 
likewise some hearing aid amp tubes were pertty damn small as well.

DaveB, NZ 

No virus found in this outgoing message.
Checked by AVG Anti-Virus.
Version: 7.0.308 / Virus Database: 266.9.19 - Release Date: 20/04/2005

More information about the cctalk mailing list