Have obtained some NOS tubes and some of them are marked with a CV number, example, CV 5220. I would like to know what type of tube this is. Seem to recall something about the CV numbering as being a military or goverment marking for normal tubes. Does anyone know of a website that lists these CV numbers with the normal civilian number? Any help appreciated - thanks.

:Have obtained some NOS tubes and some of them are marked with a CV number, example, CV 5220. I would like to know what type of tube this is. Seem to recall something about the CV numbering as being a military or goverment marking for normal tubes. Does anyone know of a website that lists these CV numbers with the normal civilian number? Any help appreciated - thanks.

Hi Des,
You can look for subs on this site:
http://www.tubecollector.org/list.php
Carl T

::Have obtained some NOS tubes and some of them are marked with a CV number, example, CV 5220. I would like to know what type of tube this is. Seem to recall something about the CV numbering as being a military or goverment marking for normal tubes. Does anyone know of a website that lists these CV numbers with the normal civilian number? Any help appreciated - thanks.
:
:Hi Des,
:You can look for subs and specifications on this site for "Commercial Valves:
:http://www.tubecollector.org/list.php

Another site to look at:
http://www.nzvrs.pl.net/aaa/cv_register.htm
:Carl T

Hi

Here is another one:

http://tdsl.duncanamps.com/tubesearch.php

CV5220 is same as KT88.

Norm

:::Have obtained some NOS tubes and some of them are marked with a CV number, example, CV 5220. I would like to know what type of tube this is. Seem to recall something about the CV numbering as being a military or goverment marking for normal tubes. Does anyone know of a website that lists these CV numbers with the normal civilian number? Any help appreciated - thanks.
::
::Hi Des,
::You can look for subs and specifications on this site for "Commercial Valves:
::http://www.tubecollector.org/list.php
:
:Another site to look at:
:http://www.nzvrs.pl.net/aaa/cv_register.htm
::Carl T