[Test-Equipment] TV-2

[Brian Goldsmith]

-----Original Message-----
From: Carl

The calibration tube came out of the audiophool world as a way to dig into 
the wallets.


Carl
KM1H



******Perhaps there is a problem with the use of the word
"calibration".Fifty or more years ago the British AVO company advised users
of their VCM and CT range of Valve Characteristic Meters to create and later
use a "Standardised Valve" on a regular (weekly) basis.This valve was not
intended as a "Calibration" device,rather it was a checking device to show
that the VCM or CT device was still reading near enough to what is was
reading last week (or the week before etc.) when the "Standardised Valve"
was created.There was no suggestion that users should use the  bogey valve
as a calibration tool.Nor would I have thought the current audiophool
fraternity have gone so far as to recommend anyone to use their sooper
dooper "calibrated" tube as a standard device that one could use to actually
calibrate their tube tester.
Words need to be used carefully in an Engineering context.

Brian G.