The TV-7 series military tube tester is considered excellent,
but it has a shortcoming: it is unable to test sweep tubes
which don't have an octal base.

Dan J. Nelson sold adapters for use with the TV-7.
The adapters, containing 9 pin or 12 pin compactron sockets,
are plugged in to the octal socket of the tube tester,
permitting modern TV sweep/transmitting tubes
like the 6KD6, 6LQ6 or 6HF5 to be tested.

He used octal plugs with a 9 or 12 pin compactron tube socket
wired on top as follows:

Octal Pin 9-compactron pin Octal Pin 12-compactron pin
1 1 1 1
2 2 2 2
3 3 3 3
4 4 4 4
5 5 5 5
6 6 6 10
7 8 7 11
8 9 8 12

Example:
6HF5 tube 12 to 8 adapter fil 6.3 selectors BY5-0340
bias 44 shunt N/A Range D Press 2 and hold, then 3
Min 32 New 60 top cap to plate

To perform a "Life" test, click the filament down one notch
and retest the tube. The reading should not fall off
more than 20% from the previous value.
Readings lower than this indicate a cathode which is marginal.

I don't know if Dan is still selling these, but it would be
possible to duplicate his design using a Pomona TVS-8
above-chassis octal test socket adapter.

73,
Ed Knobloch