[R-390] TV-10 tube testing questions

[frankshughes at aim.com]

Hi,
I received my updated, calibrated TV-10 from Roger (alltubetester), and started learning how to use it on the pile'o
spare tubes I have collected for my R-390A. 

As I understand it, the TV-10 is very similar to the TV-7, but the TV-10 displays Mutual Conductance in Micromhos values directly.

I have read that no two testers will provide the same value for the same tube, so I understand that this is not an exact science.

But as I have no idea what to expect, I am asking for advice as to if the values that I found from some preliminary testing are reasonable or not.
For all I know Roger may have put a small ravenous Hamster inside the TV-10, and somehow attached it to the meter movement. 

I set up the TV-10 as per the manual, and also followed Rogers "how to test" instructions.

I tested four 6DC6 NOS JAN 12/86. 
The TV-10 chart says the minimum value is 2840. The tubes tested 5000, 5000, 5500, 5800.

Tested six JAN 5749,? minimum=2070, Test values = 3300, 3900, 3900, 3900, 4050, 4200

So if these are reasonable, I guess the lesson for me is that there is quite a difference between new tubes and aged tubes. ?

I also noted that there are some tube types that the TV-10 does not have on the roll chart. ?
(these have the "W" and/or "A" suffix)

I would like to understand the technical difference (if any) for these tubes, there must be a good reason that their number
differs, but I don't know if it makes any difference as far as the testing. 

Here is what I think is in my R-390A:

OA2WA? (Not on the TV-10 chart)
5654W? (The TV-10 chart shows a 5654)
5749?? matches TV-10 chart exactly
5814A? (The TV-10 chart shows a 5814)
5963?? matches TV-10 chart exactly
6AK5W? The TV-10 chart shows a 6AK5
6AK6?? ?matches TV-10 chart exactly
6CB6A ?? ?The TV-10 chart shows a 6CB6
6C4???? matches TV-10 chart exactly
6DC6?? ?matches TV-10 chart exactly
12BA6?? ?matches TV-10 chart exactly
26Z5W?? ?matches TV-10 chart exactly

Thanks,
Frank