Tube tester calibration/"bogey" tube - info sought - from you realllyyy old guys - like me

[stellavox]

Have some Hickok Tube testers to check out.

In the old days, some outfits sold tubes, typically 6L6's that provided a "calibrated"/measured Gm so you could see if (and adjust) at least one particular scale on your testers' meter - if the tester even could read that.

Back sometime in the 90's, Audio Amateur magazine ran an article on how to build a solid state version of it which, as I remember, was basically a hi-power constant current source that you could build into a tube socket and read the Gm.

Actually built a few of them (for different values) when I was into that, but the memory and mags are now long gone. SO, any subscriber that may have currently have the mags and memory be willing to look through them and and maybe post the article.

THANKS

 

[Netlist]

Have a look here:
http://6bm8.lab.free.fr/

And perhaps in the Wayback machine:
https://web.archive.org/

Edit: - https://www.diyaudio.com/community/threads/audio-amateur-issues-from-the-70s-on-line.377383/

Hugo

 

[galac]

I build the ACS of H. Holden - works fine!
https://www.worldphaco.com/uploads/Hickok_Calibration_and_the_ACS..pdf

 

[stellavox]

Thanks galac - GREAT article
Netlist,- the mentioned AA index was only for the first few years (70-71 or )2.

 

[fingers598033]

How much would the ACS design change for use in a 539B/C?