[Test-Equipment] Eico 667 Is there a way to check performance?

[Ron Youvan]

Ray W4BYG LaRue:

> I have an Eico 667 that hasn't been used in a number of years.  I
> brought it back up very slowly and it appears the filters are OK.  Power
> supply ripple seems nominal.

> However I recently had cause to check a 6AQ5.  It barely moved the
> "merit" needle.  I pulled another
> (used) one and it checked the same.  Altogether I checked 7 or 8 6AQ5's
> (all pulls).  They all barely moved the needle in the same way.   I find
> it hard to believe they were all that bad.

> Other than buying a new 6AQ5, which may not be needed should the tube
> checker be bad, does anyone know of a way to check the performance of
> the 667?

   I think step one is to test various other tubes 12BY7, 6CL6, 6146 or
1624/1625, whatever you can dig up.  If some of them test good,
   I think step two is to find someone else locally that can test your 6AQ5s.
-- 
    Ron KA4INM - I'm proud to be Chuck's pop!