[Amps] Tube Tester

[R.Measures]

On Aug 28, 2004, at 8:43 AM, Carlos Avellanet [KF4RRN] wrote:

> Can anyone tell me what tube tester would test the 8875 tubes of my
> MLA-2500, or any other ceramic tube for that matter.
>
The heater can be checked for continuity with a DMM.  A high-pot tester 
can detect the leakage current caused by any gold plating that has 
evaporated from the grid.  (loose gold meltballs can cause anode-grid 
arcing)
http://www.somis.org/Goldmeltballs.html
http://www.somis.org/EimacF.html
Loose gold meltballs inside an 8875 can sometimes be moved into the 
base of the tube by tapping on top of the anode cooler with a 4oz 
hammer.
-  Good luck, Carlos.

> Thanks,
> Carlos. KF4RRN
>
>
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>
Richard L. Measures, AG6K, 805.386.3734.  www.somis.org