6AH6 vs 6AU6

[L.G. Robertson]

Sorry this was delayed, Carlos, but the ListServ started enforcing an email 
rule it hadn't enforced before, and it's caused a lot of delay.

Umm...the filament current IS different, according to RCA Tube Manual 
RC-20; ...the 6AU6 is 300 ma, the 6AH6 is 450 ma.  Having said this, most 
filament transformers/windings can handle the extra 150 mils, but you might 
want to check the schematic to make sure.

Replaced the 6AU6 with a 6AH6 in my TX-1 for some more VFO stability, and 
the filament transformer's been fine for two years now.

-Lin/KJ6EF

=========================================================


At 09:29 AM 02/13/2008, you wrote:
>On 13 Feb 2008 at 3:30, carlos popelier wrote:
>
> >
> > hi,
> > can you simply plugin the 6ah6 instead of 6au6 without trouble ,
> > thanks carlos on6cn
>
>Yes. They have identical filament characteristics and exactly
>the same base connections.
>
>If you go to NJ7P's tube database on the web, and plug in
>the two tubes, you will find that one is a direct replacement
>for the other.
>
>Ken Gordon W7EKB
>
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