[Vintage-Audio] 7591 replacements

[Helmut Usbeck]

On Tuesday 04 June 2002 14:22, Duane Fischer, W8DBF wrote:
> The 6L6gt/gc was mil spec, was it not? Much larger and I think the
> amplification characteristics were somewhat different.
>
> Duane W8DBF
>
>A 6L6 is a 6L6.  Don't know what you mean by mil. spec.  The GT meant glass 
tube, don't remember what the gc was, the ga has an ST type envelope, the 
original 6L6 has a metal envelope.  If a 6L6 was produced for the military it 
bears a JAN designator.  Which there probably is.  One thing to keep in mind 
is that JAN or mil spec components aren't what they're cracked up to be.  
They just meet the requirements that they wanted for a part.  Not necessarily 
"better" than it's normal production counterpart.  If a 6L6 would have done 
the job for the HI-Fi factories they would have used it instead of a 7591.  
--Helm.