[Amps] New 4-1000 Tubes ?

[Roger (K8RI)]

On 1/7/2013 9:32 AM, Hsu wrote:
> Why few amp manufacturer use GU-81M,?it is cheap and rugged.
>

Probably because the manufacturers data sheet de-rates the GU-81 rapidly 
as you go up in frequency.  Few home brewers OTOH run them within their 
ratings.  According to builders in Europe they run 3 KW out of a pair 
with no forced air cooling.  Apparently this is a tube that can really 
be abused and still hold up.  I have no idea as to the IM when used like 
this, but Carl might.

A pair do make a nice looking amp that is also quiet. I've been playing 
with the idea of a pair on 160 through 40 or even single band.

73 Roger (K8RI)


>
> Dr Alex Gavva   QRO Parts Site: http://www.ur4ll.net
> UR4LL
> KO70XG          mailto:ur4ll at ur4ll.net
>
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