[TenTec] Hercules II fan noise

[Steve Hunt]

Mike,

Thanks for the input - I think I remember reading somewhere that the 
original Hercules was noisy.

However, Bob Good advises that his Hercules II is quiet, and I just 
found a 1990 CQ report where the reviewer describes it as "whisper 
quiet". I'm certainly hearing something more than a whisper!

I don't think the noise is being amplified by the surface it's on - I 
just lifted it up in my hands and nothing changed.

I notice there's a speed control adjustment on the bias board, so I've 
asked TT Service how that should be set.

73,
Steve G3TXQ

Mike Hyder --N4NT-- wrote:
> Hi, Steve--
>
> Not the same amp but its namesake:
>
> I had the original Hercules 444.  Its fan increased speed with temperature. 
> At full tilt it sounded rather like a 747 in full engine reverse.  Putting 
> it on a carpet sample helped.  Putting it in another ham's shack helped even 
> more.
>
> Mike
>
>   
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