I am completely unfamiliar with the 4K Ultra but I'll venture to say
their recommendation may have to do with dimensions and mating with
original holes and voltage/current demand.
Probably any recommendation is based on the assumption you want a
drop-in replacement. They may have had to compromise on cooling for
that.
Or, they could have simply made a mistake. : ) So, obviously, if
you can find a blower that meets the original specs, and you can
install it, then do it.
73
Rob
K5UJ
On Thu, Mar 1, 2012 at 5:49 PM, edmund weber <edmund@dellafattoria.com> wrote:
> Greetings to the list,
> The exact replacement for this blower is no longer offered by Henry Radio.
> They
> are recommending a Dayton 6FHX3 from Grainger as a near match, however this
> blower gives less than half the cfm, (140) at twice the rpm, (3000). Am I
> wrong in
> thinking this would give the tube less cooling and more noise? Thanks for
> any advice
> on this.
> Edmund
> KA6ZMI
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