[Elecraft] KAT500/KPA500 Positioning

[Gary Gregory]

*Eric,

Well that answered my concerns regarding placing under the K3/KPA-500
nicely.

Thanks a bunch.

Gary
*
On 1 April 2012 04:29, Eric Swartz WA6HHQ - Elecraft <eric at elecraft.com>wrote:

> There should be no interaction issues between the KAT500 and the KPA500
> when the KAT is under the amp. We also beefed up the KAT500 cabinet to
> handle the weight of the KPA500.
>
> Also, placing it on top of the amp does not raise amp PA transistor temp
> significantly for most casual duty cycle use, typically raising it a few
> degrees. In some cases it will cause the amp's fan to move to a higher
> speed during TX.
>
> For higher intensity operation, with the ATU on top of the amp, key down
> 100% for several minutes the PA temp will raise 5-9 degrees above what its
> normal operating temp would be without the ATU on top. The fan will also
> operate at a higher speed. In our testing at normal room temps this was
> still well below the amp's max temp fault trigger point. But if you plan on
> RTTY or other high duty cycle modes with a lot of continuous RX time,
> especialy under higher ambient temp conditions, we recommend placing the
> KAT500 to the side or under the amp.
>
> Also, the amp protects itself from over temp situations with its soft and
> hard fault triggers. So feel free to try it out on top to see how it works
> under your typical operating conditions.
>
> 73,
> Eric
>
> www.elecraft.com
> _..._
>
>
>
> On Mar 31, 2012, at 9:25 AM, Jim Bennett <w6jhb at mac.com> wrote:
>
> > Good to know, as I'm betting that the KAT500 is not going to weigh
> nearly as much as the KPA500! Placing it on top of the amp, with three fat
> RG-8 cables hanging out the back of it would (IMHO) tend to make the tuner
> susceptible to tipping backwards. Locating it under the K3 is not an option
> at my location, so an under-amp placement would be nice.
> >
> > Wayne - any problem with interaction between the two if the tuner is
> placed under the amp?
> >
> > Jim / W6JHB
> >
> >
> > On   Saturday, Mar 31, 2012, at  Saturday, 9:06 AM, Phil & Debbie Salas
> wrote:
> >
> >> The KPA500 draws in air from the top, and exhausts it out the back.  So
> >> placing the KAT500 under the amplifier shouldn't affect KPA500 air flow.
> >>
> >> Phil - AD5X
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-- 
Gary
VK4FD - Motorhome Mobile
Elecraft Equipment
K3 #679, KPA-500 #018
Living the dream!!!