*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 <[email protected]>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 <[email protected]> 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 > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[email protected] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > -- Gary VK4FD - Motorhome Mobile Elecraft Equipment K3 #679, KPA-500 #018 Living the dream!!! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
