Hi Ian, Jack is incorrect. It is not as critical as he implied. I operate often into high SWRs with my K3/KAT3 running through the amp in bypass mode. I'll discuss this with the team here and get back to the list with any bypass mode operating limits.
73, Eric On 4/6/2011 1:55 PM, iain macdonnell - N6ML wrote: > Well that sounds very disappointing ... can we gets specs on the > maximum reflected power that this sensor circuitry can safely handle ? > > ~iain / N6ML > > > On Wed, Apr 6, 2011 at 8:33 PM, Jack Brindle<[email protected]> wrote: >> Think twice before you do this. Subjecting the KPA500 to very high SWR >> between the transceiver and the antenna (with KPA500 in between, even if at >> standby) might damage the KPA500 circuitry. The ATU belongs _after_ the >> KPA500, not before it. >> >> Even though the amplifier section is bypassed, there is still sensor >> circuitry active in the front end of the KPA500 that may be damaged from >> high power and SWR. >> >> If you are going to do something like this, be sure to built a relay box >> that bypasses the KPA500 to protect it. >> >> Jack Brindle, W6FB >> >> >> On Apr 6, 2011, at 11:53 AM, iain macdonnell - N6ML wrote: >> >>> A feature suggestion ... may not be the best time for it, but incase >>> it could be worked into the dev-cycle somehow.... >>> >>> I'd like to be able to configure the KPA500 to automatically put >>> itself in standby on certain bands, and active on others... >>> configuration would look like the K3's band-map. >>> >>> The reason... in my remote setup, I have resonant antennas on some >>> bands, and currently use a KAT3 to make other bands (mostly WARC) >>> work. I'd like to be able to use the KPA500 on the "main" bands, but >>> still use KAT3 on the others... without having to remember to place >>> the KPA500 in standby..... at least until the KAT500 is ready :) >>> >>> ~iain / N6ML >>> ______________________________________________________________ >>> 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 >> > ______________________________________________________________ > 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 ______________________________________________________________ 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
