Yes, the switching time in the amplifier is too slow, hence you need to consider sequencing the amp keying so that it keys first then the KX3. Sounds like the amp has a relay vs solid state switching.
Mel, K6KBE From: EA2BD via Elecraft <elecraft@mailman.qth.net> To: elecraft@mailman.qth.net Sent: Thursday, September 29, 2016 9:06 AM Subject: [Elecraft] KX3 temporary high SWR on PTT with external Amplifier Hello, I want to check if anyone experiences the same behaviour when connecting the KX3 to an external amplifier. - I receintly added an external amplifier to my KX3. - I connected the PTT cable to the ACC2 port and to the amplifier. - I set the Menu ACC2 on the KX3 to Active low, as specified. - I verified if the cable works and it closes contact all right every time I key down. The TROUBLE is: Everytime I send a dit (CW) or start talking (Voice) the SWR indicator on the KX3 shows full reading (Hi SWR!) just briefly and it quickly relaxes down to normal reading (SWR 1:1) during the rest of transmission. I believe there should be any kind of delay between the TX on the KX3 and the TX on the ampli, that causes the momentarily Hi SWR reading... But this is extrange because the PTT cable is in! Does anyone have experienced similar phaenomena? Any idea to overcome this? Do you consider there will be a real overload on the finals due to this small transient time? I drive with 2 watt out from the KX3 to get around 90W out from my Amplifier. Wait for your feedback, many thanks! 73 de Ignacio EA2BD -- View this message in context: http://elecraft.365791.n2.nabble.com/KX3-temporary-high-SWR-on-PTT-with-external-Amplifier-tp7622916.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to farrerfo...@yahoo.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com