I have already posted details of the issues I have experienced trying to interface my brand new TS590SG with my KPA500.
The TS590SG has different linear amplifier switching arrangements from the TS590S and these mimic the TS990. Specifically Menu 59 #4 provides solid state grounding via pin 7 of the remote connector for switching linears. I use this method with my TS990 and it works fine. However, it does not work with the TS590SG and the KPA500 goes into the transmit state permanently once it is put into the operate position. The relay switching Menu 59 #2 works very well but it is noisy. Feedback I have received suggested that I try a diode in series with the keying line. I tried it but absolutely no difference. Another suggestion was a pull up resistor but I wasn't sure what to install and where. Clearly in its original state, the solid state switching is incompatible with the KPA500. I have now reverted to the method I used with my earlier TS590S which is a single transistor switch - a 2N3904 and a 2.2K resistor squeezed into the shell of the Din plug. The connection to the TS590SG is via Pin 7 and the setting is #1 which provides +12v on transmit which is what the TS590S also does. Suffice to say that this solution works perfectly and silence now reigns again. Hopefully either Kenwood or Elecraft will devise a simple solution to the problem in due course. Just an update which others may find of some help. Barry Simpson VK2BJ ______________________________________________________________ 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
