Hello Jim, Thanks for your reply. Yes, I understand the rationale behind. However, I don't understand why the green ground wire is so specifically linking the AC Earth Terminal to the case of RF output socket instead of other metal part of the KPA500. Could you please enlighten me on that? I have another question. I live in a multi-storey apartment. Split-type airconditioners are everywhere so that man made RFI can come to my radio / linear amplifier via the AC Earth. To avoid this, can I put RF choke between the AC Earth and the ground (i.e. metal case) of the KPA500 ?
TNX & 73, Johnny VR2XMC 從︰ Jim Brown <[email protected]> 收件人︰ [email protected] 傳送日期︰ 2011年09月5日 (週一) 2:04 AM 主題︰ Re: [Elecraft] KPA500 - ground wire between the AC earth and RF output socket On 9/4/2011 6:52 AM, Johnny Siu wrote: > On page 19 of the KPA500 kit assembly instruction, there is a green ground > wire connecting between the AC Earth terminal and the case of the RF output > socket. It is my first time to see such a ground wire design. Is there any > specific reason for doing that? This is a requirement of most electrical safety codes worldwide -- that is, the AC green wire MUST be bonded directly to the equipment enclosure. It is also good engineering practice. See the tutorial on Power and Grounding that is on my website. http://audiosystemsgroup.com/publish.htm 73, Jim Brown K9YC ______________________________________________________________ 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
