[Elecraft] K3/100 Voltage Drop when transmitting

[Don Sayler]

I had a similar problem. I checked the key-down voltage at my power supply, and was surprised to see that it was low (I don't recall the exact voltage).I'm using an Astron linear power supply. I replaced the voltage regulator in the power supply, and the problem was solved.73,Don Sayler W7OXRSent via my Mobile
-------- Original message --------From: mjpilgrim <mpilgrim at bellsouth.net> Date: 2/25/19  10:55 AM  (GMT-08:00) To: elecraft at mailman.qth.net Subject: [Elecraft] K3/100  Voltage Drop when transmitting At first i suspected my Solar power system which was installed a year ago,but now I  plugged my K3 S/N 7317 directly into my 25A switching DC powersupply, and when key down, 100W in CW, on the internal K3 Power Meter i seea voltage drop from 13.6 to 12.0VDC.  My power cord is a 6',  10ga strandedcopper wire pair with Andersen Power Pole connectors.  I have tried threeseparate power cords, all 10ga with power pole connectors, but with nochange in the voltage drop scenario.  If anyone has suggestions of where theproblem  lies, I am all ears. Obviously, when operating SSB the drop ispresent but not as severe.  What am i dealing with?  Better yet, how do ifix it?  Thanks in advance.Cheers,Mike, K5MP--Sent from: http://elecraft.365791.n2.nabble.com/______________________________________________________________Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:Elecraft at mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.html