Good Day Everyone,
After reading some of the discussions regarding power supplies, I've recently bought a Powerwerx 30 amp switching power supply. I knew that this was way more than I needed for present needs, but I didn't want to under-buy and have to buy up later. Anyway, the unit supplies 4-5 watts indicated by the ATU, and I have an SWR of 1.0 to about 1.9 using the Elecraft rescommended antennas (This my only rig, and I use it from my desk). Here's the problem: Independent of band or frequency selected, I get a noise that sounds something like a small jet taking off or the whoosh that the dishwasher makes on wash cycle--WWWUUUSSSHHHHHhhhhh.... (Well, sort of like that.) The sound starts low and finishes high and then goes away briefly and then recurs fairly regularly. The noise isn't there when I use battery mode. Am I doing something wrong here, or is this the nature of this type of power supply? Tnx es 73 John KK4BOB -- John Flynn Tallahassee, Florida USA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
-----Original Message----- From: [hidden email] [mailto:[hidden email]] On Behalf Of John Flynn Sent: Tuesday, November 15, 2011 10:02 AM Your sound is not normal. Can you localize the sound? Is it coming from the fan? Is the Powerwerx set to 120 VAC? 73 Fred To: [hidden email] Subject: [Elecraft] Noise with KX1 and Powerwerx PS Good Day Everyone, After reading some of the discussions regarding power supplies, I've recently bought a Powerwerx 30 amp switching power supply. I knew that this was way more than I needed for present needs, but I didn't want to under-buy and have to buy up later. Anyway, the unit supplies 4-5 watts indicated by the ATU, and I have an SWR of 1.0 to about 1.9 using the Elecraft rescommended antennas (This my only rig, and I use it from my desk). Here's the problem: Independent of band or frequency selected, I get a noise that sounds something like a small jet taking off or the whoosh that the dishwasher makes on wash cycle--WWWUUUSSSHHHHHhhhhh.... (Well, sort of like that.) The sound starts low and finishes high and then goes away briefly and then recurs fairly regularly. The noise isn't there when I use battery mode. Am I doing something wrong here, or is this the nature of this type of power supply? Tnx es 73 John KK4BOB -- John Flynn Tallahassee, Florida USA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] 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:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Free forum by Nabble | Edit this page |