I've sent an email off to Elecraft about this and I'll be sure to update the list here with what I hear back.
Thanks for the advice guys, AB3LS On Fri, Jul 1, 2011 at 9:51 PM, Geoff Wolf AB3LS <liltechdud...@gmail.com>wrote: > I get this while in TX test mode, 5W, 100W, anything. > > And yes this squeal is only present when the 100W amp is physically > installed (KPA nor or not inst in the config menu) > > The squeal is present constantly when in TX mode. The ticking I was > describing was keying up the radio in QSK CW with some dits and dahs. > There's a pretty profound click between RX and TX. If I key the radio up in > LSB in TX test mode the squeal is present 100% of the time while in TX, no > matter if there's modulation, power going out, etc. > > I'll do my best to see if anything is arcing. > > And to an unnamed comment earlier on, I can hear this squeal at the other > end of a decent sized room, I'm not making this stuff up. > > AB3LS > >> >> On Fri, Jul 1, 2011 at 1:37 PM, Geoffrey Mackenzie-Kennedy < >> gm4...@btinternet.com> wrote: >> >>> Geoff, >>> >>> It struck me when the squeal was first mentioned that something might be >>> arcing over. If I understand correctly the squeal appears only when the >>> 100w TX amp is - which narrows the search if arcing is the cause. >>> >>> If the 12 KHz squeal is present only when a tic is generated, and if >>> arcing is the cause of the squeal, then a possible reason why this occurs is >>> that the voltage in some circuit is ramping up to a voltage every 270 msec >>> sufficient to cause something to arc over, which is heard as a tic plus >>> squeal. >>> >>> It might be worth looking inside your K3 in a dark room. >>> >>> 73, >>> Geoff >>> GM4ESD >>> >>> >>> >>> On Friday, July 01, 2011 at 6:24 AM, Geoff Wolf AB3LS wrote: >>> >>> This is a brand new K3 that I assembled about a month ago. The Serial >>>> Number >>>> is 5517. >>>> >>>> I have been using an Astron SS-25A power supply with this which is >>>> indeed a >>>> switcher. I have a battery that I'll be hooking up to it to see if this >>>> is >>>> still a problem. >>>> >>> >>> >>> On Thu, Jun 30, 2011 at 1:52 PM, W5UXH <chuck.broadw...@gmail.com> >>>>> wrote: >>>>> > I looked at the MP3 file using Goldwave. It appears to me that the >>>>> "12 >>>>> KHz" >>>>> > component is present only during the tics, not continuously. >>>>> > >>>>> > The tic period is roughly 270 msec (I have no idea what the tic is of >>>>> > course). I zoomed in to a single tic (see PDF of images at the link >>>>> > below). It appears that each tic has a very distinct pattern seen in >>>>> > the >>>>> > individual samples which I suspect is the 12 KHz energy. >>>>> >>>> >>> >>> >>> >>> >>> >> > ______________________________________________________________ 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
