I am using a Jetstream JTPS28M and I am happy. I have a few birdies, but I am not sure which come from the switching supply and which come from the computer. They don't give me enough trouble that I have investigated. The JTPS28M is only $99.95 so I am not sure it is worth trouble shooting and changing caps. The rule of thumb for electrolytic capacitors that that I learned year ago was to change them after 7 years. I suspect that modern caps are better than the ones we had in 1960, but that still may be your problem. There are plenty of places to buy caps on the internet and I don't know any place that it is more convenient to buy local. I live in the Houston area and still need to buy such things by internet. Fry's is only 5 miles away but if they have the part in stock they will have one when I need four. EPO will have four that are old stock or surplus that may not be any better than the one removed. So I buy from Allied or one of the other on line vendors, wait a week and save the gas.
Willis 'Cookie' Cooke K5EWJ --- On Mon, 5/11/09, Merv Schweigert <k...@flex.com> wrote: > From: Merv Schweigert <k...@flex.com> > Subject: [Elecraft] K3 Power supply > To: > Cc: elecraft@mailman.qth.net > Date: Monday, May 11, 2009, 12:19 PM > The past couple of days I have noticed the noise level on > the K3 has > gone up a couple of S units and on 20 meters and there were > tunable > hash signals. I started to try and find the problem and > using another > receiver I find the Astron SS-30 is generating all sorts of > noise. > I have used this supply for some time and have not noticed > the noise > before. I drug out an old backup supply MFJ-4245 and > behold it > also has a lot of tunable hash signals on 20 meters. > Wonder what supplies are being used with the K3? Or if > anyone has > had luck on cleaning up the switcher supplies like the > Astron? > I suspect it could be due to age and caps going bad, the > supply has > been in use for 8 years. > There are no locally available parts so before I try and > recap and order > ferrites etc like to know what works if anything. > Thanks Merv KH7C > ______________________________________________________________ > 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 ______________________________________________________________ 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
