I called Ameritron/MFJ and they suggested that the tubes were bad and that D16 may possibly be bad as well. Apparently that has to do with metering.
Another fellow (off-list) suggested that the GFCI blowing has to do with a leak to the ground. So, that could be a bad tube, right? Or something else... Guess I should start with tubes. Best place to get the 811A tubes still RF Parts? Thanks. -john W4PAH On Fri, Aug 9, 2013 at 12:04 PM, iain macdonnell - N6ML <[email protected]>wrote: > Definitely sounds like something is damaged in the amp. It's hard to > say what without more diagnosis than can be covered here. > > That "clicking" that you hear my be arcing. You want to STOP when you > hear that, as it will cause further damage inside the amp. > > Sounds like you need to find someone with experience who can help you > troubleshoot the amp... or try Ameritron support, as Jim suggests. > > 73, > > ~iain / N6ML > > > > On Fri, Aug 9, 2013 at 8:48 AM, John Shadle <[email protected]> > wrote: > > I should also note that sometimes the amp simply being powered on (not in > > OPER position, but just ON) has flipped my GFCI. This has happened a few > > times. > > > > So odd. And annoying, since my computer is also plugged in there--which > > requires a restart! ;-) > > > > -john W4PAH > > > > > > On Fri, Aug 9, 2013 at 11:46 AM, Jim Bennett <[email protected]> wrote: > > > >> John - > >> > >> I've got an AL-811 but this (luckily) has not happened to me. I suggest > a > >> call to Ameritron / MFJ, as it sounds like a component in the input > >> circuitry in the amp has gone flakey: able to withstand low amounts of > RF > >> but fails under higher power. I had an issue with my AL-811 not being > able > >> to load up on 80 meter CW - they were extremely helpful on the phone. > >> > >> Jim / W6JHB > >> > >> > >> On Aug 9, 2013, at 8:37 AM, John Shadle wrote: > >> > >> > Hi all, > >> > This could be tangentially related to a K3 issue, or maybe K3 experts > can > >> > give some insight here. FYI, when I am not using the amp, I can get > 100W > >> > from my K3 with no problem. Please keep reading... > >> > > >> > I have been using my AL-811 (not new, but new to me) successfully at > 500W > >> > for the past few weeks. Recently (actually, the second time this has > >> > happened), my fuses both blew and I replaced them. Since I replaced > them, > >> > behavior has not been typical. I can't get anything over 200W (most > is in > >> > the 175W range). I use a tuner after the amp, and I know that the > antenna > >> > is matched quite well to the amp, but my SWR meter on my rig (K3) is > >> > showing a high value. > >> > > >> > When I tune up at 20-25W I can get about 100W out from the amp. When I > >> move > >> > to 50-65W I get < 200W. And there is clicking. I can't tell if it's a > >> relay > >> > or if it's something else. > >> > > >> > So, the main issues are > >> > 1. High SWR from the rig to the amp (when the antenna is < 2:1 SWR to > the > >> > amp) > >> > 2. Low power from the amp to the antenna > >> > > >> > Happy to provide other information if folks have ideas on where to > look. > >> > > >> > Thanks. > >> > -john W4PAH > >> > ______________________________________________________________ > >> > 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 > ______________________________________________________________ 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
