Here's an update. When the radio wouldn't come on after typing the email, I was worried. I found out my cigar adapter plug from Radio Shack has a 2A fuse in it and it was blown. So that would explain why the radio wouldn't come back on! With my other power wire, I should be back in business.
73 Jay W9IUF On Fri, Jun 19, 2009 at 9:08 PM, Jay Sissom<[email protected]> wrote: > Don (& list), > > I started doing some testing tonight and have narrowed it down. > > I took out the antenna tuner and tested each band at the 2W setting, > 5W & 10W setting on the power knob. I have an external watt meter and > dummy load attached. The power didn't match exactly on all the bands > but it was fairly close (between 1.9W - 3.5W on 2W setting, 4.9 - 7W > on 5W setting and 9W - >10W on the 10W setting). My Oak Hill WM2 > meter only goes up to 10W. > > Then I re-installed the antenna tuner and started the test again. I > connected to Ant 1 and had the ANT setting set to CALS. On 28060 the > 2W setting measured 2W on the meter but gave an SWR of 1.4. At 5W it > was SWR 1.5 and at 10W it was SWR 3. The other bands were similar. > When I got to 21060 at 10W, the display said Hi Cur then showed an SWR > of 3. At 10106 with 10W, it also said Hi Cur then the radio shut down > and wouldn't come back on. I don't smell smoke or anything so I'm > assuming the fuse reset and I'll need to wait for it to cool down. > > So it is definitely a problem with the antenna tuner. I think this > has already identified a problem and I shouldn't keep going with this > test. I'll take the antenna tuner out of the lid and look at it in > more detail. But of course, any other ideas would be appreciated. > > Thanks & 73 > Jay > W9IUF > > On Fri, Jun 19, 2009 at 12:56 AM, Don Wilhelm<[email protected]> wrote: >> Jay, >> >> The real answer is "it all depends". >> Since this is a very recent K2 serial number, it may be that this problem >> has been present since it was built and was the reason that the original >> builder sold it - that is an unfortunate situation, but it must be >> considered. >> >> First, set your CAL CUR to 3.50 amps and try again. >> LoP indicates that the K2 is not developing adequate power to enable proper >> tuning for the KAT2 (it needs 2 watts to tune). >> >> Then set the K2 ATU menu to CALP and see if it will do a TUNE into a dummy >> load - first try at 5 watts power requested, then 10 watts and finally at >> maximum requested power. Does the HI-CUR message appear at all those power >> levels? Or only at maximum power? >> Next, try each band separately (doing the tests as above). Does the HI-CUR >> message appear on every band? or only some bands? >> >> After those tests, set the ATU menu to AUTO and do a "TUNE" into the dummy >> load. You should hear some relays click and after the tuner has set its L >> and C values to match the 50 ohm load, it should exit from TUNE. >> >> If all that does not produce satisfactory results, there is something wrong >> with the K2. To troubleshoot it, the first step is to remove the KAT2 and >> operate the base K2 directly into a 50 ohm non-inductive dummy load. If it >> does not produce good power output without HI Cur messages, then there is a >> problem with the base K2 - likely in the Low Pass Filters or with the T4 >> output transformer. We can help further if we have more specific >> information - what bands fail? what bands work? How much power is really >> produced? >> >> 73, >> Don W3FPR >> >> Jay Sissom wrote: >>> >>> Hello, I'm helping a friend who purchased a used K2. The K2 is a >>> serial number 6xxx with a KAT2, KSB2 and KBT2. >>> >>> When tuning with the antenna tuner into a dummy load, sometimes The >>> message "Lo P" appears on the display. It would also give the "Hi >>> Curr" message with the current limit set to 2.5A. Does it seem right >>> that the radio would draw that much current when tuning into a dummy >>> load? >>> >>> Any info on this would be appreciated. I'm finishing up the DSP, 160m >>> and KNB2 options for the radio but would like to get this fixed before >>> making changes. >>> >>> Thanks & 73 >>> Jay >>> W9IUF >>> >> > ______________________________________________________________ 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
