Jamie, > OK, so now I know something's afoot inside my K3. What do I need to > do ? Someone mentioned clipping an offending component while waiting > on a replacement part. What part do I need to order ?
e-mail [email protected] ... they can give you the information to bypass the 8 MHz trap (unfortunately I failed to keep the info) until you can order a replacement/exchange KAT3. The trap is L10/C10 on the KAT3 board. One other thing to try ... swap to ANT 2. It's possible that SA1 is breaking down under power although I would expect that to be an issue on all bands. 73, ... Joe, W4TV On 7/1/2011 2:54 PM, James C. Hall, MD wrote: > OK, more data points. Since I was getting good SWR at the mW level with the > analyzer, I cranked the power down to 1 watt and pressed tune. Got good SWR > and 1 watt out. OK gently walked the power up and tried again. At 1.9 watts, > I would get good SWR for a second and then it indicated 8.9:1 SWR. > > I went out and bypassed the ICE suppressor and that made no difference. The > only other radio I have that operates on 6M is my IC-706 - um, mobile. So I > jerked it out of the truck and rigged it up in the shack and ran an SWR > graph - less than 1.3:1 all the way. OK, so I hear FG5GP on 50.130 MHz and > give him a call with 100 watts - no problem. He was 57 on my meter and he > gave me a 57 report back. > > OK, so now I know something's afoot inside my K3. What do I need to do ? > Someone mentioned clipping an offending component while waiting on a > replacement part. What part do I need to order ? > > 73 and thanks for all the help ! > > Jamie, WB4YDL > > -----Original Message----- > From: Joe Subich, W4TV [mailto:[email protected]] > Sent: Friday, July 01, 2011 1:02 PM > To: James C. Hall, MD; Elecraft Reflector > Subject: Re: [Elecraft] K3 6M problem > > > Normally I would tell you to connect your dummy load, enable the KAT3, > tune into the dummy load then disable the tuner and try the antenna. > However, I know there is an issue with the KAT3 finding the right match > on 6 meters. > > Since you're seeing a high SWR after field day, inspect the KAT3 > carefully to see if the 8 MHz trap has been damaged (extended TX into > a less than ideal load). Damage to that trap will be most evident on > six. > > 73, > > ... Joe, W4TV > > > On 7/1/2011 1:25 PM, James C. Hall, MD wrote: >> The radio was used at the digital station, so RTTY was the active mode. 6M >> was not used on this radio. >> >> Ron, yes, you are quite correct about the ATU - it does work on 6M. :) I >> just never had to use it. Just for grins I switched in the ATU and could >> only get 3.9:1 SWR. Taking the cable off the ANT connector and putting it > on >> my MFJ analyzer, it shows 1.3:1. >> >> Sigh ... Worked perfectly on 6M prior to taking it to FD. >> >> 73, Jamie >> WB4YDL >> >> -----Original Message----- >> From: Joe Subich, W4TV [mailto:[email protected]] >> Sent: Friday, July 01, 2011 11:51 AM >> To: James C. Hall, MD; Elecraft Reflector >> Subject: Re: [Elecraft] K3 6M problem >> >> >> >> Jamie, >> >> Did the antenna selection on the K3 get toggled to ANT 1 for >> six meters? Remember the ATN1/ANT2 is stored on a per band >> basis. If the rig was used in 6 with ANT 1 at field day, it's >> likely that ANT 1 is still selected! >> >> 73, >> >> ... Joe, W4TV >> >> >> On 7/1/2011 12:06 PM, James C. Hall, MD wrote: >>> Hello: >>> >>> >>> >>> After returning my K3 back to the shack after Field Day, I have > discovered >>> that 6M no longer transmits with low SWR. I checked all the rear panel >>> connections as it is interfaced through a microham MK2R+ and > Stationmaster >>> band decoder. However, I have the 6M antenna coax directly going to >> Antenna >>> 2 on the radio. Using an antenna analyzer, the antenna shows excellent >> SWR. >>> Using a dummy load to each antenna port, all bands shows good SWR except >> 6M. >>> I updated the firmware and cycled the power but I still have the HI SWR >>> showing with 6M. >>> >>> >>> >>> I do have the PR6 pre-amp in line, but the problem is not receive. >>> >>> >>> >>> I'm stumped. Any help appreciated. >>> >>> >>> >>> 73, Jamie >>> >>> WB4YDL >>> >>> >> > ______________________________________________________________ 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
