[K2] [KAT2]
Locked
 
|
Hello group!
I'm putting together my KAT2 and having trouble with the Bridge Null Adjustment (pg 16). When I first went through it, it worked fine until step four on page 17, where I got well over the specified 3 or 4 volts. So I pulled it apart, checked everything, and reflowed T1. Now I'm trying to adjust C55 again, but I can't seem to get it to go to the ATU when I press TUNE. It flashes ATU briefly, then says Hi Cur, then goes to P 4.3 or so. Any suggestions? 73, Kristina KE7LUC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
|
|
Kristina Wright wrote:
> So I pulled it apart, checked everything, and reflowed T1. Now I'm > trying to adjust C55 again, but I can't seem to get it to go to the ATU > when I press TUNE. It flashes ATU briefly, then says Hi Cur, then goes > to P 4.3 or so. Some simple things to check are that you have a proper 50-ohm termination on the antenna 1 connection of the KAT2. Check that you haven't accidentally selected antenna 2 while the dummy load is on antenna 1. You can work around the high current warning by reducing power to about 1 watt or so until you get the adjustment close to where it needs to be. -- Cheers! Kevin. http://www.ve3syb.ca/ |"What are we going to do today, Borg?" Owner of Elecraft K2 #2172 |"Same thing we always do, Pinkutus: | Try to assimilate the world!" #include <disclaimer/favourite> | -Pinkutus & the Borg _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
|
|
Ok, I wiggled some wires and now when I press TUNE it goes to the ATU.
But I still have the problem of only about 0.02 V at TP B. I've checked both boards (a whole bunch of times) for shorts or unsoldered pins and haven't found any. Any ideas of where to look next? 73, Kristina KE7LUC Kristina Wright wrote: >> I'm putting together my KAT2 and having trouble with the Bridge Null >> Adjustment (pg 16). When I first went through it, it worked fine >> until >> step four on page 17, where I got well under the specified 3 or 4 >> volts. So I pulled it apart, checked everything, and reflowed T1. Now >> I'm trying to adjust C55 again, but I can't seem to get it to go to >> the ATU when I press TUNE. It flashes ATU briefly, then says Hi Cur, >> then goes to P 4.3 or so. >> Any suggestions? Tom Hammond wrote: > 1) RE-check your soldering... especially for possibly shorted > connections > (which do sometimes occur as a result of reflowing previously > soldered > joints). > > 2) Ensure that you have the KAT2 re-plugged correctly and that ALL > pins of > the connectors are properly plugged in. > > 3) Ensure that the 10-pin cable plug is properly plugged into the > connector > on the CTRL PCB. > > Can't be much wrong, but sometimes it doesn't take 'much' to make > things > LOOK a lot worse that they really are. Kevin Cozens wrote: > Some simple things to check are that you have a proper 50-ohm > termination on the antenna 1 connection of the KAT2. Check that you > haven't accidentally selected antenna 2 while the dummy load is on > antenna 1. You can work around the high current warning by reducing > power to about 1 watt or so until you get the adjustment close to > where it needs to be. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
|
|
Kristina,
Are you reading too fast and overlooking a whole sentence in the manual? The 'point B' is only a visual reference. You should actually measure at pin 1 of U4. 73, Don W3FPR Kristina Wright wrote: > Ok, I wiggled some wires and now when I press TUNE it goes to the ATU. > But I still have the problem of only about 0.02 V at TP B. I've > checked both boards (a whole bunch of times) for shorts or unsoldered > pins and haven't found any. Any ideas of where to look next? > > 73, > Kristina KE7LUC > > > Kristina Wright wrote: >>> I'm putting together my KAT2 and having trouble with the Bridge Null >>> Adjustment (pg 16). When I first went through it, it worked fine until >>> step four on page 17, where I got well under the specified 3 or 4 >>> volts. So I pulled it apart, checked everything, and reflowed T1. Now >>> I'm trying to adjust C55 again, but I can't seem to get it to go to >>> the ATU when I press TUNE. It flashes ATU briefly, then says Hi Cur, >>> then goes to P 4.3 or so. >>> Any suggestions? > > Tom Hammond wrote: >> 1) RE-check your soldering... especially for possibly shorted >> connections >> (which do sometimes occur as a result of reflowing previously soldered >> joints). >> >> 2) Ensure that you have the KAT2 re-plugged correctly and that ALL >> pins of >> the connectors are properly plugged in. >> >> 3) Ensure that the 10-pin cable plug is properly plugged into the >> connector >> on the CTRL PCB. >> >> Can't be much wrong, but sometimes it doesn't take 'much' to make things >> LOOK a lot worse that they really are. > > Kevin Cozens wrote: >> Some simple things to check are that you have a proper 50-ohm >> termination on the antenna 1 connection of the KAT2. Check that you >> haven't accidentally selected antenna 2 while the dummy load is on >> antenna 1. You can work around the high current warning by reducing >> power to about 1 watt or so until you get the adjustment close to >> where it needs to be. > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
«
Return to Elecraft
|
1 view|%1 views
| Free forum by Nabble | Edit this page |