Ian, Check and re-check T4 to be certain the windings are not interchanged. Secondly, check to see if the High Current condition occurs on all bands. If it is only on one band, the suspect the Low Pass Filter for that band.
Check the base DC voltage of Q7 during transmit. If it is other than zero volts, you should look for a solder splash somewhere that is causing Q7 to conduct heavily. These are only starters - there is no one answer to a problem such as this - there can be several causes, only to be revealed with further measurements. 73, Don W3FPR Ian Nightingale wrote: > Hello everyone, I'm sorry to trouble you with something which you've probably > had posted a thousand times. I'm very new to the hobby and am struggling to > get the K1 to work. > > Symptom: Up power on the current drain is high (as much as I would allow the > bench supply to give). > This is with just the RF board and front panel connected. Supply is a bench > supply with 12.5v and max 1 amp. > > On my first attempt to use the rig the Q7 on the finals melted. This has been > replaced but it was clearly the poor recipient of the high current and not > the cause. > > I have carefully checked each component is in the correct place and > orientation. > I've checked each solder joint. > > What I need are some places to start troubleshooting the issue. Your > assistance will be greatly appreciated. > > 73 > Ian > VP8DLJ > > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > 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 > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - http://www.avg.com > Version: 8.0.176 / Virus Database: 270.10.10/1904 - Release Date: 1/20/2009 > 7:49 AM > > _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
