n0jrn wrote: > > Hey gang: > > Just a quick question. I've been reading the K2 manuals and have > some minor confusion about the operation of the K2 using a power supply. > > Can I operate the rig via a power supply with the internal > battery switch turned on??? > > Just want to be sure I'm not going to hurt something. :-) > > Manuals say I can charge the internal battery from a power supply with the > battery switch in either position. > > Just curious if I need to use caution while operating. > > Thanks and 72: > > Jerry N0JRN > >
This is stated in the KBT2 manual: "CAUTION: If you connect an external battery or a power supply of other than 14.0 V to the K2, you must disable the internal battery using the battery on/off switch. Otherwise, the external battery or low-voltage supply will charge the internal battery to an inadequate voltage, greatly reducing the internal battery’s life." Not sure whether the reason given is entirely correct, but in essence if your external supply is 14V or so you can use the K2 with the rear switch in the ON position, which is the normal charging condition. If you have a lower voltage supply you cannot - I suspect what happens there is that the internal battery tries to discharge through your external supply. You need the rear battery switch in the ON position to charge the battery, it is in series with it. The manual is referring to the front power switch - have it on if you are using the K2, off if you are just charging. Came across this last night. I am checking out a second hand K2 for a friend. The K2/100 lid was fitted, the QRP lid with the battery had been sitting idle for a while and its battery was down to 11V. Something for those of you with both lids to keep an eye on! 73 Dave G3YMC -- View this message in context: http://www.nabble.com/K2--operation-with-internal-battery-tp16375877p16379390.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ 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
