I found while assembling my K3 that the crimp connectors that go on the circuit breaker were not crimped well. They pulled out very easily. I replaced them. I go from 14.3 to 13.7 on the front panel voltmeter display at full power out. I see no worse than -31db 3rd imd on my old HP analyzer. It hasn't been cal'd in a while but my other rigs are about the same except my old Ts-830. Of course it's better. I love that rig. But I can't seem to get the cat interface to work. Randy K8RDD
Julian, G4ILO wrote: > > > Bill W4ZV wrote: >> >> >> Which reminds me...I set my power supply to deliver 14.5V at the input to >> my K3 terminals under load. Although the power supply specification >> says... >> >> "Supply Voltage/current: 13.8 V nominal during TX. (11 V min, 15 V max). >> 17-22 Amps typical in TX (100W). 0.9A minimum RX." >> >> What is the voltage off-load when it is set like that? >> >> ****It will depend on: >> 1. Your specific power supply regulation. >> 2. The resistance of the connecting cable (i.e. size and length). >> >> ***I believe my drop is ~0.3V from 14.8 to 14.5, no-load to load. >> >> >> >>> >>> ...I would never intentionally run mine at the lower end of that range. >>> If you have any concerns about overshoot when turning on your power >>> supply, always turn the PS on a few seconds before the K3. >>> >> >> But the K3 power switch is a "soft" switch isn't it, so some electronics >> are still connected to the supply even when the switch is off? >> >> ***Since the applied voltage is never above the 15.0 spec, I don't worry >> about it. If you're paranoid, you can disconnect the APP connector each >> time; or if you're concerned about wearing out the APP connectors, >> disconnect it at the power supply each time you turn the PS on. >> >> >> >>> I tend to leave my PS on continuously so overshoot is never an issue. >>> >> >> ***Mine consumes 30VA even when no load is present, so for the sake of >> the environment everything here now gets switched off at the mains when >> not in use. >> >> ***My shack is unheated in the winter, so the idle power is heating my >> shack. :-) >> >> The supply cable for the K3 certainly uses less copper than the ones >> supplied with JA radios. The PowerPole connectors seem a bit wimpy to me >> as well. >> >> ***Nobody is forcing you to use the supplied cable. A battery jumper >> cable should work nicely if you can figure out the connections. If >> everyone in the UK is so paranoid, you can probably start a thriving >> business making special connecting cables ;-) >> > > 73, Bill > > -- View this message in context: http://n2.nabble.com/New-Eham.net-K3-review-by-QRPNEW-tp2218086p2225782.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
