Most in this class of PSU use PTCs, not fuses. 73, matt W6NIA
On Sat, 22 Dec 2012 13:08:27 -0600, you wrote: >Hi all you KX3 guys, > >After Chuck, KE9UW posted the link to this little 14 volt supply on eBay, I >ordered one and said I'd report back after it came in. Got it this morning >and measured the output voltage. Mine sits right at 13.8 volts, so I >immediately hooked it up to the KX3. Full load with the KX3 key down putting >out 12 watts, the thing sits pretty much rock solid at 13.6 and key up it goes >back to 13.8 and stays there so it's got good regulation and will handle the >rig nicely. The power cord is ferrite choked right where it comes out of the >supply and the plug, even though it isn't a right angle one, fits the KX3's >power jack perfectly. > >Next, I started looking for birdies using the KX3 with a 4" pickup loop I made >with a BNC to double binding post adapter. The P/S box has an LED indicator >on it and with the loop laid on the case near the LED, I got some pretty loud >broadband noise that covered everything from 160-6 meters, but fell off and >was undetectable with the loop 4 inches from the box. I ran through each band >individually and could find no birdies attributable to this power supply in >any ham band 160-6 meters. This was confirmed by shutting the supply down >whenever I found noise or carrier type birdies and they stayed where they were. > >For less than 9 bucks this supply appears to be really pretty decent to carry >along. It has at least a 3 foot AC cord that plugs into the box and the >output cord is very close to 5 feet long so you have a lot of leeway in P/S >placement. According to the specs shown on eBay, it has both over current and >over voltage protection. I didn't short out the plug to find out if it shut >down would blow an internal fuse as the supply is sealed and I didn't want to >chance ruining it before getting a chance to take it on a trip. > >I've been using it this morning to power the KX3 on the bench and hanging out >around 14.060 looking for QRP contacts. The KX3's voltage monitor is >indicating right at 13.8 volts and .250 milliamps of current. Backlight is >on, audio set to 20 with VFO noise reduction on, RX isolation on and the 20db >preamp is on so 250 milliamps is just about right for current draw at 13.8V. > >Pretty decent lilttle supply for the money and RF wise, it's extremely quiet >compared to some I've seen. > >Jim - W0EB > > > > > > > > >> I use this one...14 volts, 4 amps. The plug on it fits the KX3 and >> the open ckt voltage is 14 vdc exactly. >> >> http://www.ebay.com/itm/KSAS065-65W-Adapter-power-supply-Output- >> 14Vdc-4A-2-1mm-plug-NEW-FREE-SHIP- >> /261135859531?pt=US_Monitor_Power_Supplies&hash=item3ccce8ff4b >> >> Chuck, KE9UW >> Lionel Trains, TCA, LCCA, LRRC >> aka Jack, BMW Motorcycles BMWMOA #224 >> >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:Elecraft@mailman.qth.net > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
