Udo, I just tested a KXV3B fresh off the production line. Results: 1.0 mW TX GAIN cal completed without error, and the XVTR IN jack is within half a dB of both the RX ANT IN jack and the main antenna jacks (ANT1/ANT2).
I suspect that your KXV3B was damaged in transit, etc., but we won't know until we can get a look at it. Meanwhile, please contact the distributor so we can arrange for an immediate replacement. Our apologies for the inconvenience. 73, Wayne N6KR On Jun 19, 2015, at 1:46 PM, Udo Langenohl - DK5YA <dk...@dk5ya.de> wrote: > Just got my KXV3-B as a replacement of the former KXV3-A. Installing complete > after 1 hour. Removing the back panel makes things much easier btw. But > there's an issue. The 1 mW calibration fails. Thats what the Elecraft Utility > says: > > Elecraft K3 Utility Revision 1.13.5.9 > OS Version 6.1 Build 7601 Windows 7/Windows Server 2008 R2 > K3 MCU revision 05.26. RS-232 speed 38400 bit/s. > Starting 1 milliwatt calibration > Calibrating at 1.900 MHz > Calibration power settled at " 1.800.00;" > Elapsed time: 5 seconds > Tx Gain calibration failed because transmit power did not reach the expected > value > 1 milliwatt calibration failed > > Wait, there's more to come. I made a replacement because my guess was: KXV3-A > has a damage. > I use my K3 mostly on VHF with transverters, especially on 144 MHz EME. I'm > running a Xpol configuration with 4 antennas on 144 EME with two identical > transverters, both in phase and locked by a common external LO with 10 MHz > GPS control for Hpol and Vpol. > HPol RX is fed to the KXV3 XVTR In/Out while Vpol is fed to the AUX RF input. > I can listen to both planes simultaneously using diversity receive. > But something very strange happens when I compare signals on both planes. I > have a 144 MHz beacon nearby (just 25 miles away). That beacon is running 8 W > on a Hpol antenna. On my Hpol (main RX via KXV3) input this beacon comes up > to S9+35 dB while on Vpol (second RX via AUX) it's endstop (S9 +60dB). The > beacon is in the line of sight, there's a lot of RF on my location from this > beacon. > It's definetely not from the transverters or from mismatched antennas because > when I change inputs and connect the Hpol transverter output to the AUX RF > it's suddenly S9 +60 dB too. Both main and sub RX are exactly in the same > configuration, filters, bandwidth, NB Off, etc.. > I checked S/N on KXVR3-A (old board) and AUX few days ago with my HP8664A > signal generator. > On 28.200 (TVTR IF) I measured: > Top values: > KXV3-A TVTR IN: -10dBm = S9+25dB > AUX IN: -10dBm = S9+60dB (!) > KXV3-A TVTR IN: +3dBm = S9+60dB > Huge difference of 13dBm > Low values: > KXV3-A TVTR IN: -134dBm = signal detectable > KXV3-A TVTR IN: -140dBm = none > AUX IN: -140dBm = signal detectable > Again a difference of at least 6dB or more. > > Now, with the new KXV3-B it's even worse, at least 22 dB difference between > the AUX IN and TVTR IN. > > What the heck is going wrong here? MAIN RX dead? > > 73 Udo, DK5YA > > > Am 19.06.2015 um 12:04 schrieb Barry Simpson: >> I have just completed installing the KXV3B in my K3 s/n 1397. It already >> had a KXV3 in it (and a sub receiver which had to be removed and put back) >> and I am pleased to report that it all went together quite easily. >> >> I updated the firmware to the required beta version and the new preamp 2 >> seems to work perfectly although no signals yet heard on 6/10/12m. >> >> I was initially troubled by the pre flashing on the display and thought >> there was some fault. However, I assume that it is an indicator that Pre 2 >> is turned on. Please can you remove that feature as I find it mildly >> irritating. >> >> Mine is an early serial number K3 that I built around August/September 2008 >> and until installing the KXV3B today, I had not even taken the top cover >> off for several years. It was a pleasant surprise to find the interior of >> the K3 looking absolutely pristine and dust free, other than for a very >> light coating on the PA heat sink, which I cleaned off. I also took the >> opportunity of replacing the battery (the original) although the voltage >> still showed 2.97 after all that time when I tested it. >> >> >> 73 >> >> Barry Simpson VK2BJ >> ______________________________________________________________ >> 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 >> Message delivered to dk...@dk5ya.de >> > > -- > ****************************************** > Webs by DK5YA: * > http://www.mmmonvhf.de/ [editor]* > http://www.vhfdx.de/ [owner] * > http://www.palekastro.de/ [owner] * > http://www.solweb.de/ [owner] * > http://www.spessartwetter.de/ [owner] * > ****************************************** > > ______________________________________________________________ > 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 > Message delivered to n...@elecraft.com ______________________________________________________________ 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 Message delivered to arch...@mail-archive.com
