Re: [Elecraft] XV144 transverter problem
I think this condition occurs because, in my case, I am running quite high power, and it occurs if I slip back to receive while still talking. That is, being a little too quick to return to receive. I had the problem with my previous XV144 too. I have carried out the Q7 0.1uF capacitor mod as recommended by Don and, after a little testing, the problem appears to have gone. I have also lost the strange output indication that I got when there was no 144MHz output for now, although I don't think that can be related. I expect, like all these things, it will return at a crucial moment in a contest when I'm trying to work a weak multiplier! Thanks Don and Season's Greetings! Stewart GM4AFF -Original Message- From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Don Wilhelm Sent: 18 December 2014 21:31 To: Jeff Uchitjil; elecraft@mailman.qth.net Subject: Re: [Elecraft] XV144 transverter problem Jeff, Your XV144 may be one of those that are susceptible to a false overload indication. It should not be possible to create an overload situation with 1 mW of drive, although it may be possible to create an overload indication if the XV144 is in receive and it senses an RF input. First check the jumper on the front panel board near the firmware IC. The jumper block should either be off or plugged onto only 1 pin. Most likely, it is a false overload indication caused by noise pickup on the front panel COR circuit. Remove the front panel metalwork (the board can stay connected to the RF board) and find Q7. Solder a 0.1uF capacitor between the collector and emitter of Q7. That bypasses the noise and prevents a false indication. 73, Don W3FPR On 12/18/2014 2:12 PM, Jeff Uchitjil wrote: I just completed my XV144 and everything seems to work with it it, except it seems to randomly trip a relay in it for a split second. Like it is trying to transmit. Occasionally this will result in the overload flashing lights and I have to turn everything off and reset it. The meter on my K2 briefly flashes to full scale when this happens. I have it hooked up with the KX60XV and KIO. __ 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 stew...@gm4aff.net - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4253/8770 - Release Date: 12/19/14 __ 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
[Elecraft] XV144 - power out with no drive
I have an intermittent problem with my XV144 (driven by a K3). On transmit I can see power output on the LEDs (3 greens) even when there is no audio input and the transverter is getting quite hot. Stations tell me my signal sounds fine with no background noise. So it's generating RF somewhere else! Also, more seriously, occasionally, when I return to receive after transmitting, the transverter LEDs all illuminate, I lose receive sensitivity almost completely, although I can still barely hear louder signals. The transverter won't transmit unless I switch off and on the K3 and the XV144. This occurs more often as the transverter heats up. I can't tell whether the first problem relates to the second or vice versa. The second problem was the first to occur and happened on a previous XV144 I owned, so it's not just a one-off. Any ideas or suggestions? Thanks! Stewart GM4AFF __ 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
Re: [Elecraft] XV144 - power out with no drive
Hi Don, Input set to 1mW and using a K3 with a proper cable. When I switch back to receive the XV144 always switches back to receive - like I said, I can still hear louder stations. This doesn't mean that something on the board isn't continuing to emit some kind of RF though. The LEDs don't flash, they just illuminate and stay that way until I switch off the 12v DC power. I received another reply off-list from someone with a similar problem who suggested contacting Elecraft for a fix. 73 Stewart -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: 14 December 2014 19:20 To: Stewart GM4AFF; elecraft@mailman.qth.net Subject: Re: [Elecraft] XV144 - power out with no drive Stewart, What input level do you have the XV144 set for? The 1mW level from the KXV3 or the high power input from the K3 ANT1 or ANT2 jacks? It is important that I know before I can venture a reasonable guess. Are you using the Elecraft transverter cable to operate the XV144, or do you have it configured for non-Elecraft and keying it with the PTT line (you should have one or the other, but not both). See the XVnnn Owner's Manual. One thing you can do is see if the XV144 is staying in transmit when it should be switching back to receive. When in receive, what is the voltage at the cathode of D4 - this is the 12T signal and should be zero during receive. The all flashing LEDs condition is an indication of an overload condition or getting RF input while the XV144 is still in receive. If you are using the 1 mW RF input, it should never trigger that condition. There are some XVnnn transverters that falsely detect an overload condition. That is due to noise on the COR detection line. An easy cure for that is to remove the front panel metalwork and solder a 0.1uf capacitor between the collector and emitter of Front Panel Q7. It can easily be added to the solder side of Q7 without removing the front panel board. 73, Don W3FPR On 12/14/2014 9:52 AM, Stewart GM4AFF wrote: I have an intermittent problem with my XV144 (driven by a K3). On transmit I can see power output on the LEDs (3 greens) even when there is no audio input and the transverter is getting quite hot. Stations tell me my signal sounds fine with no background noise. So it's generating RF somewhere else! Also, more seriously, occasionally, when I return to receive after transmitting, the transverter LEDs all illuminate, I lose receive sensitivity almost completely, although I can still barely hear louder signals. The transverter won't transmit unless I switch off and on the K3 and the XV144. This occurs more often as the transverter heats up. - No virus found in this message. Checked by AVG - www.avg.com Version: 2015.0.5577 / Virus Database: 4235/8734 - Release Date: 12/14/14 __ 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
RE: [Elecraft] K2: Vivat Rex
I hope the ON at the other end was using an Elecraft radio too - he was the one doing the work! 73 GM4AFF -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of WA6L Sent: 27 November 2008 16:00 To: elecraft@mailman.qth.net Subject: [Elecraft] K2: Vivat Rex After months of using my K3, I am spending time again with my K2. It is set up as a QRP model, and I recently upgraded it with the DSP option. I had forgotten what a pleasure it is to use the K2. I know that the specs are not as good as its K3 big brother, but the receiver is still a thing of beauty. This morning I worked Belgium (from San Diego) with 5 watts. The op on the other end was surprised to hear California, much less a QRP station. There is definitely some mojo going on there. So I don't know if I have a point, other than to remind myself and others that the K2 is still a top-notch rig and I am glad I still have it. 73 and Happy Thanksgiving to all! John, WA6L -- View this message in context: http://n2.nabble.com/K2%3A--Vivat-Rex-tp1585677p1585677.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 No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.9.10/1810 - Release Date: 11/24/2008 2:36 PM ___ 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
RE: [Elecraft] K3: delay in ssb monitor
Olli, I had this problem until this weekend when I downloaded the latest firmware (2.38). I (and others) had thought it was associated with the audio ground and my SO2R controller, but looks like it wasn't! 73 Stewart GM4AFF -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Michael E. Issinger Sent: 06 October 2008 14:15 To: elecraft@mailman.qth.net Subject: [Elecraft] K3: delay in ssb monitor Hi K3 reflector, i worked today with the K3 on SSB and i noticed a little delay between my spech and the monitored signal. I guess this is caused by the TX- Audio Synthy. Is there any sugestion for the settings to get off this delay? thanks Olli, DH2WQ No virus found in this incoming message. Checked by AVG. Version: 8.0.100 / Virus Database: 270.7.5/1705 - Release Date: 10/3/2008 8:18 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
