Re: [Elecraft] Elecraft K3 Problem
Hello group, The K3 problem was quickly solved by Leo Duursma, PA0LMD. An RF choke (RFC30) was open. Thus, the diodes D25 did not get the required switching voltage. Thanks to all that helped with evaluating the problem. 73, Per-Tore DL/LA7NO __ 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] Elecraft K3 Problem
Hi Per-Tore, Can you identify which transistor (or other device) on the LPA module is getting hot in transmit mode? The drain terminals of MOSFET PA transistors Q4 and Q5 receive +12V regardless of TX or RX mode, but the gate bias voltages are applied only in TX mode. Unless there's a problem with the bias regulator circuit (U1), the RF amplifier chain on the LPA module should not be getting that warm. It is also possible that one of the RF power transistors may be getting hot because it is no longer making good thermal contact with the bottom cover panel - it would be good to check the tightness of the three screws holding those transistors against the bottom panel. Is it possible for you to carefully extract the LPA module from the main RF board? That requires removal of the rear panel of the bottom cover, and you may need new thermal pads for the RF transistors if those pads are damaged by removal of the cover panel. If you can remove the LPA module, you might try RX mode ONLY with the Power control set to 0 (to ensure that the KPA3 PA is bypassed by its relay K1) and see if your receive sensitivity is restored. The output side of the LPA module is nominally connected only in TX mode to the antenna path via diode D1 on the LPA module, and if the D1 switch is operating properly one would not expect the high attenuation of signals in RX mode. The output of the LPA module is also connected to the input of the 100 W PA module at the same point on the T/R switch circuit, but that module is bypassed by relay K1 on the KPAIO3 board. I'm not yet sure how the overheating of a device on the LPA board is connected to the loss of RX sensitivity. If the diode switch D1 on the LPA module has failed shorted (unlikely), then it would leave the output circuitry of the LPA module bridged across the antenna signal path in RX mode. Keep us posted on what you learn! 73, Mike, K8CN -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 Problem
Measured voltages over the PIN-diodes D26 & D27. In Rx: 0,72 VDC. over both. In Tx, the voltages varied a bit around 0,4-0,6 VDC. While in TX, even with power set to 0,0W, one of the transistors in the LPA is getting quite hot. Cools down when switching over to Rx. P-T On Fri, 14 Aug 2020 at 17:59, Per-Tore Aasestrand wrote: > Hi, > > Still working on finding a solution to the below problem. > > Elecraft support said: > > "Since you are hearing signals, on frequency is presumed, only attenuated > ~30 dB, > The SYNTH circuit is not the first place I would look." > > Any suggestion wrt where to look first? > I guess it must be somewhere on the RF Board. > > Where can I find the PCB layouts with components id's? > > 73, > > Per-Tore > LA7NO > > --- > > The K3 suddenly stopped working. > One day all OK, the next day serious problems. > > Serial no.: 07818. > It has ATU and 100 W PA installed, and also a P3 connected. > Both K3 and P3 were earlier well calibrated. > Supply: 14,5 VDC. > > Symptoms: > - Rx seriously reduced sensitivity, only strong signals to be heard. > - No Tx output. Tuning not successful, no SWR indicated (only the 3 > hyphens). > - Same on all bands. > - All displays, controls and menus apparently working normal. > - Mic-gain & ALC normal indication on SSB. > > All menu settings seem to be OK. > > Connected an XG3 and injected a -73 dBm signal. > It showed up on all bands with signal level about -100 dBm, so around 30 dB > attenuation. > > Connected a LP-100A and a 50 ohm dummy load. > Whatever we tried, the LP-100A indicated zero power out on all bands. > Same on both Ant1 and Ant2. > Bypassed the ATU: no change. > Set power to < 10 W, effectively bypassing the PA: no change. > > It is clearly something that is common for both Rx and Tx. > It is independent of the selected band. > Apparently not related to ATU or PA. > > So, it could be some relay problem, or related to the SWR bridge or > LP-filters. > > Hope you can give some helpful ideas on how to proceed. > > __ 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] Elecraft K3 Problem
Hi, Still working on finding a solution to the below problem. Elecraft support said: "Since you are hearing signals, on frequency is presumed, only attenuated ~30 dB, The SYNTH circuit is not the first place I would look." Any suggestion wrt where to look first? I guess it must be somewhere on the RF Board. Where can I find the PCB layouts with components id's? 73, Per-Tore LA7NO --- The K3 suddenly stopped working. One day all OK, the next day serious problems. Serial no.: 07818. It has ATU and 100 W PA installed, and also a P3 connected. Both K3 and P3 were earlier well calibrated. Supply: 14,5 VDC. Symptoms: - Rx seriously reduced sensitivity, only strong signals to be heard. - No Tx output. Tuning not successful, no SWR indicated (only the 3 hyphens). - Same on all bands. - All displays, controls and menus apparently working normal. - Mic-gain & ALC normal indication on SSB. All menu settings seem to be OK. Connected an XG3 and injected a -73 dBm signal. It showed up on all bands with signal level about -100 dBm, so around 30 dB attenuation. Connected a LP-100A and a 50 ohm dummy load. Whatever we tried, the LP-100A indicated zero power out on all bands. Same on both Ant1 and Ant2. Bypassed the ATU: no change. Set power to < 10 W, effectively bypassing the PA: no change. It is clearly something that is common for both Rx and Tx. It is independent of the selected band. Apparently not related to ATU or PA. So, it could be some relay problem, or related to the SWR bridge or LP-filters. Hope you can give some helpful ideas on how to proceed. __ 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] Elecraft K3 problem
Hi, Checked all TMP connectors - no change. P-T - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
That is why just looking for loose TMP connectors may not be sufficient. While you are inside the K3, give all the TMP connectors a slight twist which should clear some of the corrosion. 73, Don W3FPR On 7/27/2020 6:25 PM, Wes wrote: I've had TMP connectors badly corroded in my K3. See: https://groups.io/g/Elecraft-K3/album?id=37256 Wes N7WS __ 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] Elecraft K3 problem
I've had TMP connectors badly corroded in my K3. See: https://groups.io/g/Elecraft-K3/album?id=37256 Wes N7WS On 7/27/2020 12:04 PM, Mike K8CN wrote: Aye, Wes, indeed you did! I wasn't thinking of LO drive levels when I first read your post, but was thinking of common signal paths for TX and RX through the T/R switch and no deeper into the signal processing chain. Let's hope your and Martin's suggestion proves to be the true cause of Per-Tore's issue. Thanks, and 73, Mike, K8CN __ 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] Elecraft K3 problem
Aye, Wes, indeed you did! I wasn't thinking of LO drive levels when I first read your post, but was thinking of common signal paths for TX and RX through the T/R switch and no deeper into the signal processing chain. Let's hope your and Martin's suggestion proves to be the true cause of Per-Tore's issue. Thanks, and 73, Mike, K8CN -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
I thought I said that. On 7/27/2020 10:34 AM, Mike K8CN wrote: I agree with Martin's simpler hypothesis. The sudden change of behavior in both TX and RX modes could well result from insufficient LO drive to either the 1st or 2nd mixers. Check that possibility before launching into detailed testing of the PIN diode T/R switch. It may be as simple as a loose or corroded TMP connector. Mike, K8CN __ 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] Elecraft K3 problem
I agree with Martin's simpler hypothesis. The sudden change of behavior in both TX and RX modes could well result from insufficient LO drive to either the 1st or 2nd mixers. Check that possibility before launching into detailed testing of the PIN diode T/R switch. It may be as simple as a loose or corroded TMP connector. Mike, K8CN -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
Hi Per-Tore, I don't know if there's an easy way to check the PIN diodes in the T/R switch, especially since the SMD components of the switch are mostly on the underside of the RF board. Here's where I would start: 1) Find spots on the RF board (top side) where you can measure the control voltages 7R and 7T. Verify that these change in opposition to each other, i.e. if 7R is high, 7T should be low and vice-versa, when changing from RX mode to TX mode and back. 2) Presuming that both voltages 7R and 7T behave properly in switching from RX to TX mode and back, I would measure the voltage on the drain of Q7, the MOSFET switch, when 7R is high. Assertion of 7R should pull the Q7 drain voltage low, which causes sufficient current to pass through both PIN diodes D26 and D27 to enable the RX signal to pass through, presuming there is not a problem with PIN diode D25. 3) It is possible that the Q7 drain voltage could be pulled low if only one of PIN diodes D26 or D27 functions properly and the other has failed open, so test (2) is not conclusive. 4) If you have a scope with a 10X probe, I would check for presence of RF on the anode of PIN diode D43 when in TX mode - any frequency on the VFO within the scope bandwidth should suffice. D43 must be forward-biased by the 7T voltage in order for RF drive to be coupled to the low power (10 Watt) PA assembly (Z2 on the block diagram). The fact that you have not been able to detect any transmitted power in TX mode whether the 100 watt PA is bypassed or not may indicate that the low power PA is not receiving drive from the mixer. The 7T voltage is supplied to the anode of D43 via the low power PA input connector, but it's unlikely that the simple path internal to the low power PA board is at fault, i.e. 7T is not reaching D43. I haven't had my K3 opened up for many years, nor have I experienced the problem you described, so I can't easily point out where to access the circuit points mentioned above. There is another set of PIN diode switches around the mixer, but I would start with those closest to the low power PA before going further back up the signal processing chain. 73, Mike, K8CN -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
Apologies, I just saw the serial number 7818, quite a bit newer so maybe not a failed capacitor, yet :) Martin, H0ZED On 27/7/63 23:32, Martin Sole wrote: Hi, What Serial number? I have found on my own and a friends K3, both very low S/N around 300, that the KREF3 board has been the culprit for this exact problem. First check the all the TMP cables to and from the KREF3 board and the synths. If all look good you should examine the K3REF board. In both cases I have found 100nF (0.1uF) capacitors on this board to be essentially a low DC resistance. Look in particular at the 5 volt line. This supply affect IC6 the divide by 6 which provides both the second LO for the receivers and one input to the mixer for the TXIF1. Measure the resistance to ground from either side of L1 and L2 to figure out which capacitor is likely the cause of the problem. Please keep the list posted on what you find. Martin, HS0ZED On 27/7/63 19:50, LA7NO wrote: Hello, The K3 suddenly stopped working. One day all OK, the next day serious problems. Serial no.: 07818. It has ATU and 100 W PA installed, and also a P3 connected. Both K3 and P3 were earlier well calibrated. Supply: 14,5 VDC. Symptoms: - Rx seriously reduced sensitivity, only strong signals to be heard. - No Tx output. Tuning not successful, no SWR indicated (only the 3 hyphens). - Same on all bands. - All displays, controls and menus apparently working normal. - Mic-gain & ALC normal indication on SSB. All menu settings seem to be OK. Connected an XG3 and injected a -73 dBm signal. It showed up on all bands with signal level about -100 dBm, so around 30 dB attenuation. Connected a LP-100A and a 50 ohm dummy load. Whatever we tried, the LP-100A indicated zero power out on all bands. Same on both Ant1 and Ant2. Bypassed the ATU: no change. Set power to < 10 W, effectively bypassing the PA: no change. It is clearly something that is common for both Rx and Tx. It is independent of the selected band. Apparently not related to ATU or PA. So, it could be some relay problem, or related to the SWR bridge or LP-filters. Hope you can give some helpful ideas on how to proceed. Best regards & 73 from Norway, Per-Tore / LA7NO - 73, Per-Tore / LA7NO -- Sent from:http://elecraft.365791.n2.nabble.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 tohs0...@gmail.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
Re: [Elecraft] Elecraft K3 problem
Hi, What Serial number? I have found on my own and a friends K3, both very low S/N around 300, that the KREF3 board has been the culprit for this exact problem. First check the all the TMP cables to and from the KREF3 board and the synths. If all look good you should examine the K3REF board. In both cases I have found 100nF (0.1uF) capacitors on this board to be essentially a low DC resistance. Look in particular at the 5 volt line. This supply affect IC6 the divide by 6 which provides both the second LO for the receivers and one input to the mixer for the TXIF1. Measure the resistance to ground from either side of L1 and L2 to figure out which capacitor is likely the cause of the problem. Please keep the list posted on what you find. Martin, HS0ZED On 27/7/63 19:50, LA7NO wrote: Hello, The K3 suddenly stopped working. One day all OK, the next day serious problems. Serial no.: 07818. It has ATU and 100 W PA installed, and also a P3 connected. Both K3 and P3 were earlier well calibrated. Supply: 14,5 VDC. Symptoms: - Rx seriously reduced sensitivity, only strong signals to be heard. - No Tx output. Tuning not successful, no SWR indicated (only the 3 hyphens). - Same on all bands. - All displays, controls and menus apparently working normal. - Mic-gain & ALC normal indication on SSB. All menu settings seem to be OK. Connected an XG3 and injected a -73 dBm signal. It showed up on all bands with signal level about -100 dBm, so around 30 dB attenuation. Connected a LP-100A and a 50 ohm dummy load. Whatever we tried, the LP-100A indicated zero power out on all bands. Same on both Ant1 and Ant2. Bypassed the ATU: no change. Set power to < 10 W, effectively bypassing the PA: no change. It is clearly something that is common for both Rx and Tx. It is independent of the selected band. Apparently not related to ATU or PA. So, it could be some relay problem, or related to the SWR bridge or LP-filters. Hope you can give some helpful ideas on how to proceed. Best regards & 73 from Norway, Per-Tore / LA7NO - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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 hs0...@gmail.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
Re: [Elecraft] Elecraft K3 problem
Thanks, Mike. I guess this is the MA4P PIN diodes D26 & D27. Is there an easy way to check those? P-T - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
You might check the PIN diode T/R switch. The high attenuation in RX mode and no output power even when the 100 W PA is bypassed suggest that one or more of the PIN diodes in the T/R switch have failed "open." Mike, K8CN -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
Yes, all bands are the same. Received signals are normal in all respects, except signal strength. P-T - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
All Bands? If receiving a strong station, is it on frequency? 73 George AI4VZ -Original Message- From: LA7NO Sent: Monday, July 27, 2020 8:50 AM To: elecraft@mailman.qth.net Subject: [Elecraft] Elecraft K3 problem Hello, The K3 suddenly stopped working. One day all OK, the next day serious problems. Serial no.: 07818. It has ATU and 100 W PA installed, and also a P3 connected. Both K3 and P3 were earlier well calibrated. Supply: 14,5 VDC. Symptoms: - Rx seriously reduced sensitivity, only strong signals to be heard. - No Tx output. Tuning not successful, no SWR indicated (only the 3 hyphens). - Same on all bands. - All displays, controls and menus apparently working normal. - Mic-gain & ALC normal indication on SSB. All menu settings seem to be OK. Connected an XG3 and injected a -73 dBm signal. It showed up on all bands with signal level about -100 dBm, so around 30 dB attenuation. Connected a LP-100A and a 50 ohm dummy load. Whatever we tried, the LP-100A indicated zero power out on all bands. Same on both Ant1 and Ant2. Bypassed the ATU: no change. Set power to < 10 W, effectively bypassing the PA: no change. It is clearly something that is common for both Rx and Tx. It is independent of the selected band. Apparently not related to ATU or PA. So, it could be some relay problem, or related to the SWR bridge or LP-filters. Hope you can give some helpful ideas on how to proceed. Best regards & 73 from Norway, Per-Tore / LA7NO - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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 gdanne...@gmail.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
Re: [Elecraft] Elecraft K3 problem
Yes, as I said, same problem on both Ant1 & Ant2. - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
Would not that make the rx dead? I can hear strong signals. But the tx is giving no output. - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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
Re: [Elecraft] Elecraft K3 problem
Did you check the antenna selection? -- 73, -John NI0K https://www.qrz.com/db/NI0K LA7NO wrote on 7/27/2020 7:50 AM: Hello, The K3 suddenly stopped working. One day all OK, the next day serious problems. Serial no.: 07818. It has ATU and 100 W PA installed, and also a P3 connected. Both K3 and P3 were earlier well calibrated. Supply: 14,5 VDC. Symptoms: - Rx seriously reduced sensitivity, only strong signals to be heard. - No Tx output. Tuning not successful, no SWR indicated (only the 3 hyphens). - Same on all bands. - All displays, controls and menus apparently working normal. - Mic-gain & ALC normal indication on SSB. All menu settings seem to be OK. Connected an XG3 and injected a -73 dBm signal. It showed up on all bands with signal level about -100 dBm, so around 30 dB attenuation. Connected a LP-100A and a 50 ohm dummy load. Whatever we tried, the LP-100A indicated zero power out on all bands. Same on both Ant1 and Ant2. Bypassed the ATU: no change. Set power to < 10 W, effectively bypassing the PA: no change. It is clearly something that is common for both Rx and Tx. It is independent of the selected band. Apparently not related to ATU or PA. So, it could be some relay problem, or related to the SWR bridge or LP-filters. Hope you can give some helpful ideas on how to proceed. Best regards & 73 from Norway, Per-Tore / LA7NO - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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 jasimm...@pinewooddata.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
Re: [Elecraft] Elecraft K3 problem
May be a LO problem. Check all of the TMP cables. Wes N7WS On 7/27/2020 5:50 AM, LA7NO wrote: Hello, The K3 suddenly stopped working. One day all OK, the next day serious problems. Serial no.: 07818. It has ATU and 100 W PA installed, and also a P3 connected. Both K3 and P3 were earlier well calibrated. Supply: 14,5 VDC. Symptoms: - Rx seriously reduced sensitivity, only strong signals to be heard. - No Tx output. Tuning not successful, no SWR indicated (only the 3 hyphens). - Same on all bands. - All displays, controls and menus apparently working normal. - Mic-gain & ALC normal indication on SSB. All menu settings seem to be OK. Connected an XG3 and injected a -73 dBm signal. It showed up on all bands with signal level about -100 dBm, so around 30 dB attenuation. Connected a LP-100A and a 50 ohm dummy load. Whatever we tried, the LP-100A indicated zero power out on all bands. Same on both Ant1 and Ant2. Bypassed the ATU: no change. Set power to < 10 W, effectively bypassing the PA: no change. It is clearly something that is common for both Rx and Tx. It is independent of the selected band. Apparently not related to ATU or PA. So, it could be some relay problem, or related to the SWR bridge or LP-filters. Hope you can give some helpful ideas on how to proceed. Best regards & 73 from Norway, Per-Tore / LA7NO - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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 wes_n...@triconet.org __ 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] Elecraft K3 problem
Hello, The K3 suddenly stopped working. One day all OK, the next day serious problems. Serial no.: 07818. It has ATU and 100 W PA installed, and also a P3 connected. Both K3 and P3 were earlier well calibrated. Supply: 14,5 VDC. Symptoms: - Rx seriously reduced sensitivity, only strong signals to be heard. - No Tx output. Tuning not successful, no SWR indicated (only the 3 hyphens). - Same on all bands. - All displays, controls and menus apparently working normal. - Mic-gain & ALC normal indication on SSB. All menu settings seem to be OK. Connected an XG3 and injected a -73 dBm signal. It showed up on all bands with signal level about -100 dBm, so around 30 dB attenuation. Connected a LP-100A and a 50 ohm dummy load. Whatever we tried, the LP-100A indicated zero power out on all bands. Same on both Ant1 and Ant2. Bypassed the ATU: no change. Set power to < 10 W, effectively bypassing the PA: no change. It is clearly something that is common for both Rx and Tx. It is independent of the selected band. Apparently not related to ATU or PA. So, it could be some relay problem, or related to the SWR bridge or LP-filters. Hope you can give some helpful ideas on how to proceed. Best regards & 73 from Norway, Per-Tore / LA7NO - 73, Per-Tore / LA7NO -- Sent from: http://elecraft.365791.n2.nabble.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
[Elecraft] Elecraft K3 Problem!!
Hello Glenn! I found an old Thread from you in the Elecraft reflector. On the 28th of March 2009 you wrote that your K3 failed to load the FPF at the address x0040!!! I have the same problem now with my K3!!! Did you get it back to life? If yes, what´s the solution?? Hope to hear from you!!! 73s Alex OE6ASF, NH7VW, HB9TSF __ 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
Re: [Elecraft] Elecraft K3 Problem with new K3 Utility
Just downloaded & installed here and I use the paid version of Zone Alarm. Gave no indication on download or install. Jim K0XU On Thu, Oct 14, 2010 at 3:53 PM, Dick Dievendorff wrote: > I just submitted the setup executable to the free multi-engine virus scan > web sites (http://virusscan.jotti.org) and none of the 19 anti-virus tools > on that web site found any evidence of malware. (Zone Alarm was not one of > the 19). > > NoVirusThanks.org (another site that hosts multiple virus scanners) used 17 > scanners and found no evidence of malware. Zone Alarm was not one of the 17 > virus scanning tools. It reported the file "clean". > > Dick, K6KR > > > > Report date:2010-10-14 22:46:04 (GMT 1) > File name: k3-utility-setup-1-3-10-11-exe > File size: 1369311 bytes > MD5 hash: c1a12095ed4b08cbbce58378e185abec > SHA1 hash: 239c0371e1b3f576649926b790226869213a44e1 > Detection rate: 0 on 16 (0%) > Status: CLEAN > Antivirus DatabaseEngine Result > a-squared 14/10/2010 5.0.0.20 > Avast 14/10/2010 5.0 > AVG 14/10/2010 9.0.0.725 > Avira AntiVir 14/10/2010 7.6.0.59 > BitDefender 14/10/2010 7.0.0.2555 > ClamAV 14/10/2010 0.96.2.1 > Comodo 14/10/2010 4.0 > Dr.Web 14/10/2010 5.00.0 > F-PROT6 14/10/2010 4.6.1.107 > Ikarus T3 14/10/2010 1001084 > Kaspersky 14/10/2010 9.0.0.736 > NOD32 14/10/2010 4.2.42.0 > Panda 14/10/2010 10.0.3.0 > TrendMicro 14/10/2010 9.120-1004 > VBA32 14/10/2010 3.12.14.1 > VirusBuster 14/10/2010 1.5.6 > Extra information > File type: Executable File (EXE) > Packer: Nothing found > Binder detector:Nothing found > PDF analyzer: Nothing found > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Lankshear > Sent: Thursday, October 14, 2010 1:32 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] Elecraft K3 Problem with new K3 Utility > > I've come across a problem trying to install the new K3 utility onto my > computer that's running an up to date version of Windows XP Pro. > > > > I downloaded it to a file and then ran it. My firewall, the free version > of > ZoneAlarm, blocked K3UtilitySetup_1_3_10_11.tmp(4656) reporting that it > contained Trojan WIN32.GenericIBT > > > > Any helpful comment or guidance would be much appreciated, thanks. > > > > 73 Dave G3TJP > > __ > 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 > __ 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
Re: [Elecraft] Elecraft K3 Problem with new K3 Utility
I just submitted the setup executable to the free multi-engine virus scan web sites (http://virusscan.jotti.org) and none of the 19 anti-virus tools on that web site found any evidence of malware. (Zone Alarm was not one of the 19). NoVirusThanks.org (another site that hosts multiple virus scanners) used 17 scanners and found no evidence of malware. Zone Alarm was not one of the 17 virus scanning tools. It reported the file "clean". Dick, K6KR Report date:2010-10-14 22:46:04 (GMT 1) File name: k3-utility-setup-1-3-10-11-exe File size: 1369311 bytes MD5 hash: c1a12095ed4b08cbbce58378e185abec SHA1 hash: 239c0371e1b3f576649926b790226869213a44e1 Detection rate: 0 on 16 (0%) Status: CLEAN Antivirus DatabaseEngine Result a-squared 14/10/2010 5.0.0.20 Avast 14/10/2010 5.0 AVG 14/10/2010 9.0.0.725 Avira AntiVir 14/10/2010 7.6.0.59 BitDefender 14/10/2010 7.0.0.2555 ClamAV 14/10/2010 0.96.2.1 Comodo 14/10/2010 4.0 Dr.Web 14/10/2010 5.00.0 F-PROT6 14/10/2010 4.6.1.107 Ikarus T3 14/10/2010 1001084 Kaspersky 14/10/2010 9.0.0.736 NOD32 14/10/2010 4.2.42.0 Panda 14/10/2010 10.0.3.0 TrendMicro 14/10/2010 9.120-1004 VBA32 14/10/2010 3.12.14.1 VirusBuster 14/10/2010 1.5.6 Extra information File type: Executable File (EXE) Packer: Nothing found Binder detector:Nothing found PDF analyzer: Nothing found -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of David Lankshear Sent: Thursday, October 14, 2010 1:32 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Elecraft K3 Problem with new K3 Utility I've come across a problem trying to install the new K3 utility onto my computer that's running an up to date version of Windows XP Pro. I downloaded it to a file and then ran it. My firewall, the free version of ZoneAlarm, blocked K3UtilitySetup_1_3_10_11.tmp(4656) reporting that it contained Trojan WIN32.GenericIBT Any helpful comment or guidance would be much appreciated, thanks. 73 Dave G3TJP __ 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
[Elecraft] Elecraft K3 Problem with new K3 Utility
I've come across a problem trying to install the new K3 utility onto my computer that's running an up to date version of Windows XP Pro. I downloaded it to a file and then ran it. My firewall, the free version of ZoneAlarm, blocked K3UtilitySetup_1_3_10_11.tmp(4656) reporting that it contained Trojan WIN32.GenericIBT Any helpful comment or guidance would be much appreciated, thanks. 73 Dave G3TJP __ 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
