[Elecraft] K3 power problem with LPA FETs
Others have asked so I took a little time today to consolidate my disorganized notes and will add it below. 73, Chet, N8RA Assembled below are the notes from my experience in finding and fixing a power out problem on my K3. Where possible, I tried to give credit to the authors, to all of which I am grateful. TESTS FOR THE MOSFETS. The 3-screw finger test from WA6VAB and others: There are 3 MOSFETs of the LPA that are heat-sinked to the bottom of the radio by being connected to the bottom plate using phillips head screws. Check your manual for their location Place the radio so it is raised up using the front bail and place your fingers on the 3 screw that are holding the 3 MOSFETs. Key the PTT so the XTR is on. All 3 should get warm, Not HOT or Cold. Hot = shorted, Cold = open, Warm = normal. WE6R factory tech comments: The 3-finger bottom cover on and going into full TX test is valid, just takes longer and a bit harder to tell what is happening. You can do the 3-finger check with the bottom cover OFF, but DO NOT Transmit, just TAP xmit to turn the Bias ON. (and have the mode set to USB or LSB-ed). Stop the test after 10-15 seconds. Good devices will get hot fast. (N8RA- Note that the MOSFETs have sticky pad attached to them and if the bottom cover has not been off for a while, it may take some gentle wiggling to get the bottom cover off.) N8RA test using the front panel power supply current display: If there is a KPA3 installed, configure it to NOT INST and cycle power so you do not have its current added. Tap DISP and turn the VFO-B knob to get to the current display. Turn transmitter power below 10w and put the transmitter in “test” mode with the mode button. Note the difference in current from receive to that when tapping the xmit button. The difference should be about 600 ma. If significantly less or more, then one of the MOSFETs in the low power amp (LPA) may be bad or not biased properly. Reset your KPA3 configuration back to NOR (normal). ORDER THE RIGHT MOSFET Only one of my MOSFETs was bad, but I replaced both output MOSFETs. With one failed, the other had been carrying the whole load to produce output so may have been over-worked, over-stressed and hurting. To be sure of getting the right vintage of RD15HVF1 MOSFETs, last year I ordered them (and thermal insulators) from Elecraft. My order was shipped that same day and arrived via priority mail 2 days later. Great service. RF Parts is also a source. It has been reported that the earlier MOSFET with -101 is the one to get for the K3. DOING THE REPAIR Obviously, the bottom cover must come off. The MOSFETs have sticky pads between them and the bottom cover, so it may take some gentle wiggling to free it. MOSFET means USE CARE to prevent ESD damage. Use a soldering iron with a grounded tip. Wear an ESD strap, if you do not have one, keep your other wrist on a metal part of the K3 case. Note the bending direction and bent lead distance of the MOSFETs to prep the new parts. Take extra ESD care when handling these transistors by themselves. Cut the leads of a bad part near the body and then unsolder each lead from its pcb hole. Use a solder sucker or wick to open the pcb holes. Mount the new MOSFET and reflow its 3 pcb holes. Add the heat sink pads to the MOSFET tabs and put the bottom cover back on. MOSFET BIAS ADJUST From Elecraft Customer Support: You'll need to follow this sequence for setting bias after the fix: 1. Remove the 100 watt amplifier (if installed) by disconnecting the fan panel and their 2 connector wires, and the 2 wires to the circuit breaker. Use care to not pull on the KPA3 too hard and thus let it fly off the connectors and cause damage to it or to the chassis. Use gentle but firm finger pressure, or pry carefully with a plastic tool (such as the K2 green plastic alignment tool), near the two PCB connectors. This will usually help the KPA3 start to move. (N8RA: The Elecraft document “KPA3CONMDKT MOD Kit Manual” has a wonderful description of how to remove and reinstall the 100W amplifier to allow access to the LPA’s adjustment potentiometers.) 2. Locate small SMD pots R18, R19 and R24 near the center of the LPA board. Turn the pots to minimum. (White pots fully CW, Black pots fully CCW) 3. Turn the power knob down to ZERO. 4. Tap DISP, (display button), use VFO B to display the current drawn by the radio. For more accurate results, insert a DMM in the positive power supply lead that is set to a current range that can handle up to 2-3 amps. 5. Hold TEST (the right hand side of the MODE button). This puts the K3 in TEST mode with no RF drive.(but it will not light the red xmt led) 6. Tap XMIT. You will see a current of approx 1 to 2A (depending on options in radio) but the red TX LED will not come on. Adjust R18 to increase the reading by 0.2A IE 200ma 7. Adjust R19 to increase the current another 0.2A 8. Adjust R24 to increase the cu
[Elecraft] K3 Power problem: won't shut down and blank screen on power on
Elecrafters: Tech support at Elecraft is closed at the moment. I had a nice QSO with W0YY a few minutes ago and when I went to shut down the K3, the "Power" button did not work. Tried pushing it from a variety of angles, no dice. I powered down by turning my Astron RS-35M off - that did the trick! After supper, I sat down for some 40 meter fun and, lo and behold, the power button worked BUT the display is BLANK…no K4TM welcoming message….TOTALLY BLANK! Any ideas before Elecraft tech support comes on line for me about noon tomorrow? Tnx & 73, Cary, K4TM Lynchburg VA Elecraft K3-100 #3448, KAT500 #144, KPA500 #698 h3c...@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
Re: [Elecraft] K3 Power Problem ??
Dave, Thank you for taking he time to take the measurements nd pass them along. I said in my previous post that I had calibrated the wattmeter and it seemed to help. Well, it did help some but not enough to completely eliminate high current warnings and subsequent power reductions. In trouble shooting I have found that some interesting things. 1. Going through the tuner part of my antenna tuner adds about three (3) more amps than going direct through the tuner. 2. I have set CONFIG:WMTR to the setting (180) that requires least current regardless of actual external meter indication. If the setting (160) is used that indicates 50 watts on the external meter when 50 is set on the radio, the current is nearly one amp higher. 3. When the radio is room temperature on 20 meters with 100 watts set, the current is 20.25 amps when going directly into two different dummy loads. After about four minutes of 15 seconds on and off the current is 21.6 amps and climbing. 4. When using an antenna with an SWR of higher than 1.2:1, the current warning is always displayed with subsequent power reduction. 5. I have found the current warning threshold is at about 24.5 amps. It seems the high current warning only is displayed during RTTY at 100 watts into less than a perfect antenna while tuning with an external antenna tuner. I've never seen the warning in any other mode. If this is in fact normal then I'm very disappointed with my K3. It sure spoiled my contest effort today. I've previously learned that the S-meter does not respond in the way I would expect. These and 2-3 other issues have left a less than sterling impression of the K3. I'm trying hard to like this radio but my offshore rig doesn't have these kind of issues. Does anyone else on the list have high current warnings when running RTTY at 100 watts? If support is listening I sure would like to hear from you. Jim, W0EM 100W measured on the following bands gives: 160m, 18.1 A 80m, 17.3A 40m, 22.5A 30m, 21.5A 20m, 20.5A 15m, 19.4A 10m, 17.5A 6m, 21.5A These figures were with 13.5 ~ 13.4 Volts from my power supply as measured on the K3's display (both for Amps and Voltage). Power measurement into a 50 Ohm load with a calibrated LP-100 power meter. 73 Dave, G4AON K3/100 #80 -- -- View this message in context: http://n2.nabble.com/K3-Power-Problem-tp4116099p4119926.html Sent from the Elecraft mailing list archive at 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
Re: [Elecraft] K3 Power Problem ??
100W measured on the following bands gives: 160m, 18.1 A 80m, 17.3A 40m, 22.5A 30m, 21.5A 20m, 20.5A 15m, 19.4A 10m, 17.5A 6m, 21.5A These figures were with 13.5 ~ 13.4 Volts from my power supply as measured on the K3's display (both for Amps and Voltage). Power measurement into a 50 Ohm load with a calibrated LP-100 power meter. 73 Dave, G4AON K3/100 #80 -- Dave, What current does your radio draw with 100w output? W5OV __ 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] K3 Power Problem ??
Dave, Looks like you have pointed me in the right direction. I had not done the wattmeter calibration as the manual implies that it is optional. That plus the usual inaccuracies in the average wattmeter I decided to accept the factory settings. This morning I did the procedure and thus far have not had a high current warning. Current is 1-2 amps less than before; still a little on the high side but at least no warnings about it. Knock on wood.. For the Elecraft tech writers and anyone attempting to do the procedure there is an error in the procedure. On page 49 of the Owner's Manual the last step on the bottom left should read tap XMIT rather than hold TUNE. If TUNE is used rather than XMIT the radio will output 20 watts regardless of the power set while calibrating. Thanks for the help. 73, Jim, W0EM Dave G4AON wrote: > > Jim, if you calibrated the K3 Wattmeter with a low reading Wattmeter it > would give the symptoms you describe. The calibration is optional and > calls for an accurate Wattmeter, the K3 already comes calibrated from > the factory. You might have a fault, K3 Support will be able to assist. > > I use the supplied cable and obtain good correlation to the expected > power at 5 and 50 Watts, but slightly less at 100 Watts. There is a > table of the results at: http://www.astromag.co.uk/k3/ > > I've never had an over current warning. > > 73 Dave, G4AON > K3/100 #80 > - > Exactly 100 watts set on K3. Measured about 90 watts out on two external > watt meters. One on an MFJ antenna tuner and the other is a high end MFJ > power meter. They agree within a couple of watts near 100 watts measured. > > Have a good day and 73. > > Jim, W0EM > __ > 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 > > -- View this message in context: http://n2.nabble.com/K3-Power-Problem-tp4116099p4118258.html Sent from the Elecraft mailing list archive at 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
Re: [Elecraft] K3 Power Problem ??
Dave, What current does your radio draw with 100w output? W5OV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dave G4AON Sent: Saturday, December 05, 2009 2:46 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Power Problem ?? Jim, if you calibrated the K3 Wattmeter with a low reading Wattmeter it would give the symptoms you describe. The calibration is optional and calls for an accurate Wattmeter, the K3 already comes calibrated from the factory. You might have a fault, K3 Support will be able to assist. I use the supplied cable and obtain good correlation to the expected power at 5 and 50 Watts, but slightly less at 100 Watts. There is a table of the results at: http://www.astromag.co.uk/k3/ I've never had an over current warning. 73 Dave, G4AON K3/100 #80 - Exactly 100 watts set on K3. Measured about 90 watts out on two external watt meters. One on an MFJ antenna tuner and the other is a high end MFJ power meter. They agree within a couple of watts near 100 watts measured. Have a good day and 73. Jim, W0EM __ 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] K3 Power Problem ??
Jim, if you calibrated the K3 Wattmeter with a low reading Wattmeter it would give the symptoms you describe. The calibration is optional and calls for an accurate Wattmeter, the K3 already comes calibrated from the factory. You might have a fault, K3 Support will be able to assist. I use the supplied cable and obtain good correlation to the expected power at 5 and 50 Watts, but slightly less at 100 Watts. There is a table of the results at: http://www.astromag.co.uk/k3/ I've never had an over current warning. 73 Dave, G4AON K3/100 #80 - Exactly 100 watts set on K3. Measured about 90 watts out on two external watt meters. One on an MFJ antenna tuner and the other is a high end MFJ power meter. They agree within a couple of watts near 100 watts measured. Have a good day and 73. Jim, W0EM __ 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] K3 Power Problem ??
Jim, 23 to 24 amps is excessive current to be drawing at 14v and probably means that you are drawing too much. Have you verified that those watt meters are accurate? As some comparison data, running 100 watts out of my K3 into a 1:1.1 SWR it only draws 17.1 amps. 73, Bob W5OV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Harris Sent: Friday, December 04, 2009 10:41 PM To: w...@w5ov.com; Elecraft Email; Gary Elecraft Subject: Re: [Elecraft] K3 Power Problem ?? Hi, Exactly 100 watts set on K3. Measured about 90 watts out on two external watt meters. One on an MFJ antenna tuner and the other is a high end MFJ power meter. They agree within a couple of watts near 100 watts measured. Have a good day and 73. Jim, W0EM > From: w...@w5ov.com > To: w...@q.com; elecraft@mailman.qth.net; g...@elecraft.com > Subject: RE: [Elecraft] K3 Power Problem ?? > Date: Fri, 4 Dec 2009 21:51:35 -0600 > > Jim, > > 23 to 24 amps on transmit? The manual says you should have 17 to 22. At 14v > it sure sounds like you're running a lot more than 100w out. > > How are you measuring the output? > > W5OV > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Harris > Sent: Friday, December 04, 2009 7:46 PM > To: Elecraft Email; Gary Elecraft > Subject: [Elecraft] K3 Power Problem ?? > > > Hi Folks, > > When doing RTTY at 100 watts a high current warning flashes in the VFO B > display area and RF power is automatically cut back to about 60 watts. SWR > is about 1.1:1 or there abouts; nothing approaching 1.5:1. I have found > there is 0.6 volts drop in the Elecraft supplied power cable (Power Poles > are soldered) and about 0.2 volt drop between my power supply and the output > of the Rigrunner. It's between the power supply and the K3. Voltage at the > radio drops to 13.2 vdc and current is 23-24 amps on transmit. Under that > load the voltage at the power supply drops 0.01 volts. I run the power > supply (it's variable) at 14.0 volts at the supply. It's a 40 amp power > supply. I have a popular off shore rig that has no problem with the > existing power setup. > > In reading the Supply/Voltage Current specifications on page eight (8) of > the Owners Manual I find it recommends "When using reduced supply voltage > (<12volts), power output should be reduced (e.g. 70 W at 11 V). Further, > "For best results, use the supplied 5 foot (1.3 m) power cable." Those two > statements appear to be in error when applied to my radio. > > My K3 appears to be overly sensitive to voltage and current. The only > adjustment I can locate that might relate to this is the menu CONFIG:ADC REF > entry. However, I seriously doubt it will have any impact on this as this > appears to be a serious error and adjust appears to be for fine tuning at > best. > > I certainly would appreciate any ones constructive input on this situation. > I could appreciate knowing the gauge of the supplied cableI'm hoping > that doubling or tripling the size might help. But, that seems to be a > bandaide rather that eliminating the root cause. > > Thank, have a good day and 73. > > Jim, W0EM > > > > __ > 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] K3 Power Problem ??
Hi, Exactly 100 watts set on K3. Measured about 90 watts out on two external watt meters. One on an MFJ antenna tuner and the other is a high end MFJ power meter. They agree within a couple of watts near 100 watts measured. Have a good day and 73. Jim, W0EM > From: w...@w5ov.com > To: w...@q.com; elecraft@mailman.qth.net; g...@elecraft.com > Subject: RE: [Elecraft] K3 Power Problem ?? > Date: Fri, 4 Dec 2009 21:51:35 -0600 > > Jim, > > 23 to 24 amps on transmit? The manual says you should have 17 to 22. At 14v > it sure sounds like you're running a lot more than 100w out. > > How are you measuring the output? > > W5OV > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Harris > Sent: Friday, December 04, 2009 7:46 PM > To: Elecraft Email; Gary Elecraft > Subject: [Elecraft] K3 Power Problem ?? > > > Hi Folks, > > When doing RTTY at 100 watts a high current warning flashes in the VFO B > display area and RF power is automatically cut back to about 60 watts. SWR > is about 1.1:1 or there abouts; nothing approaching 1.5:1. I have found > there is 0.6 volts drop in the Elecraft supplied power cable (Power Poles > are soldered) and about 0.2 volt drop between my power supply and the output > of the Rigrunner. It's between the power supply and the K3. Voltage at the > radio drops to 13.2 vdc and current is 23-24 amps on transmit. Under that > load the voltage at the power supply drops 0.01 volts. I run the power > supply (it's variable) at 14.0 volts at the supply. It's a 40 amp power > supply. I have a popular off shore rig that has no problem with the > existing power setup. > > In reading the Supply/Voltage Current specifications on page eight (8) of > the Owners Manual I find it recommends "When using reduced supply voltage > (<12volts), power output should be reduced (e.g. 70 W at 11 V). Further, > "For best results, use the supplied 5 foot (1.3 m) power cable." Those two > statements appear to be in error when applied to my radio. > > My K3 appears to be overly sensitive to voltage and current. The only > adjustment I can locate that might relate to this is the menu CONFIG:ADC REF > entry. However, I seriously doubt it will have any impact on this as this > appears to be a serious error and adjust appears to be for fine tuning at > best. > > I certainly would appreciate any ones constructive input on this situation. > I could appreciate knowing the gauge of the supplied cableI'm hoping > that doubling or tripling the size might help. But, that seems to be a > bandaide rather that eliminating the root cause. > > Thank, have a good day and 73. > > Jim, W0EM > > > > __ > 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] K3 Power Problem ??
Jim, 23 to 24 amps on transmit? The manual says you should have 17 to 22. At 14v it sure sounds like you're running a lot more than 100w out. How are you measuring the output? W5OV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jim Harris Sent: Friday, December 04, 2009 7:46 PM To: Elecraft Email; Gary Elecraft Subject: [Elecraft] K3 Power Problem ?? Hi Folks, When doing RTTY at 100 watts a high current warning flashes in the VFO B display area and RF power is automatically cut back to about 60 watts. SWR is about 1.1:1 or there abouts; nothing approaching 1.5:1. I have found there is 0.6 volts drop in the Elecraft supplied power cable (Power Poles are soldered) and about 0.2 volt drop between my power supply and the output of the Rigrunner. It's between the power supply and the K3. Voltage at the radio drops to 13.2 vdc and current is 23-24 amps on transmit. Under that load the voltage at the power supply drops 0.01 volts. I run the power supply (it's variable) at 14.0 volts at the supply. It's a 40 amp power supply. I have a popular off shore rig that has no problem with the existing power setup. In reading the Supply/Voltage Current specifications on page eight (8) of the Owners Manual I find it recommends "When using reduced supply voltage (<12volts), power output should be reduced (e.g. 70 W at 11 V). Further, "For best results, use the supplied 5 foot (1.3 m) power cable." Those two statements appear to be in error when applied to my radio. My K3 appears to be overly sensitive to voltage and current. The only adjustment I can locate that might relate to this is the menu CONFIG:ADC REF entry. However, I seriously doubt it will have any impact on this as this appears to be a serious error and adjust appears to be for fine tuning at best. I certainly would appreciate any ones constructive input on this situation. I could appreciate knowing the gauge of the supplied cableI'm hoping that doubling or tripling the size might help. But, that seems to be a bandaide rather that eliminating the root cause. Thank, have a good day and 73. Jim, W0EM __ 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] K3 Power Problem ??
Hi Folks, When doing RTTY at 100 watts a high current warning flashes in the VFO B display area and RF power is automatically cut back to about 60 watts. SWR is about 1.1:1 or there abouts; nothing approaching 1.5:1. I have found there is 0.6 volts drop in the Elecraft supplied power cable (Power Poles are soldered) and about 0.2 volt drop between my power supply and the output of the Rigrunner. It's between the power supply and the K3. Voltage at the radio drops to 13.2 vdc and current is 23-24 amps on transmit. Under that load the voltage at the power supply drops 0.01 volts. I run the power supply (it's variable) at 14.0 volts at the supply. It's a 40 amp power supply. I have a popular off shore rig that has no problem with the existing power setup. In reading the Supply/Voltage Current specifications on page eight (8) of the Owners Manual I find it recommends "When using reduced supply voltage (<12volts), power output should be reduced (e.g. 70 W at 11 V). Further, "For best results, use the supplied 5 foot (1.3 m) power cable." Those two statements appear to be in error when applied to my radio. My K3 appears to be overly sensitive to voltage and current. The only adjustment I can locate that might relate to this is the menu CONFIG:ADC REF entry. However, I seriously doubt it will have any impact on this as this appears to be a serious error and adjust appears to be for fine tuning at best. I certainly would appreciate any ones constructive input on this situation. I could appreciate knowing the gauge of the supplied cableI'm hoping that doubling or tripling the size might help. But, that seems to be a bandaide rather that eliminating the root cause. Thank, have a good day and 73. Jim, W0EM __ 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
