[Elecraft] Low power on 20M band once ATU is installed
I just built a new K1 and had some problems with the output power. To make a long story short I ended up having to lower the values of R5 and R11... This brought the power levels up on the 40 M band from 1.5 to 6.5 Watts and on the 20 M band from 0.5 to 5.5 Watts. Figured all was well now until I installed the new ATU For some reason my output power on the 20M band into a 50 Ohm dummy load is only around 0.7 Watts now with the ATU installed. If I remove it - it goes back up to normal! Any ideas? Thanks, Michael n2zdb __ 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] K1 Low Power on 20M band once ATU is installed...
I just built a new K1 and had some problems with the output power. To make a long story short I ended up having to lower the values of R5 and R11... This brought the power levels up on the 40 M band from 1.5 to 6.5 Watts and on the 20 M band from 0.5 to 5.5 Watts. Figured all was well now until I installed the new ATU For some reason my output power on the 20M band into a 50 Ohm dummy load is only around 0.7 Watts now with the ATU installed. If I remove it - it goes back up to normal! Any ideas? Thanks, Michael n2zdb __ 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] K1 Low Power on 20M band once ATU is installed...
Still have not figured out what's wrong with my newly built K1 w/ ATU. For some reason everything is fine on the 40 M band but once I switch to 20 M the power output drops way down. On the low part of the band the power output is much higher but still too low. I went thru all the C and L parameters in the ATU menu and checked the TX output power and SWR. Here is what I found: http://n2zdb.com/K1problem20M.jpg Since there are 4 inductors and 5 capacitors what does L0 and C0 represent? Figuring there was a problem with an inductor - I added a short between all the inductors at the relays (pins 3 to 4). This did not make a difference. However when a wire was added to K1 pin 4 to k4 pin 3 the power did come up a couple of Watts. I need an EXPERT to figure this out...does anyone have any ideas? 73's Michael n2zdb __ 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] K1 Low Power on 20M band once ATU is installed...fixed!
Well it is finally fixed. When I went to listen to the signal on my K3 I noticed the frequency was off around 500 Hz or so. Tried to adjust the sidetone pitch and nothing happened - test mode audio was weak and frequency would not change with C13. I moved C13 back and forth a little and the tone came in nice and strong - with a adjustable pitch. Re-installed ATU and now a full 5.5 Watts on 20 Meters using a 3 cell Li-Po (12.2 Vdc)! Looks like a defective C13 or cold solder joint. The owner of this K1 will be happy when he hears this news! 73's Michael n2zdb __ 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] KPA100 unable to get a low null for SWR cal
Usually I can get a SWR null around 10 - 15 mV with the power level at 2W. For some reason I can only adjust it down to around 200 mV into a 50 Ohm dummy load. I have tried changing the diodes and U5 but they did not make a difference. Also rewound T4 using another toroid. Also noticed that when I disconnect the dummy load and transmit at the 2W adj level both FOR and REFL voltages are about the same (TP4 = 1.1Vdc, IC5 pin 7=1.1Vdc)! Shouldn't the VREFL be much higher then the VFWD? Both pots are adj to 27.8 kOhms for power calibration at 2W using a LP-100A. When transmitting 2W into 50 Ohm load (K2 display shows "2.1W 1.4:1") LP-100A shows approx. 2W SWR- 1.05:1 VFWD = 0.822 Vdc (IC5 pin 7) VREFL= 0.173 Vdc (IC5 TP4 ) Why is the K2 showing a much higher SWR then it should be showing? Could there be a problem with U6? I did not build this K2/100 and have found mistakes along the way then trying to get it working properly I can't seem to find any in this area yet though! Anyone have an idea what could be the problem? Thanks, Michael n2zdb __ 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] KPA100 unable to get a low null for SWR cal
Thank you to Don W3FPR who solved my problem! I could not get the swr null lower than 200 mV. Provided trim cap C1 was brown and did not have the minimum capacitance required. I used a Murata green trimmer cap which now allows me to go down to 7.5 mV and the SWR shown on all bands into a dummy load it 1.0:1. The replacement cap from Elecraft is part number E540012 (5 pF to 15 pF white body) which should be used at C1. Michael n2zdb __ 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] KIO3B
Wouldn’t it be nice if current K3 owners who already have the “older” options (KIO3, KSYN, KXV3, KBPF3, etc.) could get these options (newer improved versions) at a discounted price? If you add these up they are not cheap! I myself would like the KIO3B, KSYN3A, KXV3A, KBPF3A (I think the current one can be modified), and have already spent a lot for the older versions (If I would have known I would have waited on some)! Michael n2zdb __ 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] Does your KDVR3 for the K3 work with the internal K144XV?
I have the K144XV 2M module installed in my K3 and for some reason I cannot record the FM repeater activity using the KDVR3 voice recorder. In this mode it has never worked. Is this normal and a known problem? The recorder icon shows it is recording but when I go to play it back "END" just comes up and nothing happens Now if I turn my K3 to lets say the 10M band and try to play it also just shows "END". However re-booting my K3 and recording 5 seconds (for ex on 10M)than playing it back actually has some of the 2M recording along with other previous recordings. Also switching to 2M and doing a playback now also works...although not all of the 2M recording is there. Strange? Thanks, Michael, n2zdb __ 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] New Elecraft K2/100 #7556 is on the air!
Just built a new K2 for Mike C in NevadaK2/100 Serial #7556! One of the first contacts was with an airplane up at 30,000 feet headed my way to North Carolina (10 Meters/ QRP)! 73's Michael n2zdb http://n2zdb.com/n2zdb __ 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] For Sale: KXV3A RX Ant, IF Out, and Xverter Interface
Just upgraded my K3 to the new KXV3B and have a like new KXV3A for sale for $85 shipped anywhere in the USA via USPS Priority Mail. Includes: KXV3a assembly, TMP cable, back panel insert, hardware kit, and installation instructions. This is all the stuff you get when you buy this upgrade from Elecraft. This KXV3A was bought new from Elecraft in late 2011 and cost me $120. I also will sell the original KSYN3 synthesizer board if anyone would like a spare (just upgraded it too -to the latest version (make an offer), and the 3 board set of the original KIO3 (with RS232 interface) as that too was upgraded. Please contact me at n2...@aol.com if you are interested in purchasing. 73's Michael, n2zdb __ 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] FLDIGI microphone level changes to 0
Last night I noticed that I had no audio input on my waterfall for FLDIGI. For some reason the recording microphone input level is automatically switching to zero after a few seconds and I can't figure out why? Windows 10 Home Edition FLDIGI 3.23.15 (an older version did the same) I have the new KIO3B using the USB connection to my computer. Does anyone know how to fix this? Thank you, Michael n2zdb __ 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] Sync AM and checking VFO accuracy using WWV
If I set my K3's VFO to WWV at 5.00 MHz with AM-S onand I adjust "REF CAL" to a number where my VFO's frequency readout is exact or near this number +/- maybe a Hertz or two. Is this an accurate way to calibrate my K3? It seems to be very accurate as far as I can tell. Has anyone used this method? Michael N2ZDB __ 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] Bob Friess email address
Can anyone send me his email address to n2...@aol.com? I have some questions on K144XV receiver distortion. Thanks, Michael n2zdb __ 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] Bob Friess email address
Thank you Matt! I just heard from Bob minutes after sending him an email 73's Michael n2zdb __ 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] New KSYN3a installed and not working / recognized
I just installed the new KSYN3a and when I turn on my K3/100/2M rig it does not seem to recognize the board. With "TECHMD ON" and pressing the display button and rotating VFO B knob I do not see SYN1 in the VFO B part of the display! Also there is no LED light coming on - on the KSYN3a board at all. Anyone have a quick fix or is my board defective? Thank you, Michael n2zdb __ 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] New KSYN3a installed and not working / recognized
Well I just pulled out the KSYN3a board a few times to reseat it. Still no LED light on However when I disconnect the REF IN coax from the KSYN3a to my K144XV module the LED comes on and shows a good KSYN1 OK in the VFO B display So now what is causing the problem??? Something else I forgot to do? Michael, n2zdb In a message dated 10/08/2016 4:44:32 P.M. Eastern Daylight Time, donw...@embarqmail.com writes: Michael, Check and recheck the plugging of the TMP cables. Make sure the TMP connectors are fully seated. The cables must match that shown in Figure 12 on page 16 of the installation instructions. Did you exit the menu after turning Tech Mode on? If not, you need to do that and try again. If no luck, contact Elecraft support for additional help and resolution. 73, Don W3FPR On 10/8/2016 4:18 PM, Michael via Elecraft wrote: > I just installed the new KSYN3a and when I turn on my K3/100/2M rig it does > not seem > to recognize the board. With "TECHMD ON" and pressing the display button > and rotating VFO B knob I > do not see SYN1 in the VFO B part of the display! > > Also there is no LED light coming on - on the KSYN3a board at all. > __ 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] New KSYN3a installed and not working / recognized
Any chance that my K3 needs the KREF3 Output Level Modification to increase drive to the KSYN3a? I asked for this kit and have it on hand Michael n2zdb In a message dated 10/08/2016 5:22:18 P.M. Eastern Daylight Time, k2av@gmail.com writes: Hi Michael, To be fully seated, the "wings" on the plugs must be right down against the "collar" on the socket. Having one of those TMP cable ends not fully seated in the socket is a very common malaise, sometimes with an intermittent contact, which is really fun to chase. When it's right, there won't be even 1/16 inch between the wings and the collar. Good Luck & 73 Guy , K2AV On Sat, Oct 8, 2016 at 4:44 PM, Don Wilhelm wrote: Michael, Check and recheck the plugging of the TMP cables. Make sure the TMP connectors are fully seated. The cables must match that shown in Figure 12 on page 16 of the installation instructions. Did you exit the menu after turning Tech Mode on? If not, you need to do that and try again. If no luck, contact Elecraft support for additional help and resolution. 73, Don W3FPR On 10/8/2016 4:18 PM, Michael via Elecraft wrote: I just installed the new KSYN3a and when I turn on my K3/100/2M rig it does not seem to recognize the board. With "TECHMD ON" and pressing the display button and rotating VFO B knob I do not see SYN1 in the VFO B part of the display! Also there is no LED light coming on - on the KSYN3a board at all. __ Elecraft mailing list Home: _http://mailman.qth.net/mailmanhttp://mailman.qth_ (http://mailman.qth.net/mailman/listinfo/elecraft) Help: _http://mailman.qth.net/mmfaq.hht_ (http://mailman.qth.net/mmfaq.htm) Post: mailto:elecr...@mailman.qth.nee This list hosted by: _http://www.qsl.net_ (http://www.qsl.net/) Please help support this email list: http://www.qsl.net/donate.html Message delivered to k2av@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] New KSYN3a installed and not working / recognized
My KREF3 board needed R12 to be changed from 150 to 51 Ohms, even though I only have the K144XV option and not also the sub receiver. Problem fixed! Michael n2zdb In a message dated 10/08/2016 4:44:32 P.M. Eastern Daylight Time, donw...@embarqmail.com writes: Michael, Check and recheck the plugging of the TMP cables. Make sure the TMP connectors are fully seated. The cables must match that shown in Figure 12 on page 16 of the installation instructions. Did you exit the menu after turning Tech Mode on? If not, you need to do that and try again. If no luck, contact Elecraft support for additional help and resolution. 73, Don W3FPR On 10/8/2016 4:18 PM, Michael via Elecraft wrote: > I just installed the new KSYN3a and when I turn on my K3/100/2M rig it does > not seem > to recognize the board. With "TECHMD ON" and pressing the display button > and rotating VFO B knob I > do not see SYN1 in the VFO B part of the display! > > Also there is no LED light coming on - on the KSYN3a board at all. > __ 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] W2 Wattmeter 440 band accuracy?
I just purchased a new Yaesu digital handheld and the power level on the 440 band is low (2.8 v 5.0 Watts), and was wondering if I can trust the W2's accuracy? Another mobile higher powered transceiver also reads low on all power levels on the 440 band. I built the kit version of the W2 and have the VHF/UHF coupler Why is there a +/- calibration button on the PC interface if the unit is calibrated properly? I can send my HT back to be tested and exchanged if it isn't making specs but don't want to be told that my wattmeter reading was inaccurate! 73's Michael n2zdb __ 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] W2 Wattmeter 440 band accuracy?
Measurement is in analog mode.should have made that clear or not even mentioned a digital radio! Michael __ 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] W2 Wattmeter 440 band accuracy?
OK so I am trying to measure around 5 Watts or so on the W2's 20 Watt scale. The spec's for the W2 directional couplers are listed at 0.5 dB accuracy. Is this anywhere or just at full scale? How much could it be off at only 25% of full scale? Trying to decide if the 2.8 Watts I am reading at 440 MHz on high power is too low with a spec of 5 Watts output! If it is I can send it back to the place of purchase to be checked and exchanged if necessary. There seems to be no problem on the 2 Meter band at only 25 % of scale (5 Watts) readingjust on 440. Michael n2zdb In a message dated 07/30/2017 12:36:49 P.M. Eastern Daylight Time, elecraftcov...@gmail.com writes: The accuracy of a Bird Model 43 is +/- 5% of full scale. The meter scale is not linear and produces the best read accuracy in the bottom portion of the meter's scale. There are numerous watt meters on the market today that are more accurate. FWIW 73! Ken Kopp - K0PP -- On Sun, Jul 30, 2017 at 9:23 AM, Michael Walker wrote: The only way to get the answer you wish is to compare it to a bench standard like a bird watt meter. Beyond that you are just guessing. Sorry Mike va3mw On Sun, Jul 30, 2017 at 11:18 AM, Michael via Elecraft < elecraft@mailman.qth.net> wrote: > Measurement is in analog mode.should have made that clear or not even > mentioned a digital radio! > > Michael __ 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
