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Re: looking for non-US keyer chip
Thank you to everyone who replied,
it took some time to follow up on the links and suggestions. It would have suited me well to have found a good compromise keyer kit with enclosure, a real time saver, something basic but with a potentiometer speed adjustment. Fortunately, I think I have parts on hand to build a version of the K3NG, I'd like one with sidetone output to use as a practice oscillator for the bug and straight key. I'm a SKCC member from years ago, but in need of practice before going on air to torture other CW ops :-) Ron VE8RT VE8TEA On Fri, 01 Mar 2024 05:32:21 -0800 "Graham, VE3GTC" <colonelkrypton@...> wrote: Ron, -- Ron VE8RT <ve8rt@...> |
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Re: looking for non-US keyer chip
Ron, I think you are referring to the old Curtis Electro Devices 8043/8044 morse keyer chip ???If so, I have no idea where you might get one these days. |
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Invitation to the AGCW QRP contest on March 09, 2024
Hello,
?
on behalf of the AGCW I hereby invite you to participate in this year's QRP contest.
The contest will take place on Saturday, 09.03.2024 from 14:00 to 20:00 UTC on the bands 80/40/20/15/10 meters.
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The complete rules can be found here:
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The long time period (6 hours) and the 10m-80m bands should allow every participant to?
find their way without stress and by using different propagation conditions,
to make QSOs and have fun.
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QRO participants are also not excluded, in this class there are points for QSO's with VLP/QRP/MP.
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The log upload (Cabrillo V2 or V3, with immediate header and log check) is done via the page:
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It is also possible to upload images.
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The Claimed Scores will be available immediately after the log submission deadline (March 31),
The publication of the Final Scores will also take place promptly after evaluation.
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One point of criticism from some participants was the partial overlap with other contests.
I would therefore like to propose that the QRP contest be moved to the 4th Sat in March from 2025 (i.e. from next year).
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Have fun and success with the contest and 73?
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Tom
DK3DUA |
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Re: #QMX #Finals...did I kill it?
#qmx
Well, no, that was someone else's suggestion...which means it's probably right. I don't know my butt from my elbow on the circuitry, I just followed the instructions on assembling. Good luck sir!
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Re: #QMX #Finals...did I kill it?
#qmx
GIUSEPPE
Thank you very much for the help, I had 6w on 20,17e 15 mt and 5w on 12,11 and 10 mt, I tried to transmit with the qmx connected to an ammeter to measure the absorption, in TX it absorbs 190 mA and RX 90 mA, therefore 100 mA it absorbs when I transmit, I don't know what it could be, according to you I should replace the c510 and c 526 capacitors, I don't know.? Thanks anyway, I'll try PUTTY.? 72 Giuseppe iu8eun Il Ven 1 Mar 2024, 13:18 mordan42 via <mordan42=[email protected]> ha scritto: Good luck Bill! Let us know how it goes, please. I've been putting out 3.5w on 20m and 5.5w everywhere else for 5 months or so of regular operation, so seeing 0.2w really bummed me out ?.? |
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Re: #QMX #Finals...did I kill it?
#qmx
Good luck Bill! Let us know how it goes, please. I've been putting out 3.5w on 20m and 5.5w everywhere else for 5 months or so of regular operation, so seeing 0.2w really bummed me out ?.?
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Re: #QMX #Finals...did I kill it?
#qmx
I think we have different root issues, Giuseppe...I do still have RF coming out, it's just a tiny fraction of what it was.
If you're running a windows OS, go to Start button, Run Program, and type 'putty', then hit run. It should have Putty already on your computer.? Then when it pulls up the window to determine which port you want to access, select 'Serial' then type COM* where * is the number for the comport your QMX registers when plugged into your computer.? I'm not very good at explaining things, and I'm not a computer geek, sorry if this doesn't help. |
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Re: #QMX #Finals...did I kill it?
#qmx
My QMX is reading <.5w on all channels in the Putty diagnostic.? I have a QRP power meter that outputs to my DVM and that showed the QMX at almost 4w on 20m!? Below is the schematic for the QRP power meter.? My cheapo SWR/Power meter shows about the same.? It's a rainy day here in Mobile, AL and I'm gonna reflow all the toroids and transformers.
-- Bill Harbour K4VIB |
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Re: #QMX #Finals...did I kill it?
#qmx
GIUSEPPE
good morning everyone, a similar problem happened to me with the high band qmx, after 10 hours of transmission and in wspr 10 mt, it went from 5W to 0w, the RF no longer comes out, I replaced the bs170 mosfets and nothing has changed , how can I access PUTTY to control the qmx, I don't know how to do it.? Thanks 73 Giuseppe iu8eun Il Ven 1 Mar 2024, 13:00 mordan42 via <mordan42=[email protected]> ha scritto: On Fri, Mar 1, 2024 at 05:49 AM, John Z wrote: |
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Re: #QMX #Finals...did I kill it?
#qmx
On Fri, Mar 1, 2024 at 05:49 AM, John Z wrote:
?Yes, I can. I'll do that Sunday or Monday morning and post the results here (at work today, usher in a wedding tomorrow morning). The diagnostics on Putty were showing 0.2 watts, and the Kenwood AT-230 was showing about a quarter watt. I know signal was getting out because this was first observed during a JS8 heartbeat signal which received acknowledgements from the Southeast and Midwest states, even with the tiny power... |
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Re: #QMX #Finals...did I kill it?
#qmx
OK. How are you measuring output power? Can you measure current drawn from the power supply while transmitting? On Fri, Mar 1, 2024, 5:18?AM mordan42 via <mordan42=[email protected]> wrote: Receive looks okay. Waterfall was showing incoming FT8 signals. I'll check anyway, thanks! |
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Re: #QMX #Finals...did I kill it?
#qmx
Receive looks okay. Waterfall was showing incoming FT8 signals. I'll check anyway, thanks!
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Re: #qdxm QDX-M - new single-band version of QDX available
#qdxm
Hi,
I made my mono a dual band QMX-M: 12m and 10m. I have set my QMX-M for High bands instead for Mono band so I got settings for all 5 bands from 20m to 10m in the setup menu.? I suppose you could do the same also for the low band version and than adjust the parameters to your needs. -- 73 Bojan S53DZ |
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Re: #QMX #Finals...did I kill it?
#qmx
Mordan42,
Hans sells BS170s in his component area: Those would be the same as the ones supplied with the kit.?? 73 Evan AC9TU |
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High insertion loss / early rolloff 6m LPF
I've assembled and tested the LPF kit from 160m to 6m. All the filters work as expected without adjustment except 6m. The 6m filter starts to roll off very early and has a high loss in the 6m band (over 4db at 52Hz).? I've checked for solder bridges and cold joints, continuity is good through the inductors and all the pads that should be connected. I can't find any shorts anywhere. Any thoughts? - Justin, AI6YM |
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Re: #qdxm QDX-M - new single-band version of QDX available
#qdxm
Hello Nate? The QDX-M firmware displays only a single entry in the Band Configuration screen. The single entry is configured automatically by the firmware for the band you choose to build the kit for, controlled by your choice of jumper wires (install following the instructions in the assembly manual).? The firmware doesn't have defaults set up yet for all those other bands. So you would need to set up the band you want, manually, in the terminal.? 73 Hans G0UPL |
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Re: QMX Band Pass Filter (and Band pass filters in general) question
Hans ,? Jonathan says? -? "I am not even sure if a single resonant band pass filter is the best option for my use.." |
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Re: #QMX #Finals...did I kill it?
#qmx
Mordan42, How is it doing on receive? Check C510 and C526 to see if they are damaged. If either have cracked or have been overstressed by high RF current, output power will be very low. JZ KJ4A? On Thu, Feb 29, 2024, 10:24?PM Ham Radio <bernard.murphy@...> wrote: Digikey has BS17s in stock ?for 0.59 each.? Buy 10 and you will have spares … |
Timothy Fidler
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