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The issue was the macOS Security & Privacy Microphone access not being enabled for WSJTX. Not sure if the update changed the setting but with it enabled we're back working as it should.
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Re: Aggregation of two RX Streams in one Window of WSJT-X
#TechnicalHelpQuestion
Reino, good point about the possible phasing issues.
-- John P. WA2FZW |
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Gary Rogers
Check your audio devices in the Audio Midi Setup to make sure they are correctly configured.
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Gary KO3F On Jan 28, 2022, at 7:31 AM, florida randy <srqcrete@...> wrote: |
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Apple update last evening. Today I can hear FT8 on radio (Yaesu FT991a) but WSJTX shows nothing on the waterfall. Radio Preferences shows Test Cat and Test PTT are working properly.
Ideas? Randy N4TDT |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
d_ziolkowski
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On Fri, Jan 28, 2022 at 8:55 AM Ronnie Hull <w5sum@...> wrote:
Soooo.... 22 meters is now frequency that folks will use FT8 on? Do --
Dan Ziolkowski KC2STA SKCC #4290T Ubuntu LINUX |
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Re: Aggregation of two RX Streams in one Window of WSJT-X
#TechnicalHelpQuestion
Reino Talarmo
Hello Alex,
If you combine audio signals from two independent receivers, then the audio frequencies have a frequency difference or at least an unknown phase difference. I they have a constant 90 degrees phase difference, then the result of the addition of two signals from H- and V-pol antennas is the same as you had used either left or right hand circular polarization. The result could be improvement or weakening of the signal depending on the signal path especially via ionosphere. If the phase difference is 180 degrees, then it is attenuated. If luckily phase difference is zero, then signal will get stronger, but that happens to noise as well. In effect combined antenna polarization is tilted by 45 degrees. When there is a small frequency difference, then all those polarizations just "rotate" in sequence. When there is a larger frequency difference, say 50 Hz, then one signal is decoded twice. But S/N is less as there is additional noise from the "wrong" polarization at each decoded frequency. So end result could be unexpected or at least uncontrolled. 73, Reino OH3mA |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
Not much 😊 and not easy.
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Full text here: https://www.gpo.gov/fdsys/pkg/CFR-2011-title47-vol1/pdf/CFR-2011-title47-vol1-sec15-225.pdf As it is difficult for hobbyists to perform these field strength measurements, W1TAG has done some calculations on the power levels into various antennas which meet this limits. I strongly suggest reading his entire paper, so you are aware of the methods he used, and you can stay within the generous field strength limits for this band. In a nutshell, he calculated that the limits are 4.6 mW into a half wave dipole, or 2.3 mW into a quarter wave ground plane antenna. Assuming 50 ohm loads, these are 0.48 Vrms and 0.34 Vrms respectively. An oscilloscope could be used to measure the output of your beacon, to verify compliance with the regulations. K6STI has also calculated power levels to stay within Part 15 limits for several types of antennas and ground conditions, with somewhat different results: http://ham-radio.com/k6sti/hifer.htm Outlook LT Gil W0MN Hierro Candente Batir de Repente 44.08226 N 92.51265 W EN34rb -----Original Message-----
From: main@WSJTX.groups.io <main@WSJTX.groups.io> On Behalf Of Ronnie Hull Sent: Friday, January 28, 2022 7:55 AM To: main@WSJTX.groups.io Subject: Re: [WSJTX] 22 meters - 13.5539 MHz Soooo.... 22 meters is now frequency that folks will use FT8 on? Do americans have privelges there? Curious about this Ron W5SUM -----Original Message----- From: main@WSJTX.groups.io <main@WSJTX.groups.io> On Behalf Of George Szymanski via groups.io Sent: Friday, January 28, 2022 7:02 AM To: main@wsjtx.groups.io Subject: Re: [WSJTX] 22 meters - 13.5539 MHz Very easy to add any frequency to the list. Settings,,,Frequencies...right click on the list and add 73 de George/DU1GM -- W0MN EN34rb 44.08226 N 92.51265 W Hierro candente, batir de repente HP Laptop |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
Ronnie Hull <w5sum@...>
Soooo.... 22 meters is now frequency that folks will use FT8 on? Do americans have privelges there?
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Curious about this Ron W5SUM -----Original Message-----
From: main@WSJTX.groups.io <main@WSJTX.groups.io> On Behalf Of George Szymanski via groups.io Sent: Friday, January 28, 2022 7:02 AM To: main@wsjtx.groups.io Subject: Re: [WSJTX] 22 meters - 13.5539 MHz Very easy to add any frequency to the list. Settings,,,Frequencies...right click on the list and add 73 de George/DU1GM |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
George Szymanski
Very easy to add any frequency to the list. Settings,,,Frequencies...right click on the list and add
73 de George/DU1GM |
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Re: Aggregation of two RX Streams in one Window of WSJT-X
#TechnicalHelpQuestion
DL1KDA Alex <dl1kda@...>
Hello John,
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I am using two different radios and so two different sound sources. In my special case a flexradio 6600 with virtual audio cards comming from the flex software. I like your idea and want to try this. I think i will have to install another vitual soundcard to mix thoose two sources to one. I never did that. I have VAC so i will start with that. Thanks for your input! vy 73 de Alex, DL1KDA Am 28.01.2022 um 11:31 schrieb Reino Talarmo <reino.talarmo@...>: |
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Re: Aggregation of two RX Streams in one Window of WSJT-X
#TechnicalHelpQuestion
Reino Talarmo
What the H/V players are talking about is decoding two different streams of audio and decoding both streams since they have two antennas receiving.I was wondering if those two streams could be combined into one and if that would have any advantage. Hi Mike and All, With two antennas you could do various combinations of signals or streams and gain in some respect compared to each single antenna. When antennas are at the same spot like most H/V antennas are, you could combine signals for various polarizations such as linear polarization at any angle, left and right handed circular polarizations and any combination of those. We have already the first one implemented in MAP65 for higher frequencies. MAP65 does the job at decoding level before actual detection, I assume. Combination can be done at three levels: - At RF or IF. At RF combination requires variable gains and/or phase shifters. AF IF you need in addition coherent receivers (local oscillators synchronized). - At detection. Simplest is what MAP65 is doing as a minimum. In addition you could potentially do a predetection and then combine results in error correction phase. That solution may work also without a coherent reception. - After message decoding. Simplest to implement as it is just selection based e.g. on the AP level indication. No frequency synchronization needed and only timeslots needs to be the same. I have been experimenting the first one on 20m band using crossed inverted-V antennas. I produced circular polarization by 90 degrees phase shifting one of the dipoles before combining antennas. For comparison I arranged 180 degrees phase shift for handiness change each 30 s intervals. I compared the first half minute S/N values to the second half minute of the same station for right and left handed polarizations. I got differences from more than 20 dB to none (or actually -20 dB). Over all stations at about same azimuth direction average difference was often 10 dB with 7 dB variance. Results were function of azimuth and distance and time of day. At least here in Finland magnetic field orientation is favorable for linear to circular polarization conversion in ionosphere. 73, Reino OH3mA On Thursday, January 27, 2022, 01:29:40 PM CST, SteveO via groups.io <sollmann22@...> wrote: I am curious here... so on receive i can decode more than 20 simultaneous transmissions. Seems feasible to have multiple transmit frequencies in the same TX time slot. Just different state machines to manage each slot. Scenario: * send CQ in one freq slot. * receive multiple responses, say up to five * respond to all five responses on up to five freq slots. * WSJT-x manages the progress of each QSO individually to completion, timeout, or user intervention. * all done with one sound card. Seems like i have heard WSJT-x can already do this. Seems technologically solid. Is this similar to what this thread is about? 73 de KC5NK, Steve |
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Re: Aggregation of two RX Streams in one Window of WSJT-X
#TechnicalHelpQuestion
On Tue, Jan 25, 2022 at 07:07 AM, DL1KDA Alex wrote:
Alex, are you using two separate radios; that wasn't clear from your post, but here's a thought... I have no way to try it, but on the "Audio" tab in the WSJT settings you can select the input as Mono, Left, Right or Both. What happens if you feed the audio from one radio to the Left input and the audio from the other to the Right input and select Both in the drop down box. An alternate approach might be to use a virtual audio cable program set up to mix the two signals. -- John P. WA2FZW |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
alex
Just dial your rig (it must be capable of doing so!).
E.g. FT8 is not frequency dependent, like FM nor SSB is. |
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Re: WSJT Error
#WSJTX_config
Dale Yanz
Thanks Dave
I did find the that my setting in the ACL - API - I had a check in the "WSTJ-X INTERFACE" box. I did uncheck and re-booted all programs ran without the error message popping up. I have made contacts and all seems to be working at this time. 73's Dale KJ6IX |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
Bob K4RCG
And, go into WSJT “settings” and then “frequencies” to add the desired 22m
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“dial” freq. I did the same as I monitor 22m WSPR as well. 73 Bob K4RCG On Thu, Jan 27, 2022 at 16:32 Paul Drahn <pdrahn11@...> wrote:
WSJTX will receive where ever your receiver is tuned to. |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
Paul Drahn
WSJTX will receive where ever your receiver is tuned to.
Paul, KD7HB, CN94 |
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Re: Aggregation of two RX Streams in one Window of WSJT-X
#TechnicalHelpQuestion
SteveO - KC5NK
Thanks Michael and Reino!
I was talking to a local fellow ham and he had talked about it. Now that you both mentioned Fox mode, that clicks with what he was talking about. Sometimes when he travels, he uses that mode on site. I see now, the distinction here, using two antennas does (in my mind now) seem to imply two different sound cards and two receivers/radios. Thanks for your patience, learned something new today…. A good day! 73, Steve Sent from Mail for Windows From: Michael Black via groups.io Sent: Thursday, January 27, 2022 2:54 PM To: main@WSJTX.groups.io Subject: Re: [WSJTX] Aggregation of two RX Streams in one Window of WSJT-X #question No it's not the same thing. What you are talking about is the the Fox mode does where it can transmit in up to 5 slots. Fox still only uses one audio channel for both Rx and Tx.This makes a lot of sense for DXpeditions...not much sense for the regular schmucks like most of us. You lose signal strength when you do multi-slot.For N Slots = 1, 2, 3, 4, and 5 the average power persignal will be down from P0 by about 0, 6, 9.5, 12, and 14 dB, respectively Besides that having many people doing 5 slots would suck all the air out of our meager 3kHz window.So while it's technically possible to allow it's unlikely to meet approval. What the H/V players are talking about is decoding two different streams of audio and decoding both streams since they have two antennas receiving. I was wondering if those two streams could be combined into one and if that would have any advantage. Mike W9MDB On Thursday, January 27, 2022, 01:29:40 PM CST, SteveO via groups.io <sollmann22@...> wrote: I am curious here... so on receive i can decode more than 20 simultaneous transmissions. Seems feasible to have multiple transmit frequencies in the same TX time slot. Just different state machines to manage each slot. Scenario: * send CQ in one freq slot. * receive multiple responses, say up to five * respond to all five responses on up to five freq slots. * WSJT-x manages the progress of each QSO individually to completion, timeout, or user intervention. * all done with one sound card. Seems like i have heard WSJT-x can already do this. Seems technologically solid. Is this similar to what this thread is about? 73 de KC5NK, Steve |
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Re: 22 meters - 13.5539 MHz
#WSJTX_config
Robie - AJ4F
Shannon,
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You did not say what you tried that did not work. My suggestion is to go to Frequencies under the settings tab and add that frequency. Robie AJ4F On Thu, Jan 27, 2022, 2:54 PM <shannon78@...> wrote:
I would like to use WSJT-x to Receive 22 Meters 13.5539, But it won't do |
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Re: Raspberry input level
#raspberryPi
#Icom
Chris VE3NRT
Hi Make,
Are you using AGC on the 7600? For me, it makes a large difference. If signals are 80dB without it, they'll drop to about 40dB with. However, I usually run without AGC and use the attenuator to bring the level down, and if it needs to come down more I use the RF attenuation knob. I believe that it is better to lower the levels at the RF front end than the audio back end. Hopefully you get 80dB only when there are strong signals - not all the time! My IC-7100 has a setting (Set Mode -> Connector -> AF Audio Level) that will adjust the USB audio level output, but I couldn't find the equivalent in the 7600 manual in the same section. I used that it increase the audio level when it was too low, as the default is "50%", whatever that means. 73, Chris |
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shannon78@...
Could you and 22 meter band in hopping schedule and also be able to select both 60 m bands?
Thanks.... |
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