I believe the problem is that the sensing section shares the same PC board with active electronics. There is a still image of the sensing board in the video, and that shows that there's no real isolation between the sensing circuitry (RF in and out) and the active electronics. The sensing section should be really completely separate and shielded, with only the DC Voltages representing forward and reverse power coming out of that shielded section ... preferably via feedthrough capacitors. Thanks Tony for confirming that it wasn't just my meter which had a problem.
Yes a shame indeed, maybe if you shield the display and maybe encase the RF-part .. but i was not going to risk that. And on top i am mostly using the Daiwa's they are great!
Spijtig dit te moeten lezen, ik had dezez video nog niet gezien. Na het bekijken van de eerste video over deze meter heb ik hem gisteren nog besteld, vanmorgen tref ik deze video aan... iets te snel beslist vrees ik. Ik ga proberen te annuleren of te retourneren. 73 van Philippe ON4VP
Het is zeker spijtig.. de meter leek zo goed op de oudere FT-450 , na dat de video een tijd geplaatst is, kwamen er steeds meer meldingen van kijkers die er niet zo blij mee waren. ik lees altijd alle comments en ben toen op mijn veel gevoeligere FT-dx10 gaan kijken met de spectrum scope, toen kwam ook bij mij dit naar boven. uiteraard zsm een nieuwe video gemaakt in de hoop mensen te kunnen behoeden.Tevens is deze nieuwe video met het probleem gekoppeld aan de oude video in het eindscherm, om precies dit te voorkomen. ik hoop dat je kan annuleren, vaak kan je via Ali gratis terug sturen, dat zou ook nog een optie zijn. suc6! 73 Tony PE1ONS
I purchased a model CQV-SWR-508 on Banggood and this meter inserted bad noise into the signal. I am fighting with them right now to return it and get my money back as it was bad out of the box.
i hope they compensate you correctly. BangUgood is not the best in support on broken stuff... usulay they give you 40% and you take it becouse sending back cost you a fortune.. thay are bad.
Ah! Good pick-up! This raises the question about the other digital SWR meter you tested in TA-0307: Mini 100 Watt SWR PWR with OLED and Battery BG5CQV - CQV-SWR120? Does this little unit also generate QRM at some random frequencies I wonder? I purchased a similar unit not long ago from Surecom (model SW-28, 1.5 - 60MHz VSWR & 120 Power meter, with battery) and it is even smaller than the CQV-SWR120 with same functionality with programmable alarm etc. I've not had a chance to use it yet as I'm in the process of restoring and re-aligning a Yeasu FT-902D, but I do have a Icom IC-R71E (general coverage HF receiver) I fixed and re-aligned recently that is very sensitive and should pick-up any QRM generated by the tiny Surecom. I'll let you know if I find anything with that one if you are interested?
Hi, yes that would be very interesting to know, if you can share after to tested, that would be amazing. R71E is great, the sound is so much warmer than the new SDR devices. Somehow the ear knows its digital and i get tired fast (even my FT-dx10), while on the R70/71 and 751 i can listen a lot longer. The Icom is a keeper!
@@TonyAlbus I'm happy to report that I did not find even the slightest QRM murmur internally generated by the little Surecom SW-28, scanning from 100kHz to 30 MHz, 1 kHz step (took me a while 😄) with the Icom R71E (pre-amp ON, noise floor around 0.05uV (around -133 dBm)) and antenna connection to a 50 Ohm dummy load (MFJ-264). And yes, you are right Tony, the R71 is just fantastic, especially on SSB ... sweet! I have it connected to an audio DSP Timewave DSP-599zx (which is just about as old as the Icom LOL) and the combo's performance is almost as good as the best of todays gear with all their fancy IF level DSPs 😏! Of course I had the DSP disconnected for this test.
Is the problem on battery, USB or both? I probably would have put a loop on my scope & "probed" around and maybe tried some mu shielding/ferrites. But thanx for the update nonetheless. 👍
Thanks, i tested on battery, did not want to inject more switchmode noise from the charger. the usb is to charge and not like a DC plug that it switches over to external power... so its using in both modes the same battery-dc-converter system.
Tested with my tinySA on all HF bands but cannot see any RF noise coming from the SWR meter. Curious what could cause the issue as the SWR is running on a battery, metal shielded and more or less passive components. 73 PH7R
Was later thinking i could have connected it to my SpectrumAnalizer, but i have already send it back. The display does most the active processing, so maybe make a shielding between that and the RF part would make a good difference.
If the noise is around a specific frequency, or at a low frequency the Tiny SA could miss it if it isn't set up to sample a narrow enough frequency step.
i have a cqv-swr-508 and i use it, the only place i have some noise s5 with the meter is on 160 m but it's a band i don't use, all other bands i have no noise. LA2VLA
Do you notice any noise on 10-11-and 12 meter bands? I'd really appreciate if you could check. I'm gonna get together with a couple of my electronics buddies and see if we can come up with a fix. Most likely ALL CHEAP DISPLAY INVERTERS cause noise you can NOT filter out. Hopefully it's not the inverter. I work mostly with music audio equipment and in most cases it's always the damn Chinese displays.
It seems that the display itself creates the noise, so maybe shielding that better will solve some of it. i have send mine back for a refund and am using only my Daiwa crossneedles now. i am done with the fancy stuff. turns out i am too much old school and the needles just work better for my old brain. :)
Hi Karl, that is my GPSDO, lab reference for all my time critical devices. like Frequency counters and Generators. so they are spot on. i have here an very old video about the basics czcams.com/video/zFlobGBxxH0/video.html . but you find more resent videos about it on my channel also if you look for GPSDO gps deciplined oscillator
@TonyAlbus Thanks Tony. I thought your GPS systems lived up near the window, hence my question. I have watched all your BG7TBL-Style equipment videos. All really good!
Great to know some are good! thanks for sharing. It was from 3 viewers and that was the reason i rechecked mine again. On my FT-450 i did not notice, on my more sensitive FT-dx10 it showed.
@@TonyAlbus Tony, upon more stringent testing with my sBitx V3 waterfall I have to agree with you, it is making terrible QRM that I never noticed before. I will make a attempt to stop the QRM or at least reduce it to acceptable level. Thanks for the video.
Tony - spróbuj usunąć problem. Pomyśl co może powodować emisję takich QRM ? Może to jakiś stabilizator lub przetwornica ? Może brakuje gdzieś kondensatora blokującego lub dławika ? Pozdrawiam.
@@TonyAlbus OK Tony, widziałem twój komentarz na Ali. Nie wiedziałem że ten SWR-meter jest taki drogi. Za taką cenę powinien obsługiwać minimum 1kW mocy. Wtedy warto spróbować w jakiś sposób usunąć szkodliwe zakłócenia . Dobrze zrobiłeś że go odesłałeś . Pozdrawiam
Hi, Yes it prob is. receiving signals that go trough the meter are in 0.1 uV and below, i know now, i don't want any processor close by. The box is nicely shielded but the distortion source is inside. If one could not send it back because the return period has ended, it would maybe make sense to try to shield the display/cpu unit. good point, thanks!
I believe the problem is that the sensing section shares the same PC board with active electronics.
There is a still image of the sensing board in the video, and that shows that there's no real isolation between the sensing circuitry (RF in and out) and the active electronics.
The sensing section should be really completely separate and shielded, with only the DC Voltages representing forward and reverse power coming out of that shielded section ... preferably via feedthrough capacitors.
Thanks Tony for confirming that it wasn't just my meter which had a problem.
Thanks! .. with a bit more effort it would have been great
That is a shame Tony as i quite fancied trying one of those myself. Thanks for the video.
Yes a shame indeed, maybe if you shield the display and maybe encase the RF-part .. but i was not going to risk that. And on top i am mostly using the Daiwa's they are great!
Spijtig dit te moeten lezen, ik had dezez video nog niet gezien. Na het bekijken van de eerste video over deze meter heb ik hem gisteren nog besteld, vanmorgen tref ik deze video aan... iets te snel beslist vrees ik. Ik ga proberen te annuleren of te retourneren. 73 van Philippe ON4VP
Het is zeker spijtig.. de meter leek zo goed op de oudere FT-450 , na dat de video een tijd geplaatst is, kwamen er steeds meer meldingen van kijkers die er niet zo blij mee waren. ik lees altijd alle comments en ben toen op mijn veel gevoeligere FT-dx10 gaan kijken met de spectrum scope, toen kwam ook bij mij dit naar boven. uiteraard zsm een nieuwe video gemaakt in de hoop mensen te kunnen behoeden.Tevens is deze nieuwe video met het probleem gekoppeld aan de oude video in het eindscherm, om precies dit te voorkomen. ik hoop dat je kan annuleren, vaak kan je via Ali gratis terug sturen, dat zou ook nog een optie zijn. suc6! 73 Tony PE1ONS
My guess would be that its RF noise coming off the OLED display. They are particularly noisy in most instances and need a good bit of shielding.
Yes all active components are on the display unit, incl the cpu, shielding that would maybe improve it indeed.
most likely the battery/charger and up converter to go from 3.7v to 5v. those things are very noisy and cause this type of swishing noise.
I purchased a model CQV-SWR-508 on Banggood and this meter inserted bad noise into the signal. I am fighting with them right now to return it and get my money back as it was bad out of the box.
i hope they compensate you correctly.
BangUgood is not the best in support on broken stuff... usulay they give you 40% and you take it becouse sending back cost you a fortune.. thay are bad.
Hi,I also noticed disturbances on 27/28 MHz,I think I'll return this instrument
Yes, make sure it is good. it also depents indeed on what frequencies you use it.
Ah! Good pick-up! This raises the question about the other digital SWR meter you tested in TA-0307: Mini 100 Watt SWR PWR with OLED and Battery BG5CQV - CQV-SWR120? Does this little unit also generate QRM at some random frequencies I wonder? I purchased a similar unit not long ago from Surecom (model SW-28, 1.5 - 60MHz VSWR & 120 Power meter, with battery) and it is even smaller than the CQV-SWR120 with same functionality with programmable alarm etc. I've not had a chance to use it yet as I'm in the process of restoring and re-aligning a Yeasu FT-902D, but I do have a Icom IC-R71E (general coverage HF receiver) I fixed and re-aligned recently that is very sensitive and should pick-up any QRM generated by the tiny Surecom. I'll let you know if I find anything with that one if you are interested?
Hi, yes that would be very interesting to know, if you can share after to tested, that would be amazing. R71E is great, the sound is so much warmer than the new SDR devices.
Somehow the ear knows its digital and i get tired fast (even my FT-dx10), while on the R70/71 and 751 i can listen a lot longer. The Icom is a keeper!
@@TonyAlbus I'm happy to report that I did not find even the slightest QRM murmur internally generated by the little Surecom SW-28, scanning from 100kHz to 30 MHz, 1 kHz step (took me a while 😄) with the Icom R71E (pre-amp ON, noise floor around 0.05uV (around -133 dBm)) and antenna connection to a 50 Ohm dummy load (MFJ-264). And yes, you are right Tony, the R71 is just fantastic, especially on SSB ... sweet! I have it connected to an audio DSP Timewave DSP-599zx (which is just about as old as the Icom LOL) and the combo's performance is almost as good as the best of todays gear with all their fancy IF level DSPs 😏! Of course I had the DSP disconnected for this test.
@@j-mlapinno4827 Thanks great, thanks for sharing.. LOL i also have a Timewave on my R71 :) great setup sir!
Is the problem on battery, USB or both? I probably would have put a loop on my scope & "probed" around and maybe tried some mu shielding/ferrites. But thanx for the update nonetheless. 👍
Thanks, i tested on battery, did not want to inject more switchmode noise from the charger. the usb is to charge and not like a DC plug that it switches over to external power... so its using in both modes the same battery-dc-converter system.
Tested with my tinySA on all HF bands but cannot see any RF noise coming from the SWR meter. Curious what could cause the issue as the SWR is running on a battery, metal shielded and more or less passive components. 73 PH7R
Was later thinking i could have connected it to my SpectrumAnalizer, but i have already send it back. The display does most the active processing, so maybe make a shielding between that and the RF part would make a good difference.
If the noise is around a specific frequency, or at a low frequency the Tiny SA could miss it if it isn't set up to sample a narrow enough frequency step.
i have a cqv-swr-508 and i use it, the only place i have some noise s5 with the meter is on 160 m but it's a band i don't use, all other bands i have no noise. LA2VLA
Thanks for sharing, that is great!
Do you notice any noise on 10-11-and 12 meter bands? I'd really appreciate if you could check. I'm gonna get together with a couple of my electronics buddies and see if we can come up with a fix. Most likely ALL CHEAP DISPLAY INVERTERS cause noise you can NOT filter out. Hopefully it's not the inverter. I work mostly with music audio equipment and in most cases it's always the damn Chinese displays.
@@RogerBrenon Not sure i tried... if i did its on video.. i send mine back.. shielding the RF-tab will help a lot i would guess
if it has a battery and charger, get rid of it. Next, run it from a linear supply only.
It seems that the display itself creates the noise, so maybe shielding that better will solve some of it.
i have send mine back for a refund and am using only my Daiwa crossneedles now. i am done with the fancy stuff.
turns out i am too much old school and the needles just work better for my old brain. :)
Tony, what are the 2 x GNSS Message modules attached to your desk? Visible at 1:06.
Thanks
Hi Karl, that is my GPSDO, lab reference for all my time critical devices. like Frequency counters and Generators. so they are spot on. i have here an very old video about the basics czcams.com/video/zFlobGBxxH0/video.html . but you find more resent videos about it on my channel also if you look for GPSDO gps deciplined oscillator
@TonyAlbus Thanks Tony. I thought your GPS systems lived up near the window, hence my question. I have watched all your BG7TBL-Style equipment videos. All really good!
@@karlD1963 Yes...this is in the windows, i managed to fit all this stuff in that place, in the back you can still se a bit of windows frame.
Bypass that charging/USB circuit and give it some clean DC. Maybe that’s all it needs? It sure looks pretty…
Its on his way back... i stick to my needles without any cpu and dc converters.
@@TonyAlbus Respect. Needles are quiet and that's what we need when the coax is going through the box! 73 and thanks for showing us!
Tony, I tried mine on all the same frequencies that you did and I have zero QRM on any frequency. Maybe it's just your unit?
Great to know some are good! thanks for sharing. It was from 3 viewers and that was the reason i rechecked mine again.
On my FT-450 i did not notice, on my more sensitive FT-dx10 it showed.
@@TonyAlbus Tony, upon more stringent testing with my sBitx V3 waterfall I have to agree with you, it is making terrible QRM that I never noticed before. I will make a attempt to stop the QRM or at least reduce it to acceptable level. Thanks for the video.
Tony - spróbuj usunąć problem. Pomyśl co może powodować emisję takich QRM ? Może to jakiś stabilizator lub przetwornica ? Może brakuje gdzieś kondensatora blokującego lub dławika ? Pozdrawiam.
Yes maybe by putting an extra compartment between the display/cpu and the RFtab could make it much better. but i already send it back for refund.
@@TonyAlbus OK Tony, widziałem twój komentarz na Ali. Nie wiedziałem że ten SWR-meter jest taki drogi. Za taką cenę powinien obsługiwać minimum 1kW mocy. Wtedy warto spróbować w jakiś sposób usunąć szkodliwe zakłócenia . Dobrze zrobiłeś że go odesłałeś . Pozdrawiam
@@Radiotechnik Yes i send it back, and have already received a refund... lucky this time
Niks beter als een old school Daiwa
Precies!
Tony, myself not being a RF expert by far, I wonder if that's merely an internal shielding issue?
Hi, Yes it prob is. receiving signals that go trough the meter are in 0.1 uV and below, i know now, i don't want any processor close by. The box is nicely shielded but the distortion source is inside. If one could not send it back because the return period has ended, it would maybe make sense to try to shield the display/cpu unit. good point, thanks!