Date   

CAT COM for several program #sdrplay #sdrconsole

Borut Gaberscek
 

HI to all.

I have microham interface with two cat ports....running log program and sdr console with sdrplay and Omnirig. I have also VSPE program.

My question.....how to create another CAT com port? I'd like to run 3rd program. Splinting one of the interface COM doesn't work with VSPE.

Any idea?

Regard,

Borut


Re: Shack Design for EMI/RFI Reduction

W1RS
 

On Thu, Aug 30, 2018 at 04:45 AM, Gert Gremmen wrote:
FWIW - Regarding the comment: Try to avoid USB completely. It is unbalanced, fast and therefore contains too much harmonics....

USB data physical layer is balanced. 
Electrical specification:

USB signals are transmitted using differential signaling on a twisted-pair data cable with 90 Ω ± 15% characteristic impedance.[69]

    Low-speed (LS) and Full-speed (FS) modes use a single data pair, labelled D+ and D−, in half-duplex. Transmitted signal levels are 0.0–0.3 V for logical low, and 2.8–3.6 V for logical high level. The signal lines are not terminated.
    High-speed (HS) mode uses the same wire pair, but with different electrical conventions. Lower signal voltages of −10 to 10 mV for low and 360 to 440 mV for logical high level, and termination of 45 Ω to ground or 90 Ω differential to match the data cable impedance.
    SuperSpeed (SS) adds two additional pairs of shielded twisted wire (and new, mostly compatible expanded connectors). These are dedicated to full-duplex SuperSpeed operation. The half-duplex lines are still used for configuration.
    SuperSpeed+ (SS+) uses increased data rate (Gen 2x1 mode) and/or the additional lane in the Type-C connector (Gen 1x2 and Gen 2x2 mode).

Also, I agree that there will be significant RFI from neighbors.  Your whole shack can be clean but it is probably out of your control to nail down external RFI sources altogether.  This is a bigger problem in a densely populated area.


Freezing at Start up

Brent Mcl
 

Had stopped using SDR console Do to Freeze up on start up now fixed for me any ways .In program  option at bottom of page the box marked Priority was checked i uncheck the box today restarted program a dozen time works fine now ...........


Re: Automobile Cell Phone Charger RFI (final)

manxmat1
 

I have tried a few different types of 12v 'plug-in' USB chargers, I have an old two port one that seems to work very well without causing any RFI, I do have a couple of other types (hardwired for my camper - it comes as a plate with a small volt-meter, 12v socket and twin USB charger) that almost instantly wipe out FM radio when in use.

I haven't tried ferrites on the positive and negative power lead to these to see if this makes a difference, I just think the switching in these is very bad.

Matty
MD0MAN

Sent from Outlook


Re: Automobile Cell Phone Charger RFI (final)

Joe Puma
 

Maybe as an option one could wire a 12v dc filter to the cig plug before the usb. Maybe it will isolate the interference from getting into the radio. I have a nice big 20amp radio shack one from years back in the stash. Might give it a try. 

Joe
KD2NFC 





On Aug 31, 2018, at 8:14 PM, doug <dmcgarrett@...> wrote:


On 08/31/2018 04:50 PM, Joe Puma wrote:
Hi Doug,

Yes were talking about the same thing, not the 115V usb square (apple) or what ever usb ac adapter you might have. Plus I meant that its a great use to use a SDR radio on a laptop around the car to check for RFI. but having a SDR installed in the car is nice idea too :). 

I have these nice little 5v usb adapters for the 12V lighter plug and anytime I use them it takes out my radio in the car. Heck, now that I am thinking about it, I have a terrible problem with my car remote which operates around 300mhz, I'm wondering if the adapters are the culpret. The phone has to be plugged in charging for a load to be put on them for them to work. Without phone attached and charging the car radio is fine.  Either way using a SDR and Console around the car to troubleshoot is a great idea, you can use a little yagi to direct your reception. 


Joe,
kd2nfc

I surrender! I suppose I should have started my testing in the car. Joe and crew are correct! The adapter DOES create interference on the FM band. I am going to try and find out why, which means
that I will have to crack open the shell and find out what's inside. Probably will not be able to put it back together with whatever fix is required, but I hope I'll figure out what's causing the noise.
I do know that it does not seem to make a significant difference whether the phone is plugged into the cable or whether the cable is plugged into the adapter. (Of course, the socket in the car
is not rated for an actual cigarette lighter; you're not supposed to smoke anymore!) I tried ferrites on both ends of the charging cable without result. Apparently the noise is getting back into
the car's wiring and radiating into the radio from there.

Well, I sawed the housing apart, and sure enough, there's a little oscillator circuit inside, with a tiny coil, several SMD resistors and capacitors, and a chip from CHN, (China Semiconductor),
marked HC8816 and T746. I can't find HC8816 in a quick search, but it is obviously the oscillator/regulator device.

A crude and clumsy fix would be to obtain a lighter plug with no electronics inside, and a lighter socket with no electronic inside, and wire them together with ferrites on the wires, and some
decent capacitors across the wires at the input and output sides--around 47 pF would probably be a good starting point. It would then probably be necessary to put ferrites around the
cable to the phone and the SDR input wires, right at the USB outputs. You would obviously need to shield and filter this contraption. If I am going to ever try and solve the problem for my
own use, I would just build a linear regulator with a 7805 and, if necessary, a pass transistor, and the necessary bypass and filter caps on a little board, put it in a little box with a lighter plug
on one end and one or two USB jacks on the other. If you are going to want to run your SDR from the car, you will need to do something like this. If you just want to charge your phone,
do it while you're having dinner, or something, assuming the lighter socket is still alive when the key is turned off. Or just remember to charge your phone at home!




On Aug 31, 2018, at 2:05 PM, doug <dmcgarrett@...> wrote:


On 08/31/2018 01:42 PM, Joe Puma wrote:
I haven’t seen a usb charger that didn’t take out my radio in my BMW X5. Great idea to use a SDR and console in the car. I may take a look at my situation but does anyone recommend a usb charger that is clean. I found some nice flush one that don’t pop out of the cigg lighter power, too bad the buggers are noisy. 


Joe
KD2NFC 


Joe, If you notice my first message in the thread, you'll note that I am using ONLY the charging cord supplied with the phone, NOT the 115VAC charger. You don't need that. What you need is a charger
CORD that has a USB male plug on one end, and a mini plug on the other that fits the phone charge jack, AND a USB adapter for your lighter socket that puts out 5VDC. The one that I have tested is described
fully in my FOLLOWUP message in this thread. In this case, there is no device that is creating RFI. I can't say where I bought the lighter adapter plug, but most likely Amazon. The adapter comes either in white or black. Since the adapter puts out 5VDC, and has two USB outlets, for a total current rating of 3.1 amps, I'm pretty sure your SDR could plug into the other port.

doug, WA2SAY


On Aug 31, 2018, at 1:32 PM, doug <dmcgarrett@...> wrote:


On 08/31/2018 12:27 PM, doug wrote:


>
> I have a 4 port charger that makes listening to FM barely hearable and totally wipes out AM. I had never thought of using SDRC to track it down.
>

>
> 73 Rick N2AMG
I am sort of surprised that your device contains a switcher when all you need is 5 Volts DC from a 12 to 15 volt cigarette lighter socket. I would put a 5V series regulator in the charging device and it
would make no RFI at all. Perhaps there is one made like that. I have a two-port lighter plug with USB jacks on it. I will take a look and see if it generates RFI. And my phone came with a separate
charging cord compatible with a USB jack, which the AC charger has on it. (And IT is a switcher of course, sind it plugs into
In the meantime, Does the device you have have a built-in charging cord that goes to the phone, or do you use a separate USB to phone cable? If it's a separate cable, then disconnect it and see
if the RFI goes away sufficiently to listen to the radio. If it does, then get some ferrite snap-on RF chokes and run the charging cord thru about three of them right next to the lighter socket.
If that doesn't work, you will have to find a charger made with that series regulator.




Re: Stuttering

Simon Brown
 

OK,

 

Then somewhere there’s a network setting we must change. I’m not working on SDR this weekend, I’ll think about this tomorrow or Tuesday.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Colin Snow
Sent: 02 September 2018 20:15
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Stuttering

 

I tried all the bandwidths. Some of the lower ones don't start the streaming. All that do stream stutter. 

FWIW, I tested and can run Perseus Server (v5) at 250 or 500 KHz without any stutter to clients.


Re: Build 1234 - Cloud-IQ - Antenna switching no longer working

Simon Brown
 

Thanks,

 

I would also be having issues with my NetSDR which I use all the time (same interface code). The Logfile & Screenshot will show me more, maybe computer issues…

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Barry Jablonski
Sent: 02 September 2018 18:47
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Build 1234 - Cloud-IQ - Antenna switching no longer working

 

Also, no Cloud-IQ problems with build 1245.

Barry
WB2ZXJ


Re: Stuttering

Colin Snow
 

I tried all the bandwidths. Some of the lower ones don't start the streaming. All that do stream stutter. 

FWIW, I tested and can run Perseus Server (v5) at 250 or 500 KHz without any stutter to clients.


Re: NOAA satellite reception

Siegfried Jackstien
 

I use a home brewed qfh for the Leo birds
Works suberb
Just some wodden spreaders and two stiff wires... Easy... Cheap... But works
DG9BFC
SIGI

Am 01.09.2018 15:45 schrieb "Steve via Groups.Io" <kc8lqv@...>:

What kind of an antenna are you using????

Is it a circularly polarized one?????

Steve


Re: Build 1234 - Cloud-IQ - Antenna switching no longer working

Barry Jablonski
 

Also, no Cloud-IQ problems with build 1245.

Barry
WB2ZXJ


Re: Build 1234 - Cloud-IQ - Antenna switching no longer working

Bjarne Mjelde
 

Just "for the record", I haven't had any Cloud-IQ antenna selector problems with any build, although I can't say for sure if I have run build 1234. Currently I use build 1243, no problems, except I think the update "forgot" the Ant1 setting from the previous version, so it started with "Auto".
--
Bjarne Mjelde
arcticdx.blogspot.com
Remote rx: kongsdr.proxy.kiwisdr.com:8073/


Re: Build 1234 - Cloud-IQ - Antenna switching no longer working

Simon Brown
 

Hi,

 

I need to see the logfile and a screenshot.

 

  1. Start the Cloud-IQ.
  2. Make sure the ribbon bar, Home panel is visible.
  3. Go to https://www.sdr-radio.com/Support and follow Logfile and Screenshot:
    1. https://www.sdr-radio.com/Support#Logfile
    2. https://www.sdr-radio.com/Support#Screenshot
  4. Attach to a reply. I’m sure I can fix this with the logfile & screenshot.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Jochen Richert
Sent: 02 September 2018 10:46
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Build 1234 - Cloud-IQ - Antenna switching no longer working

 

Dear Simon
After Upgrading to Build 1234 I can no longer select the Antenna input or gain of my Cloud-IQ.

Another strange behaviour. After running SDR-Radio SW, I have no longer access to my radio via SpectraVue.

Many thanks fo any advice
Jochen, HB9DRT


Build 1234 - Cloud-IQ - Antenna switching no longer working

Jochen Richert
 

Dear Simon
After Upgrading to Build 1234 I can no longer select the Antenna input or gain of my Cloud-IQ.

Another strange behaviour. After running SDR-Radio SW, I have no longer access to my radio via SpectraVue.

Many thanks fo any advice
Jochen, HB9DRT


Re: Automobile Cell Phone Charger RFI

Dennis Smith
 

Many chargers for mobile phones have sensing circuitry and a data circuit to charge at full speed, without the corrected signal the phone will not allow a charge over a small amount, the signal needed for Apple devices is different from many Android devices as far as I am to establish. this is why some multi-port chargers often have ports specifically for indicated for Apple devices and Android devices, often appearing to perform poorly when the wrong port is used. I have in one example an Android phone that will 2/3 charge in 10-15 minutes from nearly dead and fully charge in 30 minutes from a good quality fast charger, but my 90W 6-way charger with ports marked Apple and Android and one specifically marked for Samsung/Huawei, that on certain ports doesn't charge anywhere as quick except from one port, however my GF who has loads of Apple devices finds the same port doesn't charge her phones at all, but the others do. (the port that doesn't charge is supplying current, but only enough to keep her phone powered neither using the battery power, nor charging it.

The switching circuits in good quality chargers are often regulating the drawn current and helping to prevent overcharging causing either phone damage or worse an explosive fire. So just regulating the voltage and making several Amps available to the phone to use when and if needed, just won't work as you might expect. 

So, making a power supply for a mobile phone to drop 12V to 5V might work for older phones quite well, a newer phone will charge at a less than optimal speed.

Dennis Smith
M1DLG


On Fri, 31 Aug 2018 at 00:19, doug <dmcgarrett@...> wrote:

On 08/30/2018 03:21 PM, Rick Ellison wrote:

I have a 4 port charger that makes listening to FM barely hearable and totally wipes out AM. I had never thought of using SDRC to track it down.

 

73 Rick N2AMG

I am sort of surprised that your device contains a switcher when all you need is 5 Volts DC from a 12 to 15 volt cigarette lighter socket. I would put a 5V series regulator in the charging device and it
would make no RFI at all. Perhaps there is one made like that. I have a two-port lighter plug with USB jacks on it. I will take a look and see if it generates RFI. And my phone came with a separate
charging cord compatible with a USB jack, which the AC charger has on it. (And IT is a switcher of course, sind it plugs into the houshold AC.)
In the meantime, Does the device you have have a built-in charging cord that goes to the phone, or do you use a separate USB to phone cable? If it's a separate cable, then disconnect it and see
if the RFI goes away sufficiently to listen to the radio. If it does, then get some ferrite snap-on RF chokes and run the charging cord thru about three of them right next to the lighter socket. And you
can wind a coupe of turns of the cord thru each choke.
If that doesn't work, you will have to find a charger made with that series regulator. They are almost certain to exist.

--doug, WA2SAY, retired RF engineer.

 

Am 29.08.2018 um 22:08 schrieb Kriss Kliegle:

Noticed a charger I picked up from one of my favorite electronic surplus sites made listening to FM difficult while charging the phone.
Did some tests on 99.5Mhz with the SDRplay and a 27" (68.6cm) whip located nearby.



Re: NOAA satellite reception

Dave (NK7Z)
 

I am coming in in the middle of this, but if it is the old GOES birds, I use a Discone, and it works very well.

73s and thanks,
Dave (NK7Z/NNR0DC)
https://www.nk7z.net
ARRL Technical Specialist

On 09/01/2018 06:45 AM, Steve via Groups.Io wrote:
What kind of an antenna are you using????
Is it a circularly polarized one?????
Steve


Re: NOAA satellite reception

Steve
 

What kind of an antenna are you using????

Is it a circularly polarized one?????

Steve


Re: Automobile Cell Phone Charger RFI (final)

Kriss Kliegle KA1GJU
 

The LM7805 regulator (any LM78xx for that matter) are 1.5A maximum. I have found even with .5 amp, that 3 pin regulator gets hot as heck. So now your car charger will tun into a car dongle with a massive heat sink, and barely charge the device if it's turned on.

I have two Aukey car chargers from Amazon.com, one a 3 port, the other a four port USB charger. Both are RF quiet on the Am/FM band. I see on Amazon they are not on the site anymore, for these were purchased a few years ago.

One has to buy and try now days with all the poorly made copies of 'real chargers' that are missing filters, over and under voltage protection, etc.

WARNING- Slightly Off Topic but worthy!!!
Here's an eye opening read on Apple Product chargers and the comparison to the fake ones sold:
http://www.righto.com/2014/05/a-look-inside-ipad-chargers-pricey.html


Re: Stuttering

Simon Brown
 

OK,

 

Try a much lower bandwidth first, then increase.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 

From: main@SDR-Radio.groups.io <main@SDR-Radio.groups.io> On Behalf Of Colin Snow
Sent: 31 August 2018 23:31
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] Stuttering

 

Hi Simon

  1. Server bandwidth is 2,000 KHz with compression. Throughput (?) seems to be between 1,000 - 1,500. I'd like to start the Perseus with 250 or 500 KHz. I've tried to start with 192 KHz and sometimes that makes a difference, but not always. I like to start RSP1A in 1 MHz (for BFM) and have tried a start in 150 KHz, but if I move up past 250 KHz stutter comes back - so 200 is max.  
  2. No Wi-Fi
  3. Yes. I tried all IQ Buffer sizes. Makes no difference. All scenarios listed in #1 were at 100 ms.

Colin


Re: Automobile Cell Phone Charger RFI (MORE followup)

doug
 


On 08/31/2018 08:32 PM, Rick Ellison wrote:

The charger is plugged into the 12v socket all the time and by itself I get no interference at all But as soon as I plug the USB cable into any device I have trouble hearing FM and it wipes out AM totally.. I looked at it today to see if it was easy to take apart but its not it is all glued togeather that would break it if I tried to separate it.

 

73 Rick N2AMG

 


You're lucky. When I finally tested the adapter in the car, it interfered with FM whether there was a load connected or not.   --doug, WA2SAY


Re: Shack Design for EMI/RFI Reduction

k6msm@...
 

Quick question.  Is this good enough or do I need much tighter wrapping?  I suppose tighter won't hurt a USB cable like it would coax to the antenna.  Thanks.