Date   

Re: RF Quiet UPS

vincent
 

I'm also interested in a quiet UPS for radio's

Vincent


Re: RF Quiet UPS

Simon Brown
 

Allan,

 

Does it generate any crud? I’m not worried about fan noise etc., it’ll live in the computer room. It’s the RF that concerns me.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Allan Isaacs
Sent: 01 September 2017 18:22
To: main@SDR-Radio.groups.io
Subject: Re: [SDR-Radio] RF Quiet UPS

 

I’m not sure you’ll find such a thing Simon.

For what it’s worth mine is a Powercool 1500VA currently £86.75 + vat from Spire, runs my monitor/computer/Ethernet Switch/Broadband hub and desk lamp. It’s worked OK several times and once when the batteries failed it let me down but a couple of new batteries and it was OK. Not too noisy until the mains fails.

Allan G3PIY


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Simon Brown
Sent: 01 September 2017 14:52
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] RF Quiet UPS

 

Hi,

 

Can anyone please recommend a UPS which is RF quiet? I have a APC whose square waves generate a lot of crud.

 

Simon Brown, G4ELI
www.sdr-radio.com

 


Airspy HF+ Notification

Simon Brown
 

To get the notifications of this radio which really is coming soon, just subscribe to this group: https://airspy.groups.io/g/hfplus

 

Simon Brown, G4ELI
www.sdr-radio.com

 

 


Re: RF Quiet UPS

Allan Isaacs
 

I’m not sure you’ll find such a thing Simon.

For what it’s worth mine is a Powercool 1500VA currently £86.75 + vat from Spire, runs my monitor/computer/Ethernet Switch/Broadband hub and desk lamp. It’s worked OK several times and once when the batteries failed it let me down but a couple of new batteries and it was OK. Not too noisy until the mains fails.

Allan G3PIY


From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of Simon Brown
Sent: 01 September 2017 14:52
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] RF Quiet UPS

 

Hi,

 

Can anyone please recommend a UPS which is RF quiet? I have a APC whose square waves generate a lot of crud.

 

Simon Brown, G4ELI
www.sdr-radio.com

 


SDR Console V3 and Flex1500

Bernard Malet
 

Dear Simon.
A question which for you is necessarily recurrent but which for me is to ask again.
I have several SDRs: ELAD FDM-S2, Airspy, LimeSDR and now a Flex1500, a great gift from an amateur radio friend.
The Flex1500 works with the latest enhanced version of KE9NS.
Its software, although improved, is unfortunately not as flexible as your software SDR Console V3
Is there a future possibility of finally being able to finally operate the Flex1500, at least in reception, with the best software SDR the Console V3.
This request to allow me to obtain a homogeneity of a single software SDR
Very cordially
Bernard

 


RF Quiet UPS

Simon Brown
 

Hi,

 

Can anyone please recommend a UPS which is RF quiet? I have a APC whose square waves generate a lot of crud.

 

Simon Brown, G4ELI
www.sdr-radio.com

 


Re: Optical-USB cables

Mike N1JEZ
 

Hi Barry,

Yes, there is a powered hub. For us, reliability was key. Isolation is good although in our installation, all the equipment is fed from the same isolated UPS system.

Mike

On 8/31/2017 3:08 PM, Barry Baines wrote:

On Aug 31, 2017, at 10:22 AM, carl.physics <carl.physics@... <mailto:carl.physics@...>> wrote:

The primary advantage is cable length.
Specs indicate it is part 15 fcc compliant. This does not translate to RF insensitive. Although, it could be-requires a test. You cannot charge over this cable. That means your device needs its own power supply.
There is an additional advantage for optical cables as well:  electrical isolation.
A concern we all have is what happens if a lightning strike occurs near the ham shack.  An optical cable will not conduct any of the surge through it, isolating the device being “protected”.  Depending upon the relative risks of lightning causes problems, it may make sense to isolate computers from devices (such as receivers and amplifiers) that may introduce lightning into the shack if the coax lightning protection system (e.g. Polyphasers attached to a ground plate tied to a grounding system) is insufficient to keep all of the energy out of the shack.
It may also help with reducing ground loops since there isn’t any copper/shielding between devices when using optical devices.
FWIW, after my shack in Folkston, GA was impacted by an indirect strike in June 2014 while I was away and I lost computers, an HF amplifier, a Bose audio system, network devices, etc.  I subsequently installed an extensive fiber optic LAN system to 1) isolate my network devices in the ham shack (located in a detached garage) from the LAN in the house, and 2) added additional fiber optics within the shack to isolate expensive networked devices from the LAN, such as my Flex transceiver.  I consider this investment as a form of ‘insurance’ to try to minimize impacts.
The fact that there is now a USB optical cable is very interesting to me since it appears that the bulk of the damage I experienced in Folkston was introduced through a 900 MHz receiver whose discriminator output was fed through a USB device (iMIC) into the computer which in turn provided a conduit through the LAN to impact other devices.  While there is no guarantee that a USB optical cable would have changed the outcome of the ensuing damage, the use of such USB optical cables along with fiber LAN interfaces could potentially mitigate the resulting damage by reducing the number of pathways that a lightning surge could take.
As previously noted, the primary advantage is cable length and Mike, N1JEZ already has shared his comment that he uses such cables to extend 100 ft. the distance between keyboard/mouse and a video system (a distance that as far as I know copper-based USB extenders don’t provide). Mike, I presume that you used a powered hub to power these two devices?
FWIW,
Barry Baines, WD4ASW

Carl K0YCR
--

73,
Mike, N1JEZ
"A closed mouth gathers no feet"


Keyboard shortcut

Mike Richter
 
Edited

What is the keyboard shortcut  for mode USB, LSB FM ... In version sdr Konsole v3 ? In version 2 is m+a for am... In dsp. In Version 3_6 is not possible to allocation shortcut.


Re: Center Spike #hackrf

Rob Ram
 

Hi James,

The spike in the middle is typical for direct conversion receivers.
Happens for analog and SDR digital receivers. It is the imbalance of the
I and Q decoders at the sampling rate frequency; which corresponds to
DC. The actual spike frequency is DC, not the frequency shown of the
spectrum display. This frequency is added later for user convenience .
This can even happen with receivers with auto balance techniques. A
simple workaround is to create a frequency offset so that the DC term is
shifted away from DC. Basically, create an IF frequency and decode the
IF range.

Rob

On 8/31/2017 12:11 PM, James Brown wrote:

Is there any solution for this?

This spike is in the exact center of the spectrum regardless of
tuning, gain settings, mode or anything else.


Re: Optical-USB cables

carl.physics
 

Not sure i see the advantage though of remoting an sdr with an optical usb. A resonant dipole antenna fed with lmr 400 cable sports 90 % efficiency with very little cable loss at hf wavelenghts. Then use a 6" usb cable to connect the sdr to the computer. This is about as good as it gets. Even at uhf the losses arent much worse. Tunable dipoles are possible. An example is the stepir yagi design. If you need more gain on uhf frequencies, then 11 element yagis are appropriate.
Optically remoting the sdr only would improve on the coax loss and not gain you very much. In the ham community, i have heard many times to spend your money on antennas before amplifiers.
Carl K0YCR


Re: Optical-USB cables

Barry Baines
 


On Aug 31, 2017, at 10:22 AM, carl.physics <carl.physics@...> wrote:

The primary advantage is cable length.
Specs indicate it is part 15 fcc compliant. This does not translate to RF insensitive. Although, it could be-requires a test. You cannot charge over this cable. That means your device needs its own power supply. 


There is an additional advantage for optical cables as well:  electrical isolation.

A concern we all have is what happens if a lightning strike occurs near the ham shack.  An optical cable will not conduct any of the surge through it, isolating the device being “protected”.  Depending upon the relative risks of lightning causes problems, it may make sense to isolate computers from devices (such as receivers and amplifiers) that may introduce lightning into the shack if the coax lightning protection system (e.g. Polyphasers attached to a ground plate tied to a grounding system) is insufficient to keep all of the energy out of the shack.   

It may also help with reducing ground loops since there isn’t any copper/shielding between devices when using optical devices.

FWIW, after my shack in Folkston, GA was impacted by an indirect strike in June 2014 while I was away and I lost computers, an HF amplifier, a Bose audio system, network devices, etc.  I subsequently installed an extensive fiber optic LAN system to 1) isolate my network devices in the ham shack (located in a detached garage) from the LAN in the house, and 2) added additional fiber optics within the shack to isolate expensive networked devices from the LAN, such as my Flex transceiver.  I consider this investment as a form of ‘insurance’ to try to minimize impacts.  

The fact that there is now a USB optical cable is very interesting to me since it appears that the bulk of the damage I experienced in Folkston was introduced through a 900 MHz receiver whose discriminator output was fed through a USB device (iMIC) into the computer which in turn provided a conduit through the LAN to impact other devices.  While there is no guarantee that a USB optical cable would have changed the outcome of the ensuing damage, the use of such USB optical cables along with fiber LAN interfaces could potentially mitigate the resulting damage by reducing the number of pathways that a lightning surge could take.  

As previously noted, the primary advantage is cable length and Mike, N1JEZ already has shared his comment that he uses such cables to extend 100 ft. the distance between keyboard/mouse and a video system (a distance that as far as I know copper-based USB extenders don’t provide). Mike, I presume that you used a powered hub to power these two devices?


FWIW,

Barry Baines, WD4ASW

Carl K0YCR
_._,_._,_



Re: Optical-USB cables

Ron Liekens
 

Thanks all for the feedback. Yes i know about not providing power to a device. What I suspect is that possible unwanted qrm can not be coupled trough the cable from the pc to the sdr.

The price is steep thats true. Seems to be a nice way to mount a Airspy in a waterproof box and connect it directly to the antenna and avoid coax loss. This said, with a self powered hub, in this case.

73' Ron - on2ron


Upgrading for CW

Richard Lawn
 

I'm embarrassed to admit that I got stalled over the summer. After having initial great success working the digital modes on my Proficio I wanted to move on to CW operation and in fact was one of the guys who pushed on that development. I gather though that further developments and enhancements were made to promote CW operation. 

Is there a procedure and files posted to make the necessary firmware upgrades to get my radio to the most recent state? I'm a little gunshy of doing this but want to upgrade the radio as I am an old brass pounder and want to use the radio in that way, and may add a little amp. Anyone successfully using those Chinese amps I see on eBay?


73
Rick, W2JAZ


Center Spike #hackrf

 

Is there any solution for this?

This spike is in the exact center of the spectrum regardless of tuning, gain settings, mode or anything else.

The SDR is a HackRF with the latest firmware factory installed.

I don't see this with any of my other SDRs. I don't see this with SDR Sharp and the HackRF.

Using version 3.0 build 843 but I've seen this on every build for a long time.

Running on Windows 10 64 bit.


Re: Recording and Playback in V3 - Suggestions

Mark Pettifor
 

Nice, Bjarne! I like the layout. And my eyes love the increase in font size. :^)

Simon: The analyser looks great also!

Mark


Re: Optical-USB cables

Augusto Battistoni <hb9tza@...>
 

IMHO,FWIW, it is simply too expensive!
I have had and still have good results with USB amplified cables, very cheap in respect to optical ones, that allow me to CAT my station from another room of my apartment.
With that money I could buy another ham rig or some test gear, better that optical cables.
This is my solution, your mileage may vary, of course!
Augusto I2JJR

Il 31/08/2017 16:22, carl.physics ha scritto:

The primary advantage is cable length.
Specs indicate it is part 15 fcc compliant. This does not translate to RF insensitive. Although, it could be-requires a test. You cannot charge over this cable. That means your device needs its own power supply. 
Carl K0YCR


Re: Optical-USB cables

carl.physics
 

The primary advantage is cable length.
Specs indicate it is part 15 fcc compliant. This does not translate to RF insensitive. Although, it could be-requires a test. You cannot charge over this cable. That means your device needs its own power supply. 
Carl K0YCR


Re: Optical-USB cables

Joe Rotello
 

Ron...most all current optical USB cables do not provide power to the device.

IOW, as do the Corning cables, optical cables are meant to be used by self-powered devices only, and the situation is not likely to change any time soon.
Thus, unless the SDR you plan to use optical USB cables with is self / separately elsewhere powered...likely not of any real use for now.

With that said, as Corning mentions: A self-powered USB 3.0/2.0 hub can always be used at the peripheral (B-side) to provide power if desired.

Joe Rotello / Knoxville, TN / USA

 


Re: Can't get licence keys to work in SDR-RADIO-Pro_v2.3b2760

Simon Brown
 

Hi,

 

Remove the licence keys file.

 

Simon Brown, G4ELI
www.sdr-radio.com

 

From: main@SDR-Radio.groups.io [mailto:main@SDR-Radio.groups.io] On Behalf Of vk4cmv
Sent: 31 August 2017 10:37
To: main@SDR-Radio.groups.io
Subject: [SDR-Radio] Can't get licence keys to work in SDR-RADIO-Pro_v2.3b2760

 

I've downloaded the latest Version of V2 (SDR-RADIO-Pro_v2.3b2760) and also the keys in the SDRRadioLicenceKeys file, but the version expires after 5 minutes. With the following attached log. Looks like the keys for 2 components are fine and last til 2018 - but the one for SDR Console seems not to be right.

Does anyone have any ideas?

thanks, Julian


Re: Licence Keys expired in SDR-RADIO-Pro_v2.3b2760

Alan G4ZFQ
 

I've downloaded the latest Version of V2 (SDR-RADIO-Pro_v2.3b2760) and also the keys in the SDRRadioLicenceKeys file,
Julian,

It does say "These kits are licenced until June 1st, 2018, a licence file is not needed." maybe the file is not needed?

73 Alan G4ZFQ

but the version expires
after 5 minutes. With the following attached log. Looks like the keys for 2 components are fine and last til 2018 - but the one for SDR Console seems not to be right.