Re: [Flexradio] Flex radios are the worst polluters ??

2014-04-23 Thread Kjeld Bülow Thomsen 
Yes, I first discovered this issue as i red SM5BSZ’s article. But I do care
about my fellow radio amateurs in the neighborhood or across the North Sea.
My 1,5 m dish for 23/13 cm has it 3 dB points between ~150 km over the
London area. By lifted conditions that are very common during spring and
summer time the signals over this distance can easily be up to 80 dB over
the noise floor. So I’m able to pollute the bands in the whole London area
with noise. And there is a lot of weak signal communication going on there.

SM5BSZ has identified the source of the TX-noise and Flexradio has confirmed
this. For the SDR1000 there is an easy fix for this problem by putting a
filter I the cable to the TX-soundcard. 

It should be easy for Flexradio to work out a fix for the 1500/3000/5000.
But they recommend me to buy a new radio. Which I did. And this radio does
not act as a broadband noise source. I hope that there will be a fix as I
want still to use my 1500 on the less used microwave bands. 

A satisfied customer tells his experience to 3 other people. An unsatisfied
customer tells it to 10 other people.

 

Vy 73 de OZ1FF - Kjeld

 

Phone/SMS   +45 4021 1119

Skype   oz1ff-1

 

  mailto:kj...@oz1ff.dk

  http://www.oz1ff.dk

 

 
 Ian Scoble
 Wed, 23 Apr 2014 07:56:26 -0700 

I don’t usually want to get involved in this type of argument but I have
to say for the few contacts that are made on the microwave bands in
comparison to what are usually made on HF
I really don’t see this as an issue also by the fact that you are using
dishes with very small beam widths again it’s a non issue.
You also ran the flex 1500 with no problem until you read the article it
was only then that it came relevant.
 
 
Ian

 

 

 

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Re: [Flexradio] Flex radios are the worst polluters ??

2014-04-23 Thread Kjeld Bülow Thomsen 
The article about broadband noise from the Flex radios was published in the
DUBUS Magazine 3 -2013. I was a long time waiting for a official response
from Flexradio. As nothing happened I contacted Flexradio and got the same
information from Tim Ellison: Yes, we agree upon SM5BSZ’s measurement but
this broadband noise is in our opinion but a practical problem. If it is,
buy a Flex 6000. SM5BSZ has in his article proposed a solution to minimize
the problem, but this seems not to have any interest at Flexradio.

 

I’m an active microwaver. Until I got this message I used 2 Flex 1500 with
transverters and PA’s to 1,3 – 47 GHz. On some bands I use maximum legal
power and dish antennas. Under good propagation conditions I can raise the
noise floor at UK stations 600 km away across the North Sea. That is not OK
even if the radio meets US standard. That’s too bad.

 

This arrogant attitude to the problem has forced me and other microwavers to
go for radios not suffering from this problem, f. ex KX3 or ANAN. My 2 Flex
1500 are now collecting dust on the shelf. 

 

Vy 73 de OZ1FF - Kjeld

 

Phone/SMS   +45 4021 1119

Skype   oz1ff-1

 

  mailto:kj...@oz1ff.dk

  http://www.oz1ff.dk

 

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Re: [Flexradio] Interfacing VHF/UHF and Microwave Transverters to Flex 5000

2013-10-16 Thread Kjeld Bülow Thomsen 
It’s easy to switch transverters from PSDR via DDUtil and a LPT-port. If
such a port is not available, switching can be done via the Flexwire ports
I2C bus. K3TUF makes an interface: http://www.k3tuf.com/FW.html. I use both
solutions to switch transverters via a homebrew switchbox based on two
6-ports SMA relays and DB6NT 144/28 and 432/28 MHz transverter modules.

 

http://www.oz1ff.dk/images/OZ1FF%20Microwave%20Station.pdf

 

Vy 73 de OZ1FF - Kjeld

 

Phone/SMS   +45 4021 1119

Skype   oz1ff-1

 

  mailto:kj...@oz1ff.dk

  http://www.oz1ff.dk

 

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Re: [Flexradio] Flex 1500 with 2m transverter

2012-09-11 Thread Kjeld Bülow Thomsen 
I use Flex-1500 with Kuhne transverters for 1296/2320/5760/10368/24048 MHz
terrestrial work and 10368/24048 MHz EME. Works excellent with only a little
PC maintenance now and then.

 

My terrestrial station setup:
http://www.oz1ff.dk/images/OZ1FF%20Microwave%20Station.pdf.

 

Vy 73 de OZ1FF - Kjeld

 

Phone +45 7352 6050

SMS   +45 4021 1119

Skype   oz1ff-1

 

  mailto:kj...@oz1ff.dk

  http://www.oz1ff.dk

 

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Re: [Flexradio] Flex-1500 spurious when using external reference

2011-04-13 Thread Kjeld Bülow Thomsen 
Hello Graham,

 

Looking on the specs of my Isotemp 134-10 oscillator showed that spurious
attenuation should be >60 dB. Looking at the 10 MHz signal on the 1500
showed a lot of spurii about 60 dB down. In my scrapbox I found a 10 MHz
8-pole quarzfilter. Putting this filter in line with the 10 MHz signal
cleaned it up. I do not have ground loops and the power supplies are clean.
But the 60 dB attenuated +/- 10 kHz spurious are still there when I lock the
1500 to the GPSDO. And they disappear when using the internal reference.

 

Kjeld/OZ1FF

 

Fra: gra...@flex-radio.com [mailto:gra...@flex-radio.com] På vegne af Graham
Haddock
Sendt: 2011-04-13 05:07
Til: Kjeld Bülow Thomsen; FLEXRADIO
Emne: Re: [Flexradio] Flex-1500 spurious when using external reference

 

Kjeld:

Do you have access to another 10 MHz reference that could be substituted and
used
to compare? It does not have to be high accuracy for the comparison test.

I suspect a 10 kHz switching power supply or some other 10 kHz source
associated with your GPSDO as causing the problem.  

You might also try making sure the case of the FLEX-1500 shares a common
ground with the GPSDO.  Do not depend on the shield of the 10 MHz coax,
since
it floats at the FLEX-1500 input, to allow the 1500 to reject ground loop
noise.

--- Graham / KE9H

==

On Tue, Apr 12, 2011 at 10:23 AM, Kjeld Bülow Thomsen  wrote:

I’m using my Flex-1500 with transverters on 1,3 – 24 GHz. The radio and most
of the transverters are locked to a 10 MHz GPS-disciplined oscillator. When
working weak signals there are only very few spurious frequencies. During
the last weeks there has been tropo conditions with signals in the 59 +20-30
dB range. All these signals appeared full of spurious +/- 20 kHz. As all
signals was looking in the same way when exceeding S9 I decided to
investigate the problem.



The pictures on http://www.oz1ff.dk/pages/flexradio.html a screen dump of a
-60 dBm signal on 28,2 MHz from a clean source. Dia1 is with external
reference and shows +/- 10 kHz spurious. Dia2 shows the signal with the 10
MHz reference switched off. Increasing the signal generator level to more
than -40 dBm with 30 dB preamp gain overloads the receiver. But that is as
specified. The level from the external 10 MHz source is +2 dBm and sine
wave.



The external reference is essential for weak signal work. I don’t expect
this to be a software problem. Any suggestions for a solution to this
annoying problem?



Vy 73 de OZ1FF - Kjeld



Phone +45 7352 6050

SMS   +45 4021 1119

Skype   oz1ff-1



 <mailto:kj...@oz1ff.dk> mailto:kj...@oz1ff.dk

 <http://www.oz1ff.dk/> http://www.oz1ff.dk



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[Flexradio] Flex-1500 spurious when using external reference

2011-04-12 Thread Kjeld Bülow Thomsen 
I’m using my Flex-1500 with transverters on 1,3 – 24 GHz. The radio and most
of the transverters are locked to a 10 MHz GPS-disciplined oscillator. When
working weak signals there are only very few spurious frequencies. During
the last weeks there has been tropo conditions with signals in the 59 +20-30
dB range. All these signals appeared full of spurious +/- 20 kHz. As all
signals was looking in the same way when exceeding S9 I decided to
investigate the problem.

 

The pictures on http://www.oz1ff.dk/pages/flexradio.html a screen dump of a
-60 dBm signal on 28,2 MHz from a clean source. Dia1 is with external
reference and shows +/- 10 kHz spurious. Dia2 shows the signal with the 10
MHz reference switched off. Increasing the signal generator level to more
than -40 dBm with 30 dB preamp gain overloads the receiver. But that is as
specified. The level from the external 10 MHz source is +2 dBm and sine
wave.

 

The external reference is essential for weak signal work. I don’t expect
this to be a software problem. Any suggestions for a solution to this
annoying problem?

 

Vy 73 de OZ1FF - Kjeld

 

Phone +45 7352 6050

SMS   +45 4021 1119

Skype   oz1ff-1

 

  mailto:kj...@oz1ff.dk

  http://www.oz1ff.dk

 

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[Flexradio] FLEX-1500 on Acer A1

2011-03-02 Thread Kjeld Bülow Thomsen 
Just downloaded PSDR 2.0.19 RC1 on my Acer Aspire 1 with Intel N270 CPU 1,6
GHz and 1,48 GB RAM. To get 1024x768 resolution on the 8,9” screen I use the
freeware program A1Ctl.

 

Connected the FLEX-1500 to the PC and after some setup changes the radio
runs flawless on the tiny PC. No sound cracks and CW with a straight key at
>20 WPM. CPU runs @60% with panafall and WIFI-card enabled.

 

Amazing!

 

My normal station setup:
http://oz1ff.dk/images/OZ1FF%20Microwave%20Station.pdf.

 

Vy 73 de OZ1FF - Kjeld

 

Phone +45 7352 6050

SMS   +45 4021 1119

Skype   oz1ff-1

 

mailto:oz...@mail.dk

http://www.oz1ff.dk  

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Re: [Flexradio] Best Transverters?

2010-12-28 Thread Kjeld Bülow Thomsen 
Anyone familiar with this one??
 
 
http://www.kuhne-electronic.de/en/products/transverter/tr-144-h-40.html

 

DB6NT , Michael Kuhne makes transverters in excellent workmanship and with
state of the art specifications. Expensive, but you get what you pay for and
with outstanding communication and support. 

 

Vy 73 de OZ1FF – Kjeld

 

QRV 23/13/6/3/1,2cm with DB6NT XVTR’s and FLEX-1500

 

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Re: [Flexradio] QST for FLEX-1500 users having USB driver installation / operational issues

2010-11-22 Thread Kjeld Bülow Thomsen 
Replacing the FLEX-1500.DLL helped getting the radio working with PSDR
2.0.16 on my HP G62 Intel with i3 CPU and W7/64. 

 

Vy 73 de OZ1FF - Kjeld

 

Phone +45 7352 6050

SMS   +45 4021 1119

Skype   oz1ff-1

 

  mailto:oz...@mail.dk

  http://www.oz1ff.dk

 

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[Flexradio] FLEX-1500 es PSDR 2.0.16

2010-11-13 Thread Kjeld Bülow Thomsen 
Has been waiting since the beginning of August for a version of PSDR
supporting XVTR-operation on my FLEX-1500. Installation on my Acer Veritron
dual core 2,3G Pentium, 2 GB RAM with WIN-XP Proff SP3 was easy without any
problems. XVTR-setup is functional so I’m now QRV 23cm>10m, 13cm>2m>10m,
6cm>2m>10m, 3cm>2m>10m, 1,2cm>70cm>10m with most of oscillators and the
FLEX-1500 locked to a GPS-disciplined 10 MHz reference. CW works
satisfactory compared to PSDS 2.0.8. All XVTR’s are DB6NT and they has for
safety reasons their own sequencers, so no need for build-in sequencing. 

 

Tried to install PSDR 2.0.16 on my HP G62 notebook with W7/64, but without
success. 

 

Will during the next weeks gain experience with the setup in  the microwave
activity contests.

 

Vy 73 de OZ1FF - Kjeld

 

  http://www.oz1ff.dk

 

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