10 January 2016

f1award.ru - no plaques, no replies, funds grabbed... Ham radio is not fair-play game anymore?!

Hi all,

maybe you still remember the Ham Formula One awards and plaques activity in 2014. It was perfectly managed on-line and the score as same as reached awards and plaques has been on-line available on the f1award.ru webpage. 


Did You received Your ordered plaques already?! I paid for ordered plaque (wall clock in my case) almost year ago but I never received anything until now. No replies for my several emails to award manager...

https://plus.google.com/100312042524727617304/posts/HvDUFmnsgbR



I tried this link: 
http://www.f1award.ru/orderen/index.php?ukey=order_status&orderID=163&code=aW5kaWFuc0B4c21haWwuY29t
> now it is down...


I tried this: 

http://www.f1award.ru/orderen
> down of course...


Emailed several times to:  

admin@f1award.ru 
> no response.

In MegaLog merchant I was able to find my order 

> now it is down.


I emailed to: Oleg Lebedev; elebedev at gmail at com and he replied to me that he can help me with shipment. The package should be shipped 10/8/2015. Nothing arrived until now. No responses, no tracking...

I also tried email to: rx6lql at gmail dot com but no reply from him too.

I will try to email them again. Maybe they missed my last messages.



If you are interresting in discussions or threads where I tried to share it then check it here:

https://forums.qrz.com/index.php?threads/f1award-ru-no-plaques-no-replies-funds-grabbed.499273/

http://www.eham.net/ehamforum/smf/index.php/topic,104441.0.html


Thank You for comments, experiences... but in general the most important is to pay big attention where and whom you are sending your money. The Ham radio is not fair-play game anymore it seems...



73 - Petr OK1RP

07 January 2016

Looking for clean SS HF PA w/QSK... (Juma)

Hi all,


some time ago I posted on different forums and ham radio boards an announcement that I am looking for power amplifier as follows:

"I am looking for highly reliable, clean, compact, solid state HF-6m bands PA with 100% working, smooth QSK at around 1-1.2kW heavy-duty output and standard radio interface. Commercial only (no home made) for resonable price. Can someone recommend me any according to own good experiences please?

My favourite model to buy was untill now Acom 1200S but I realized it has no QSK implemented.

http://acom.radioamater.cz/acom1200s-leaflet.pdf

...so no way for me on CW.

As the long time Elecraft K3 owner I was also interrested in the KPA500, but there is not enough power as I am looking for 1-1.2kW heavy-duty output.

Any kind of tip, hint or recommendation is appreciated.

73 - Petr, OK1RP



The threads with an interresting discussion can be found for example here:

http://www.eham.net/ehamforum/smf/index.php/topic,105945.0.html

After some time I remembered that Juma developed some power amplifier with power about 1kW. The complete information can be found here:

http://www.jumaradio.com/juma-pa1000/
Unfortunatelly I did not found the information about the full, smooth QSK feature which is key-parameter for me so I decided to ask them here:

http://www.board.jumaradio.com/viewtopic.php?f=11&t=290

(more discussion about this interresting amp here):

http://www.board.jumaradio.com/viewtopic.php?f=11&t=22


Unfortunatelly I have no reply from Juma or current owners till now.
In fact I did not found any kind of amplifier which meets my requirement or expectations. The Juma is still in high focus...


User manual
Firmware update
Pictures


73 - Petr, OK1RP
"auf die Dauer hilft nur Power" (Erich, HB9FIH)

04 December 2015

$60 MR100 antenna analyzer - the output frequency quick test

Hi all,

I found on the internet that some of these Chinese analyzers like SARK100/MR100 have a serious problems with their DDS chip. This resulted in an output frequency being 1.5 times lower than what was displayed on the analyzer. To check if this was the problem with my analyzer I did a quick test.

Simply I connected the MR100 module to Agilent Frequency Counter in my laboratory and set the filter as same as input attenuator ON.

After I switched 160m thru 6m band range in order to check the frequency accurracy as same as stability.

The results can be seen on the pictures below:

 
The laboratory test conditions: T=25.5C +/-0.5C, Hum=45% +/-15%.


It looks like this module works as it should. The articles I read about this problem were all older articles so I guess it’s an old problem that doesn’t occur anymore?!

Hope it helps.


73 - Petr, OK1RP

$60 MR100 antenna analyzer - PC interface and post-analysis software test

Hi all,

after first few tests of the analyzer alone I tried to connect MR100 antenna analyzer to PC also... in order to test the post-measurement data analysing.

First of all after connecting the module to PC using USB cable you have to check if the FTDI chip adapter is already recognized by PC. I do not know if there is genuine FTDI chip implemented but I can suppose it isn't. In my case I found in Win Device Manager that FTDI chip is unknown and related driver is not installed. Luckily in my Win7 the system found automatically the proper driver and installed it in few minutes. So after finishing it the FTDI adapter is showed in Device Manager as that all is installed and it works properly.

After that you should find which COM port is assigned when the analyzer module is connected. In my case it was COM7 which will need to be added into the post-processing software.

The SARK100 Antenna Analyzer Software for Windows usable also for it's derivates is available here:
 
Another software for SARK100 and derivates is here:
http://die-jetzis.de/WinPCC-Sark100-V0.9-DH1KLM.rar

Chinese language (partly in english) software for Mini60/SARK100/MR100 v0.9 is here:
http://cq.hub.tw/forum.php?mod=viewthread&tid=866and
 
Nice software that scans the SARK100/MR100 and plot the SWR on frequency by SM6WHY is here:
http://www.sm6why.n.nu/SARK-100

I decided to test for the first shot the software which was recommended by seller. It is the WinPCC for Mini60 and should work also with SARK100/MR100 in it's version 0.9 in Chinese language...

Run your antenna analyzer and click Config button to get PC Link, then click Down button to get Waiting Link... message.

After running the WinPCC software .exe file the main screen shows that Chinese vs english words is 50/50%...hi. The most important is left side command panel.


In the top left corner you need to select the proper assigned COM port then click on the left Chinese button which means "Connect" in english. After that you should see on the antenna analyzer itself that Waiting Link is already changed to "scanr" message which means it's connected and ready to scan upon PC software commands request.

Lowest left side command panel button means in english "Stop Scan", next button above is "Continue Scan" and next button above means "Start Scan". Screen with translated buttons to english is in improved later version WinPCC v.1.0_eng:


By clicking to the Start Scan button you should see scanning procedure and you should see the plot of SWR and other impedance parameters on the screen.

 
Here you can see the plot of very bad 50Ohms load measured in 6m band range including the Smith diagramm plot... nice feature.
 
If you will have problems with running the WinPCC then maybe the following link to Youtube will be helpful:
https://www.youtube.com/watch?v=eJZuUeRieZE

During my intensive testing I realized that this version of the WinPCC software has probably some bug in the code as the programm stucked many times when I tried to change some parameters like frequency range, step etc. The only solution is to quit the programm and run the .exe file again. Unfortunatelly you have to set COM port again...

Another problem is that if you want to use magnification button on the top (magnifying glass symbol) then it is always switching the plot into 3D vision... it is not possible to play with magnifition funtion in 2D only.

Well in general the basic WinPCC v0.9_ch software works. MR100 antenna analyzer PC interface is working. Connection or sync with PC is working and post-alanysis is possible. Now it will be funny to test other more sophisticated softwares... see links above.

Hope it helps.


73 - Petr, OK1RP

23 November 2015

$60 MR100 antenna analyzer toy

Hi,

maybe you heard about the simple, cheap antenna analyzers which are available on different e-shops, auctions, shopping galleries etc. already.

There is one of them - $60 MR100 antenna analyzer toy - first test

http://youtu.be/82JGs1yC_cM

I got it from our local radioclub staff last week for testing. He bought it somewhere on the internet for $60.50 fully assembled and tested. It does not look so bad for these money.


According to discussion with mentioned friend in the radioclub the cheapest way is to buy the analyzer module itself w/o BT option. The metal housing, BT, battery pack, etc. is up to you. Latest v.13 firmware should be available.

The full spec can be found in the manual here:

http://115.28.16.44:81/file/3803.pdf


Basics:
The toy is powered from 12V/500mA w/auto power off
Max. measured impedance/reactance (C/L mode) is 2000 Ohms
Max. measured freq. is 60MHz
Steps 100Hz to 100kHz

Mini USB port to PC

Tests:
SWR, magnitude impedance, complex impedance, capacitance, inductance.
Derivate tests: ground loss, C, L, velicity factor, coax el. lenght, etc.




As it is using AD9851 DDS chip (Nyquist at 90MHz w/internal x6 multiplier clocks the DDS at 180MHz), the practical maximum output frequency from AD9851 is however about 70MHz. In my opinion as a third of the maximum DDS clock frequency for the AD9851 chip I prefer the maximum of 60MHz output frequency (lot spurs/aliases above). It is corresponding to the analyzer module spec.


After getting it from our local radioclub staff for testing I browsed on the net and I found that there is several clones and derivates from genuine SARK-100 like MR100, Mini60, GA-60 and many others. All of them are using the same generic EA4FRB f/w...


The genuine SARK-100 has been retired already. More information you can find here:
https://sites.google.com/site/ea4frb/antenna-analyzers/sark100/Archive



It is now replaced by new and much more sophisticated SARK-110.
More information can be found here:
http://www.sark110.com/


I do not like the illegal chineese copies and MR100 unit is definitely one of them. 

Once I have it in hands I am planning to compare it with AA-200, MFJ-259 and even more I will try to make some comparison with professional Agilent E5061 network analyzers which I have available in my shack and lab.

 
I do not know more about MR100 analyzer as I have not schematic yet but I will try to make another video with functions and options available incl. calibration and some measurement.

The SARK100 Antenna Analyzer Software for Windows usable also for it's derivates is available here:
 
Another software for SARK100 and derivates is here:
http://die-jetzis.de/WinPCC-Sark100-V0.9-DH1KLM.rar

Chinesse language (partly in english) software for SARK100/MR100 v0.9 is here:
http://cq.hub.tw/forum.php?mod=viewthread&tid=866and
 
More information can be found here:

Battery pack solution to power the MR100 or SARK100 by Ham Source:
http://www.hamsource.com/WLB-817.html

Hope it helps,

 
73 - Petr, OK1RP

23 October 2015

A corrected version of QST's KSYN3A in K3 review

Hi,

there is the link for corrected version of QST's KSYN3A board review which is replacing the erroneous TX phase noise plot in their last QST article:


http://www.elecraft.com/K3/QST%20KSYN3A%20revised.pdf

Figures 10 and 11 have been updated by the ARRL to show the KSYN3A's actual transmit phase noise. As you can see, relative to the original synth, the KSYN3A has far lower noise at close offsets (toward the left end of the graph), and nearly identical noise at wider offsets (toward the right).

As Wayne, N6KR mentioned previously, this is a *transmit* phase noise plot. Phase noise is even lower right at the output of the synth module itself, accounting for the KSYN3A's outstanding RMDR (reciprocal mixing dynamic range, which applies to receive mode).

 
There is also explanation of their mistake in LF bands performance (500kHz/137kHz) measurement due to lack of proper modification on tested K3!

Thanks to Wayne, N6KR for sharing the link...


Hope it helps,


73 - Petr, OK1RP