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Author Topic: $60 MR100 antenna analyzer toy - first test  (Read 11716 times)
OK1RP
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Posts: 155




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« on: November 21, 2015, 08:01:26 AM »

Hi,

There is $60 MR100 antenna analyzer toy - first test
http://youtu.be/82JGs1yC_cM

I got it from our local radioclub staff for testing.
It does not look so bad for these money.

I will be happy for comments and your experiences too.

73 - Petr, OK1RP
http://ok1rp.blogspot.com
« Last Edit: November 21, 2015, 09:28:46 AM by OK1RP » Logged
KU3X
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Posts: 435




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« Reply #1 on: November 21, 2015, 08:11:29 AM »

There really isn’t much to comment on ? You tested for resonant frequency and the unit showed resonant frequency. It did its job. Show more functions and you’ll get more comments.
Bottom line, “What other function can it do?”

Barry
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N3DT
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Posts: 1275




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« Reply #2 on: November 21, 2015, 09:57:35 AM »

Yeah, I'd like to see the specs, or at least a user manual.
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OK1RP
Member

Posts: 155




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« Reply #3 on: November 21, 2015, 10:30:40 AM »

Hi all,
manual is available here:
http://115.28.16.44:81/file/3803.pdf
73 - Petr, OK1RP
« Last Edit: November 23, 2015, 09:25:05 AM by OK1RP » Logged
OK1RP
Member

Posts: 155




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« Reply #4 on: November 22, 2015, 08:44:51 AM »

Hi,

upon email's requests... yes 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 (see link) above.
I will try to make another video with functions and options available incl. calibration.

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

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.

I do not know more about it as I have not schematic yet.

73 - Petr, OK1RP
http://ok1rp.blogspot.com
« Last Edit: November 22, 2015, 09:24:56 AM by OK1RP » Logged
KC8MWG
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Posts: 445




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« Reply #5 on: November 22, 2015, 09:56:09 AM »

IIRC, these are basically just a bare-bones Sark100 clone.
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OK1RP
Member

Posts: 155




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« Reply #6 on: November 22, 2015, 12:28:38 PM »

Yes they are.

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 others. All of them are using the same generic EA4FRB f/w.

The genuine SARK-100 has been retired already and it is now replaced by new SARK-110.

I do not like the illegal chineese copies and this unit is one of them.
As I got it for testing I am planning to compare it with AA-200, MFJ-259 and Agilent E5061 analyzers which I have available in my shack/lab.

73 - Petr, OK1RP
http://ok1rp.blogspot.com
« Last Edit: November 23, 2015, 01:46:53 AM by OK1RP » Logged
N3DT
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Posts: 1275




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« Reply #7 on: November 22, 2015, 12:59:15 PM »

Interesting, I may look over the manual if it's readable. I've got an AA600 I could compare it to. $65 is play money. $500 is not.
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OK1RP
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Posts: 155




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« Reply #8 on: November 22, 2015, 01:03:37 PM »

Yes, you are right Wink
The manual is available in "english" see link above.
Petr, 1RP
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OK1RP
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Posts: 155




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« Reply #9 on: November 23, 2015, 01:49:35 AM »

Hi,

just FYI.
The SARK 100 Antenna Analyzer Software for Windows usable also for it's derivates is available here:
http://www.eham.net/classifieds/detail/465278

73 - Petr, OK1RP
http://ok1rp/blogspot.com
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N3DT
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Posts: 1275




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« Reply #10 on: November 23, 2015, 06:46:42 PM »

I looked over the manual and it looks like the device may be good for $60, but I really have too many other things to do than to play with it. It appears that my AA600 does so much more with out the problems of playing with the software and also the AA600 has the actual ham bands already programmed. Plus I notice the 600 will read SWR to 999 and |Z| to 5 figures (20 000 or more in the software) not that it will be accurate there. Frequency can be entered to the sub-Hz in the 600 and also bandspread and center freq can be entered on the keypad without scrolling through. Plus the trace display is right on the face. I only wish the 600 had the timing device one of the others has to pull it up on the antenna for a trace.

For the loot, I like my AA600, and it comes with the software and is also a legitimate device. If I were a poor bloke like I was in 1970 I'd consider the MR100.

But I did pay over $500 for the AA600. It's your choice.
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DRBEN
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Posts: 324




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« Reply #11 on: November 23, 2015, 07:16:29 PM »

The MR100 is a clone of the Sark 100 analyzer. I recently purchased the latter for $85 (delivered). It is not a "toy". There is no graphing function but it will accurately calculate SWR (resonance), impedance, reactance, etc. Unless you frequently need all the bells and whistles of a $400+ model, the Sark is a good buy. 
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OK1RP
Member

Posts: 155




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« Reply #12 on: November 24, 2015, 02:24:47 AM »

Hi,
thank for comment.
Can you let us know the link where you bought it for $85 please?
Mni thanks,
73 Petr 1RP
« Last Edit: November 25, 2015, 01:08:46 AM by OK1RP » Logged
DRBEN
Member

Posts: 324




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« Reply #13 on: November 24, 2015, 07:17:13 AM »

Hi,
thank for comment.
Can you let us know the link where you bought it for $85 please?
Mni thanks,
73 Petr 1RP


I got it on eBay, from Hong Kong:

http://www.ebay.ca/itm/ANT-SWR-Antenna-Analyzer-Meter-For-SARK100-Ham-Radio-Hobbists-New-/261628173314

It has an input for a 12v power supply (not included). It also has a compartment for 8 AAA cells, but mine came without the two 4 x 8 AAA battery boxes needed. There were just two wires in the empty compartment. However, you can get the battery boxes on eBay for $0.74 each, shipped FREE from China (http://www.ebay.com/itm/281318452682?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT).

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KC8MWG
Member

Posts: 445




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« Reply #14 on: November 24, 2015, 04:03:27 PM »

Hi,
thank for comment.
Can you let us know the link where you bought it for $85 please?
Mni thanks,
73 Petr 1RP


I got it on eBay, from Hong Kong:

http://www.ebay.ca/itm/ANT-SWR-Antenna-Analyzer-Meter-For-SARK100-Ham-Radio-Hobbists-New-/261628173314

It has an input for a 12v power supply (not included). It also has a compartment for 8 AAA cells, but mine came without the two 4 x 8 AAA battery boxes needed. There were just two wires in the empty compartment. However, you can get the battery boxes on eBay for $0.74 each, shipped FREE from China (http://www.ebay.com/itm/281318452682?_trksid=p2057872.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT).


Probably a little more expensive but you can get similar battery boxes from Radio Shack and you don't have to wait for that "slow boat from China"...
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