Diamond SX-200 Compared with PowerMaster.
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READ HERE: copyright © 2001 - 2008 Cor pd0rkc.
Renze (VE6DC) owns an Array Solutions PowerMaster meter and took it with him to
Tjalling (PA3GOS).
Both amateurs are impressed with this nice (verry accurate) Power Master meter.
I (Cor PD0RKC) never had a good accurate power meter to compare (and calibrate) my
cheap Japanese Diamond SX-200 PWR & SWR meter with.

At 27 May 2007 we have compared and calibrated the Diamond SX-200 meter with the
PowerMaster SWR & PWR meter.

CALIBRATING THE DIAMOND SX-200!



Tjalling (PA3GOS) calibrated the Diamond SX-200 at 14Mhz.
He used the PowerMaster meter as reference because the accuracy of this meter is within 3% of it's actual reading!!!
After calibrating the SX-200 (on 14Mhz band) we compared the power readings also on 1.8, 3.6 and 28Mhz, it was
not necessary to realign the SX-200 (see the charts below it looks good enough hi!!!).
Keep in mind the Diamond SX-200 was tested on the HF-bands and we did not have
a PowerMaster coupler in the VHF range at hand, so it's hard to tell whether or not the SX-200 will preform
equally as good on VHF after our calibration.
We did not compare the VSWR because we only had a 50 ohm dummyload!
Also bear in mind that not every Diamond meter has to be equal,
We just might have been lucky with this one.
Where FM is mentioned in the tables below, a steady carrier was used.
Used equipment:
Kenwood TS-850
PowerMaster power meter (with 3kw coupler).
Diamond SX-200 (PWR & SWR meter).
Spinner 50 ohm dummyload (400 watt max.).

Diamond SX-200 switched to 200 watt range.
Frequency 1.850Mhz Mode: FM
Diamond SX-200
Power Master
10
11.7
20
21.4
30
32.4
40
42.2
50
50.8
60
59.7
70
69.0
80
78.6
90
87.7
100
96.2
Frequency 3.630 Mode: FM
Diamond SX-200
Power Master
10
11.5
20
22.3
30
32.1
40
42.5
50
51.6
60
61.6
70
69.9
80
79.9
90
89.2
100
98.5
Frequency 14.217Mhz Mode: FM
Diamond SX-200
Power Master
10
10.2
20
20
.
.
.
.
50
51.3
60
60.6
70
69.9
80
80.6
.
.
100
100
Frequency 28.372Mhz Mode: FM
Diamond SX-200
Power Master
10
11.4
20
23
30
34.3
40
45.3
50
54.3
60
63.1
70
72.6
80
81.4
90
90.2
100
102


 

 

 

 

In the tables above you can see that the Diamond SX-200 is very accurate on 1.8, 3.6 and 14Mhz.
The Diamond SX-200 is somewhat less accurate on 28Mhz but it's not too bad.
Due to the the charts I know the deviaton of this Diamond SX-200 meter.

Diamond SX-200 switched to 20 watt range:
Frequency 14.217Mhz Mode: FM
Diamond SX-200
Power Master
5
4.9
20
20

 

Diamond SX-200 switched to 5 watt range.
Frequency 3.630 Mode: FM
Diamond SX-200
Power Master
5
5.1
.
.
.
.
Frequency 14.217Mhz Mode: FM
Diamond SX-200
Power Master
1
0.9
2
2
5
5
Frequency 28.372Mhz Mode: FM
Diamond SX-200
Power Master
5
5.1
.
.
.
.

 

 

Table design was made by: © Cor (PD0RKC).

© 2001 - 2008Cor PD0RKC.