Print deze pagina

OZ2CPU digitale RF mW-dBm-mV meter

 

To make power measurments to the Ultimate3 I was using a very simple QRP meter which wasn't good enought to make real low power measurment (below 500mW).There for I was looking around for a digital RF mW DBm mV meter and one of the OM's at a Veron/VRZA Twente had build a OZ2CPU digital RF mW DBm mV meter. I was quite impressed with the possibilities of this kit and found out that Kent Electronics was selling them as a kitt.

Because the basis PCB had 2 measurment PCB's to it, I orded a extra AD8307 so I could also use it for SWR and Diff measurments. The kitt is for most build with SMD components so a little experiance with these components is a must.

I could write a lot about it on how it was build, but I think the pictures will say it all.

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_001.jpg

 

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_002.jpg

 

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_003.jpg

It's alife . . .

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_004.jpg

 

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_005.jpg

My local component supplier (Explorer Elektronica in Almelo) had a nice metal housing on stock which was perfect for the meter. So it's time for heav metal.

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_006.jpg


http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_008.jpg

 

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_009.jpg

Un-connected input and no shielding on the measurment PCB's.

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_010.jpg

I connected a DIY very low power 2m beacon transmittor to see if it would do the trick. Well it did.

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_011.jpg

 

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_012.jpg

 

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_013.jpg

Looks nice allready but no shielding yet for the measurment PCB's.

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_014.jpg

Old-Skool hamradio casing. Was a time ago but still got it (should do that more often)

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_015.jpg

 

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_016.jpg

I soldert 2 wires from the box to the door (when I have time I want to solder 4 brass nuts in the box).

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_017.jpg

A bit of tape to close the door and it's done.

http://www.bolkesteijn.nl/blog/images/hamradio/mWmeter/mWmeter_018.jpg

To be continued. . . .


Previous page: Ultimate3 QRSS kit - page 12
Volgende pagina: 36dB Attentuator