Mezanine LP4 add-on card documentation.
Schema
Build instructions
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The Mezzanine LP4 add-on card have the following characteristics
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Sits on top of a WSPR-TX_LP1 transmitter as an add-on.
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Expands the WSPR-TX_LP1 with four low pass filters.
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Is a partial Kit.
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Needs four low pass filters, product number 1021.
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The user chooses what four Ham bands to build low pass filter for.
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Data:
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Size:
65x55x25mm. -
Power usage:
0.2W (5V 40mA) -
Weight:
30g with filters. -
Suppresses overtones from the WSPR-TX_LP1 with 50dBC or more.
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Insertion loss less than 1dB.
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The Mezzanine LP4 is an add on for the WSPR tranmitter WSPR-TX_LP1 that expands the transmitter from one band to four or more bands (US users can use a single low pass filter for more than one band, se FAQ in build instructions.)
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A WSPR-TX-LP1 with this add on will give the same features as the WSPR Desktop version but to a lower cost and without a metal box. The user also have the freedom to mix any four filters for his/her favorite bands.
On the other hand this product requires soldering skills and that you can run the Arduino IDE and upload sketches.
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