Frequencies

USB dial (MHz): 0.136, 0.4742, 1.8366, 3.5686, 5.2872, 5.3647, 7.0386, 10.1387, 13.5539, 14.0956, 18.1046, 21.0946, 24.9246, 28.1246, 50.293, 70.091, 144.489, 432.300, 1296.500

3rd Party Maps and Data

VK7JJ Site
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DJ2LS WSPR Spot Heat Map
LU7AA/LU7ABF Maps/Graphs (slow load)

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How many mW is my Raspberry Pi /w TAPR Shield Putting Out?

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Mon, 2017/02/27 - 19:19

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KK4PP

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Last seen: 4 years 9 months ago

Joined: 2017/02/27 - 15:55

How many mW is my Raspberry Pi /w TAPR Shield Putting Out?

Having a lot of fun running my new Raspberry Pi WSPR transmitter. Trying to keep it running 24/7 for the most put. Excited to occasionally be heard in Europe! Feel free to look me up on the map (20m only).

I have a question regarding the power output. Most sites seem to indicate that Pis running WSPR out out around 10mW. I am using a TAPR 20 shield on top of the Pi. The shield is marked "20m 20dBm". To me 20dBm indicates 100mW, but that's 10x the 10mW power most other websites propose as the WSPR Pi output. Does anyone definitively know the output of a WSPR Pi with or without the TAPR 20m shield?