Mark DL6YYM uses WSPR with 1 miiliwatt

I received a very interesting email from Mark DL6YYM about his WSPR adventures first with 20 milliwat and later with 1 milliwatt. Mark makes 1 milliwatt by using an attenuator of 13 dB behind the beacon of 20 milliwatt. Thank you for the very nice info, dear Mark.

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Hi Dear Bert,

From time to time I visit your nice blog. Some weeks ago I read from QRPPP WSPR on your site. 

In the next step I found a very nice project from Alexander RA9YER 
http://ra9yer.blogspot.com/2016/05/arduino-si5351-beacon.html

It's based on ARDUINO and SI5351 
From the SI5351 come about 14-15 dBm output 8 Khz - 160 MHz.
I set the frequency in the script. The complete investment is about 25,00 €.

To the left - Powermeter and Attenuator In front - SI5351 and Arduino - DL6YYM 

Last week I make the first tests on different bands.
Yesterday afternoon I put my attenuator 10 + 3 dB (your idea 8-)) between the SI5351 and my antenne.
My output in the shack ==> 30m Aircell 7 ==> R8 vertical.

In the table below is the result on 40m :-D

DL6YYM with WSPR with 1 milliwatt on 7 MHz

It's a nice fun but CW is better ;-)

But I hope I can make a stand alone TX in the next time.

best wishes es

vy 72 & 73 de Mark DL6YYM nr Leipzig DLFF-050

More info on the DL6YYM Website.

DL-QRP-AG Nr.: 3336 // RU-QRP-Club Nr.: 331 // RTC Nr.: 406 // AGCW-DL Nr.:  3851

amateur radio parts www.bamatech.net

Powermeter and attenuator (set to 13 dB - DL6YYM