BASIC Tech Group - MyNews 21 - TX received WSPR

I have been tinkering around with WSPR for a while, but with my less than useless antenna - a 4ft whip standing on my shack table! - I have not been received anywhere.

But now I have added an amplifier.



On the right is the LCD display of the message being sent, the "20" is a guess of the ERP going out... next along is the stack of an Arduino UNO at the bottom, next up a DDS built around the Si5351 synthesiser plus an RTC built around a DS3231 and on top a new shield which has two parts, one is a LPF and buffer amp for the Si5351 output, to the left, on the right is an RF voltmeter built around the AD8307 device (not use for these transmissions).

Then next to the left is an MMIC linear amplifier, found on eBay, 1-900MHz they say. 1-2W out, 12V operation.







This is the result this morning on WSPRnet