Low Pass Filters for WSPR TX

In among taking naps and blowing my nose (yeah i got hay fever or the flu) today, I wound the toriods and built the low pass filters for the WSPR transmitter. I can now connect it to the micro and make it multibanded. The filters are not my best work ever, but I will suck up the 3db losses and just use them. I think i will respin the board using SMD caps, as I have better quality caps in SMD rather than these crappy ebay multi-layer ceramics that are really not much good at all.


Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.