Hal also made one that actually used receiver audio and its own filters instead of being like a scope. https://www.navy-radio.com/rtty/hal/rtty-1/ -Jon N5MHI -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20260414/842faf4e/attachment.html>