I already have the RSGB Teleprinter Handbook. I bought that back in the mid-seventies. I just snagged two others on eBay that I remember. RTTY from A to Z and The New RTTY Handbook. And just now, ARRL Specialized Communications Techniques. Amazing that these are now 45-49 years old. -- "I am a river to my people." Jeff-1.0 WA6FWI www.foxsmercantile.com