Here's all the Model 28 info - I'll list more as I come across it http://www.navy-radio.com/manuals-ttycorp.htm#cross Corrections, Additions, etc are welcome! Nick -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20200301/f7afec0e/attachment.html>