I have the HBR Receiver Data and More CD available. It contains all the available data on the HBR receiver (homebrew tube receiver from the late 1950s to early 1960s), well over 100 pictures of them from people who built them, some DCS-500 pictures, some military manual copies, etc, etc .....213MB in total. Lots of useful items. $10 shipped in the USA and $12 worldwide. 73 Kees K5BCQ