Found this while looking for information on the SB-240. It appears to be a very rare bird indeed. http://forums.qrz.com/showthread.php?374725-Heathkit-SB240-LInear-Amplifier -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://puck.nether.net/pipermail/heath/attachments/20130108/08545efc/attachment-0001.html>