All, thanks for the responses. I now know what to look for (21MX) on eBay. I am not in a hurry, I can wait, but I have http://www.manualsplus.com/ bookmarked. But the link to the pdf (Chapter 2) given by Bob is probably all I need to get going! thanks! - Henk, PA8PDP This message and attachment(s) are intended solely for the use of the addressee and may contain information that is privileged, confidential or otherwise exempt from disclosure under applicable law. If you are not the intended recipient or agent thereof responsible for delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. If you have received this communication in error, please notify the sender immediately by telephone and with a "reply" message. Thank you for your cooperation.