Ampex and Studer Mailing Lists
http://www.recordist.com/ is home to the Ampex and Studer mailing lists. I subscribe to the Ampex list. It is a great place to post questions about any tape recorder that Ampex made and you will often get answers about anything Ampex made. Many of the people there are experts. Some even designed some of the Ampex recorders. Polite newbies who are interested in learning about Ampex gear or fixing their Ampex machines are welcome. Normal net user names are OK on the list but many members request that you include your real name in your posts. These are old fashioned mailing lists.