For your info, I have managed to collect some data of the Electro-Voice 638 microphone.You will find it on my site at: http://www.kristronic.com/lx2kl Vy 73's, Kris, LX2KL -- FAQ on WWW: http://www.contesting.com/ampsfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm