Was just looking for a source for 3-500Zs and see that there are a variety of Chinese brands, as well as some NOS Eimacs and Amperex. Any recommendations as to which to avoid or which might be the most reliable? K8AC -- FAQ on WWW: http://www.contesting.com/FAQ/amps Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com