Hi I recall a recent very good article about tetrode screen supplys in QST or QEX. Cant recall which one or the issue. Anyone have that info handy Thanks --db-- (AA2GF) -- FAQ on WWW: http://www.contesting.com/ampfaq.html Submissions: amps@contesting.com Administrative requests: amps-REQUEST@contesting.com Problems: owner-amps@contesting.com Search: http://www.contesting.com/km9p/search.htm