Rumor says there was an article in QEX or Communication Quarterly, about modifications of MLA2500 to accept russian tubes. Any info better than this? 73 Kele YU1AO/6 -- 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