Thanks to all who replied. At K6LL's sugestion I used the circuit at http://www.qth.com/ka9fox/ts850_mods.txt and it seems to work just fine. Thanks again. Mark -- FAQ on WWW: http://www.contesting.com/FAQ/trlog Submissions: trlog@contesting.com Administrative requests: trlog-REQUEST@contesting.com Problems: owner-trlog@contesting.com Feature Wishlist: http://web.jzap.com/n6tr/trwish.html