Has anyone tried using a 4N35 in place of the 4N33's in any of the keying circuits? Looks like the only difference is a single transistor output in the 35 vs. darlington in the 33. I saved a number of 4N35's from the dumpster and would like to know anyone's experience with them. Thanks, Mike, W1NR -- WWW: http://www.writelog.com/ Submissions: writelog@contesting.com Administrative requests: writelog-REQUEST@contesting.com Problems: owner-writelog@contesting.com