Initial testing using the two-MOSFET circuit (http://www.mmccs.com/mmarc/n0ss/k2_t-r_rly_drvr.pdf ) with two 2N7000s, but with R3 removed, indicates that it is working fine, switching a load of about 50 mA at 12-13V. I left R2 in. Thanks all for your comments. 73, Steve VE3SMA