Thanks Jeff- there are actually three versions. The 3rd and later version used a 35W4 and a 50C5 and was the FCC-90A as I recall. Google brought up info on the 1st and 3rd but not mine :-) Tnx es 73, Dave N7RK -- Dave Hollander N7RK Arizona Tube Supply http://arizonatubesupply.com Ham Radio Page http://n7rk.com