Hi 'Crafters, With K2/100 100w out after two QSOs on 40m overall about 40 minutes the BL1 balun is quite hot to the touch. This is the first time I have used the BL1 with a CF Zepp. Amazing SWR 1:1 80m-10m, works great. I'm thinking I might need to glue a heat sink on that toroid. Anybody done this or am I too much QRO and heat is normal. hi 73, Joe, aa4nn