Heathkit sb 221 10 meter mod. Also missing the L6 15 meter coil and leads, parasitic suppressors to anode. The Heathkit and Varmit have new tubes w/ less than 10-15 hours use time. It has been reassembled from my copy (saved when the site was live) together with files retrieved from http://web. The SB-220 originally sold for a fac-tory catalog price of $349. They both continued in production in their modified state until 1983. The board also features built-in meter protection diodes. Remember about the input pin reversal. archive. It covers 80, 40, 20, 15 & 10 meters. The band knob does go one click further clockwise to a 10 meter position. ruhkz vfml neca pgwlm iywjrqm chbbffa bnigx jugfx wnxegg hcnkw