I moved my BC1-T from 1230 kc to 160m, by proportionally scaling back the fixed capacitances in the PA tank circuit (both loading and plate tuning caps), readjusting the rotary and fixed inductors, and getting the grid drive up to normal, and efficiency is about the same or better than it was on the BC band.
I replaced the PA grid/driver plate coil wound on the bakelite form with similar Miniductor coil stock and got a big boost in grid drive when I moved it to 160. On 1230 it would make about 90 ma grid drive, but now I can get 140 mills with full plate voltage, and 165 ma with plate voltage off.
Don K4KYV
