Ron, There are a number of VERY simple mods you can do---check the back issues of ELECTRIC RADIO for details... Mine were as simple as DELETING the caps paralleled across the audio driver/mod transformers, INCREASING The coupling caps in the 2x6AU6 stages, & INCREASING the bypass caps (screen & cathode) in same... It works---or so I've been told by "before & after" QSOs on 40! ~73~ Eddy VE3CUI - VE3XZ