Dave, I have to say that your Drake R4A is a neat looking bit of kit. I was a SWL 40-odd years ago and in those days - apart from Collins - the Drake line was the bees-knees. All I could afford was a HRO-MX and no bandspread coils! Great way of learning how to tune SSB signals with backlash on the main tuning.... 73 Bob 2M0KDZ