I have both these rigs fully accessorized. The 515 has the sherwood
filters, speaker, keypad controller, memory unit, 10-turn pot, etc. The R7A
has speaker and all the Drake filters for SWLing and the RV75. I also use
Sherwood's SE-3 Synch Detector with both rigs. I'm contemplating (lighlty)
to sell one of them but I"m having a hard time with choosing. They are both
unique in their own way. Both are 5-Star rated receivers. What do you guys
think?