National Panasonic DR 28 RF-2800B - Matsushita, Japan. A good choice for collectors and those looking for a radio that never goes out of fashion. Broadcast Receiver - or past WW2 Tuner Superhet, double/triple conversion Wave bands: Broadcast, more than SW bands plus FM or UHF. Semiconductors (the count is only for transistors) 24: 2SK49 2SC1047 2SA838 2SA838 2SA838 2SC828 2SC945 2SK104 2SC945 2SD367 2SB544 2SC945 2SC945 2SB173 2SC1568 2SC1568 2SC1047 2SC1047 2SC2001 2SA564 2SA564 2SC828 2SA838 2SA838 National Panasonic DR 28 RF-2800B has six wave bands: FM 88-108 MHz MW 525-1605 kHz SW1 1600-3200 kHZ SW2 3.2-8 MHz SW3 8-16 MHz SW4 16-30 MHz Marine The SW2/3/4 bands use double conversion (2MHz 1st IF, 455KHz 2nd IF), whereas the MW/SW1 uses single conversion (455KHz).