National Panasonic FM/LW/MW/SW1-3 Receiver DR28 & manual (RF-2800B) SHORTWAVE

Strangely, it is marked DR-28 on the front, and RD-2800B on the back which probably the number of shortwave bands, and no long wave.

It has had a thorough exterior clean and some switches have been cleaned and exercised. The radio receives stations on all bands and the audio quality is good.

However, I do not have skills to service it or align/calibrate so that will be left for the next owner.

See photos. This item is listed as SPARES or REPAIR as it is now forty years (or more) out of warranty!

Copied from the web:-

Main principle

Superhet, double/triple conversion

Wave bands

Broadcast, more than 2 SW bands plus FM or UHF.

Power type and voltage

Line / Batteries (any type) / 110-125; 220-240 / D cell: 6 x 1.5 Volt

Loudspeaker

Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch

Power out

3 W (unknown quality)

Material

Plastics (no bakelite or catalin)

from Radiomuseum.org

Model: National Panasonic DR 28 RF-2800B - Panasonic, Matsushita,

Shape

Portable set > 8 inch (also usable without mains)

Dimensions (WHD)

380 x 250 x 120 mm / 15 x 9.8 x 4.7 inch

Notes

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

The SW2/3/4 bands use double conversion (2MHz 1st IF, 455KHz 2nd IF), whereas the MW/SW1 use single conversion (455KHz). 

This is a solid state radio, using 24 Transistors, 16 Diodes, and 5 IC's from Matsushita/Panasonic (AN7210 for AM Conv & FM/AM IF Amp,  AN7211 for FM IF Amp & FM/AM/SSB Det & Meter Amp, AN7212 for SW 1st Osc. & Mix & MW Osc, RVITD6101P-1 Divider for Counter Display, and RVIM54829P Counter & VFD Driver for Counter Display.