Panasonic / National Panasonic,
überarbeitet am 21.10.2010
After their first receivers with digital frequency readout based on a conventional designed double conversion set equipped with a frequency counter, Panasonic presented the DR-31 / RF-3100 in 1982: a PLL synthesized receiver. The operation scheme of the DR-31 / RF-3100 is absolutely straightforward, the good performance on shortwave and ease of operation make this set a good catch when found on the used market for a reasonable price.
The RF-3100 follows a travel receiver design, with all controls located
on it's front panel, it looks like a small desktop receiver and can also be
used for this purpose. With it's dimensions of 37,1 x 12,2 x 24,1 cm and it's weight of
3,2 kg it s too bulky to be used as a travel portable nowadays.
The left part of the front panel space is taken by the 9 cm diameter speaker.
On the back of the receiver, You find the connectors for a long wire and a symmetric dipole antenna, a switch to activate the internal telescopic antenna and an DIN audio input / output jack.
With it's ten controls, the mains switch included, the operation of the RF-3100
is very simple and easy to learn: connect to mains, pull out the telescopic
antenna (the switch at the rear should be set to telescopic antenna), press the
power button and the red power LED will light and You hear a noise from the
speaker. Use the shortwave band segment switch for the first (MHZ) digit
of the desired shortwave frequency, use the main tuning control to tune in
to the kHz digits, when You arrive at 1 5 5, You should hear Vienna's shortwave
According to the age and the design of the receiver, a clock/timer and digital frequency memories are lacking; as a simple shortwave and VHF receiver, the RF-3100 does it's job really well and can be recommended when found for a reasonable price on the used market as an entry or secondary receiver.
© Martin Bösch 13.7.2010