Manufactured by Trio-Kenwood.
When the Kenwood R-1000 was launched in 1979, the experts were surprised by its technical design, which until then only could be found in much more expensive (semi-)professional communications receivers. In addition to an electronic octave filter preselection, the receiver had a PLL synthesis circuit and thus digital frequency processing and display. With this receiver, shortwave reception for the first time became child's play: switch the set on, set the volume, select MHz, set the kilohertz and listen.
- Principle: Double conversion, IF 48.055 MHz, 455 kHz
- frequency range: 200 kHz - 30 MHz
- Frequency display: digital display, 1 kHz
- Frequency memory: none
- Signal processing: Noise Blanker, ATT x 3
- Features: Clock / Timer
- Sensitivity: AM (A3) < 2 μV, SSB < 0.5 μV / Selectivity: 12/25 / 6/18 / 2.7/5 kHz (-6/-50 dB)
- Mains operation: 110, 220 V
- Battery operation: 13.8 V DC
- 300 x 115 x 218 mm, weight 5.5 kg
With the Kenwood R-1000, Kenwood had launched a communications receiver equipped with electronic preselection and digital PLL frequency processing for the first time in the early 1980s at a price of around DM 1000.
The receiver has dimensions of 30 x 11.5 x 21.8 cm (w x h x d) and a weight of 5.5 kg. It is equipped with a strong carrying handle that also serves as a stand. The cabinet colour is anthracite grey, the lid can be removed by loosening four screws on the sides of the unit. All external connectors on the back are in a slightly recessed position, so the receiver can be placed on four plastic feet on it's rear face without damaging the connectors.
The front panel is divided into three main elements: on the left are the switches for mains power and timer operation, in the middle are the frequency display window and the main tuning knob, and on the right are the other controls.
The rotary switch at the top left sets the digital display of the R-1000 to display the frequency, the time and the switch-on or switch-off time of the timer. In the positions CLOCK, Timer ON/OFF, the clock and the switching times can be set with the adjacent hour and minute keys; when both keys are pressed, the display is set to 0:00. With the mains switch below on the left, the set is turned on; in the position CLOCK or TIMER, the corresponding times are displayed even when the set is switched off. Pressing the TIMER button silences the set, it will be switched on and off again at the pre-programmed time. Below this are the jacks for the headphones and line out.
In the display window, the green luminescent fluorescence display indicates the reception frequency with an accuracy of 1 kHz, the clock display is in 12h format, with the AM/PM LEDs signalling morning / afternoon according to the U.S. customs. In addition to the digital frequency display, the R-1000 has an analogue circular dial on which the frequency can be read with an accuracy of approx. 5 kHz; for recalibration, the pointer line can be moved by turning the ring behind the tuning knob. The rugged main tuning knob is equipped with a finger recess, since the set has no separate fine tuning, the tuning knob must be operated carefully when tuning an SSB station or for ECSS reception. At both ends of the 1 MHz ranges the frequency overlaps by about 100 kHz. When the receiver is tuned over a 1 MHz boundary, the frequency is still correctly displayed; so when tuning up from 11.995 over 12.000, the display continues to read the correct frequency when reaching 12.005 kHz (in contrast to e.g. Icoms IC-R70).
Below the frequency display is the S meter calibrated in S units and below that the buttons to dim the dial illumination and for the noise blanker.
At the right side of the front panel is the volume and tone control in the form of a double potentiometer, the attenuator control, you can select attenuation steps up to -60 db, which protects the input stage from overloading on long antennas; the automatic RF gain (AGC) cannot be switched off. Below you find the operating mode pushbuttons for AM-wide and AM-narrow, for USB and LSB-CW. Since the wide AM 12 and 6 kHz filters do not completely eliminate adjacent channel interference, the 6 kHz filter can be set to become AM-wide and the excellent 2.7 kHz SSB filter to to become AM-narrow by changing a internal bridge. To the right of the operating mode switches is the selector for the MHz ranges from 0 - 29, i.e. in the international version, frequencies from approx. 200 kHz to slightly above 30 MHz can be tuned, in a version restricted to the frequency range permitted in Germany at the time, the receiver had an upper frequency limit of 26.1 MHz to be compliant to german FTZ regulations.
On the back of the set, the mains input, a 13.8 V DC socket, a connector for control of a tape recorder or for muting when used together with an amateur radio transmitter, the speaker socket (the matching Kenwood SP-100 was recommended) and the antenna connectors. As antenna, a low-impedance SO239/PL and high-impedance long-wire antenna can be selected. All connectors are slightly recessed and thus protected from damage.
Few communications receivers were as easy to use at the time the Kenwood R-1000 came into the shops, and even today the R-1000 is easy to use. There is no band switching, no preselector, no Rf-gain control that can be misadjusted, no frequency input - keyboard that acknowledges operating errors with beeps or error messages …
Press the button Power to turn on the receiver and the lights go on, attach a few metres of random wire to the antenna terminal SW-B (the switch below should also be in this position) and here you go. With the rotary knob 0 - 29 the MHz range is selected, with the tuning knob the last three digits of the frequency are set, the volume control is set to a comfortable volume, done. If you hear a howl when tuning, the set is probably still set to USB or LSB for single sideband reception, for the first steps in the shortwave bands, listening to broadcast stations in AM is easier to start with. In case of adjacent channel interference set to AM-NARrow, if the set is too quiet, check - maybe the attenuator is not yet set to 0.
Only when operating the timer and especially to look up the pin assignment of the contacts on the rear panel, which have to be connected to the pause function of a tape recorder to start automatic recording, you need to check the easy to understand manual.
The receiver is sensitive and can handle long-wire antennas without problems. Especially in the AM-wide position, the selectivity is not sufficient to separate adjacent channel stations with the usual 5 kHz spacing. By changing the position of a bridge inside the unit, as described at http://mods.dk, the SSB filter, which is much narrower with its 2.7 kHz, can be used as AM-NARrow and the 6 kHz filter as AM-WIDE.
To start with shortwave reception, I can recommend the Kenwood R-1000 without compromise, if you can find a second hand set somewhere. The receiver has no fine tuning and also for SSB the main tuning knob must be used - but the R-1000 will serve you faithfully as a secondary set even if you have acquired a modern top of the range receiver.
Double conversion superhet, PLL frequency synthesis.
The set is solid state.