Kenwood R1000 shortwave receiver
We have modified a Kenwood R1000 shortwave receiver with a DRM mixer which was obtained from Sat. Service Schneider in Germany.
The mixer is a 467 kHz type with crystal option.
Attached you'll find the Kenwood user manual front page, the specification, the schematic, a picture of the mounting and the output spectrum.
The mixer is connected to the last IF buffer in the Kenwood receiver, on the connection of R148 with the emitter of Q24 (point A). The 'hot' connection of R148 is conveniently the upper wire of the resistor which is mounted vertically. The power connection was made at point B.
We connected the DRM modulator output to the antenna input of the Kenwood with a 40 dB attenuator inserted, and the resulting output spectrum was recorded. I think the spectrum looks quite well and usable.
Editors note: This receiver has yet to be tested and proved with the software, but this document will be updated when it has been tested
Hans Linkels
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