Triple-filter design (12 kHz, 6 kHz, and 2.7 kHz).
The Kenwood R-1000 was designed in an era when serviceability was a feature. It is a repairable radio, but only if you have the correct documentation. The is not just a reference—it is the difference between a beautifully aligned receiver that pulls in DX from across the Pacific and a boat anchor with drifting oscillators and distorted audio. kenwood r-1000 service manual