Receiver: Drake 2-C
| Band | MDS | Blocking DR | Two-tone DR |
| | (20 kHz) | (20 kHz) |
| 80 meters | -138 dBm | 112 dB | 83 dB |
| 40 meters | -137 dBm | 111 dB | 82 dB |
| 20 meters | -138 dBm | 112 dB | 83 dB |
AM audio S/N: 41 dB
AM Audio Frequency Response: in dB, referenced to 1 kHz measurement
| 100 Hz | 200 Hz | 400 Hz | 600 Hz | 800 Hz | 1 kHz | 2 kHz | 3 kHz | 4 kHz | 5 kHz | 6 kHz |
| -22 | -11 | 0 | +1 | 0 | 0 | -4 | -10 | -14 | -34 | -42 |
AM Audio Distortion:| Mod | 100 Hz | 200 Hz | 400 Hz | 600 Hz | 800 Hz | 1 kHz | 2 kHz |
| 30% | - | - | 7.9% | 4.0% | 4.0% | 4.5% | 7.1% |
| 50% | - | - | 10% | 4.5% | 4.0% | 4.5% | 5.0% |
| 70% | - | - | 13% | 5.6% | 5.0% | 5.0% | 5.0% |
| 90% | - | - | 13% | 5.6% | 6.3% | 6.3% | 5.6% |
| 100% | - | - | 13% | 6.3% | 7.1% | 7.9% | 6.3% |
Notes: AM frequency response was fairly restricted due to the 4.8 kHz maximum i-f bandwidth. AM distortion numbers show the somewhat typical increase at lower audio frequencies - most often caused by the low audio frequencies riding on the AGC line. The audio response rolls off quickly on the low end due to undersized coupling capacitors in the AM detector and audio amplifier.
This was Drake's first hybrid tube/transistor receiver. The amplifier, mixer stages and VFO are tubes and all other circuits are solid state.
Info on the measurement setups and test results on other receivers can be found at:
http://www.w1vd.com/BAreceivertest.html
