Make
Hammarlund
Model
HQ-180AC
Year
1963-1972
Description
General Coverage Receiver. C model has clock option.
Freq Range
continuous coverage of the broadcast frequencies from .54 Khz to 30 Mhz. These frequencies are divided into six bands,
Tube Complement
| v1 | RF amplifier |
6BZ6 |
| v2 | 1st converter |
6BE6 |
| v3 | HF oscillator |
6C4 |
| v4 | 2nd mixer/crystal oscillator |
6BE6 |
| v5 | 455 Khz gate |
6BA6 |
| v6 | 455 Khz IF amplifier |
6BA6 |
| v7 | 3rd mixer/variable oscillator |
6BE6 |
| v8 | 60 Khz IF amplifier |
6BA6 |
| v9 | 60 Khz IF amplifier |
6BA6 |
| v10 | 60 Khz IF amplifier/AVC/AM detector |
6BV6 |
| v11 | SSB product detector |
12AU7 |
| v12 | Noise limiter |
6AL5 |
| v13 | BFO/signal meter amplifier |
12AU7 |
| v14 | 1st AF amp/delayed AVC clamp |
6AV6 |
| v15 | Audio power output |
6AQ5 |
| v16 | Voltage regulator |
0A2 |
| v17 | Crystal calibrator |
6BZ6 |
| v18 | Crystal oscillator |
6CW4 |