AT4K
| Output Power: | 2500 Watts single tone continuous |
| HF Bands: | 160m to 10m (assuming resistive load) |
| Tuning: | Three controls |
| Antenna switching: | 10 Amp RF 6 position mode switch for multiple antennas |
| Capacitor: | low minimum custom variable capacitor; 460pF@6 kV |
| Roller inductor: | 10 Amp silver-plated inductor wheel shaft and contact wheel on ceramic body |
| Impedance: | matching range 20 Ohms to 1500 Ohms |
| Metering: | Active crossneedle Peak/Peak Hold with backlighting |
| Meter power range: | 0-300 Watts/ 0-3000 Watts |
| Balun: | Ferrite 1:1 inpupt balun |
| Output: | Unbalanced/Balanced activated by front panel switch |
| Chassis: | .090 ga. aluminium gold iridite coated |
| Top cover: | .090 ga. aluminium powder coated |
| Front cover: | .090 ga. aluminium powder coated |
| Dimensions: | 15 1/8" wide x 7 5/8" high x 19" deep |
| Shipping weight: | 20 lbs |
| Warranty: | One year |