The Direct Connection Option
Specifications and other information on the Tokyo Hy-Power labs' HL-45B is available at
Tokyo Hy-Power's web site. The measured Gain of this amplifier is shown in Figure #1.
Figure #1. The measured gain of the HL-45B HF/6 Meter Amplifier
Phil Crosno, N6AS, did the initial work on the selection of this amplifier to provide additional power output for a HPSDR rig. His power output of a directly connected HL-45B to a Penelope/Mercury based transceiver is shown in Figure #2. Comparison of the HL-45B to the power output of the PenneyWhistle is shown in Figure #3 (using Penelope as the driver at 13.8 Volts in both cases).
Figure #2. The measured power output of the HL-45B HF/6 Meter Amplifier at 13.8 Volts
Figure #3. A comparison of the HL-45B HF/6 Meter Amplifier power output to the PenneyWhistle power output when both are operated at 13.8 Volts
