The Tokyo Hy-Power HL-45B Solution
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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. 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 13.6 Volts in both cases).
