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General| Brand | Heathkit |
|---|---|
| Model | DX-40 |
| Category | Transmitter |
| Language | English |
Details the oscillator stage, its Colpitts circuit, and crystal/VFO control.
Describes the buffer stage and its role in stabilizing the final amplifier.
Explains the final amplifier stage, its tuning, and Pi network output coupling.
Details the modulator stage, including the speech amplifier and carrier control.
Explains the power supply section, rectifier, and filter components.
Procedure for adjusting the oscillator coil for maximum grid current.
Instructions for loading the antenna and tuning the final amplifier to resonance.
Explains the critical role of grounding for low impedance at all frequencies.
Covers final amplifier tube testing, grid drive, and related issues.
Verifying the 6146 tube, grid drive, and critical components for the final amplifier.
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