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General| Brand | Heathkit |
|---|---|
| Model | SB-401 |
| Category | Transmitter |
| Language | English |
Steps to align the transmitter when used with an SB-303 receiver.
Procedure for adjusting the 8.6 MHz trap.
Steps for adjusting the carrier generator circuit.
Steps to balance output tubes for proper operation.
Steps to set the bias for the final amplifier tubes.
Instructions for connecting a microphone to the transmitter.
Procedure to calibrate the Linear Master Oscillator.
Procedure for installing crystals in the unit.
Steps for adjusting the heterodyne oscillator.
Procedure for adjusting the driver stage.
Procedure to balance the modulator and minimize carrier output.
Steps to adjust the frequency shift for proper operation.
Final tuning steps for maximum output.
Overview of allowable operating conditions and equipment combinations.
Details on operating the transmitter.
Instructions for operating the transmitter in CW mode.
Instructions for operating the transmitter in SSB mode.
Steps for operating the transmitter independently of a receiver.
Step-by-step guide for tuning up in CW mode.
Step-by-step guide for tuning up in SSB mode.
Table of common difficulties and their possible causes.
Explanation of the schematic diagram.
Description of the audio preamplifier and cathode follower stages.
Description of the VOX amplifier stage.
Description of carrier generator circuits.
Description of the balanced modulator circuit.
Description of the linear master oscillator.
Description of the ALC circuit.
Explanation of how the meter circuits work.
How high voltage is measured.
How relative power is measured.
Chart listing resistance values for various components.
Chart listing voltage values for various components.
List of parts for the mixer-bandpass circuit board.
List of parts for the carrier generator circuit board.
List of parts for chassis mounting.
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