Heathkit HW-16 CW Transceiver Audio Hum Fault Diagnosis — Product Detector Interface Analysis
vk6ada.com.au • Vintage Receiver Fault Diagnosis Series Heathkit HW-16 CW TransceiverAudio Hum Fault Diagnosis — AF Gain Wiring, Grid Circuit, and Scope Validation Root cause analysis of a volume-control-independent audio hum. Kelley W0RK’s grid-grounding test identifies the most probable injection…