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The power of your HF radio
We hear on the occasion of radio communications that are blurred due to the poor condition of the batteries feeding. The symptom is a distortion that this is the beginning of the peak voice only. That's when the transmitter SSB demand maximum power and a low battery break down. Thereafter all transmissions become scrambled and unintelligible. By contrast, in reception, the unit continues to function properly. These symptoms occur on devices recent "synthesized", ie devoid of crystals to stabilize frequencies. In addition to being illegal on the HF frequencies that we, the pilots use, these units are designed to operate with power supply voltages stabilized (which retain 13.6 V to ± 10% accuracy). When your old car battery falls below 12 V, the synthesizer "unlock" and cause them trouble. By the way, on the old equipment crystallized, or even on the most recent or old fashioned portable, running on dry-cell batteries, a voltage drop will result in reducing the signal strength. But communication remain intelligible.
Good communications,
Conception R.B. senc
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