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Re: Invro FM Radio Re: Earpiece Radio	Questions Do all earphone radios have low power consumption? Why does the Invro Earpiece Radio have mono (monaural) reception? Can the Invro Earpiece Radio drive a stereo headset? Where is the antenna on the Invro Earpiece Radio? Why does the Invro Earpiece Radio use an AA battery? Does the Invro Earpiece Radio have a programme search facility?
	Answers Do all earphone radios have low power consumption? No, they vary considerably. The power required to drive an earphone is very small, but some FM receiver circuits can consume quite a bit of power, depending on the type of circuit used. Top of page Why does the Invro Earpiece Radio have mono (monaural) reception? Stereo FM reception often produces unsatisfactory performance whereas mono reception is much more reliable. Since we are anticipating that the major use of this radio will be with a single earphone we are concentrating on achieving best (mono) reception. Top of page Can the Invro Earpiece Radio drive a stereo headset? Yes, but with a mono signal. Top of page Where is the antenna on the Invro Earpiece Radio? The earphone doubles up as an antenna. Top of page Why does the Invro Earpiece Radio use an AA battery? AAA batteries are less common and AA batteries usually represent better value for money (in terms of energy per unit of currency). C batteries are too big. PP3 batteries deliver too much voltage for this application (9Volts) and the cost of energy in this format is very high. Top of page Does the Invro Earpiece Radio have a programme search facility? No, that type of radio consumes more power. Also, we feel that users like to be able to spin a tuning dial and hear quickly which stations are available. Top of page
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