audmod01
Super Member
Matt;
I don't think so. The problems with my hand unit are two-fold. Most importantly, the amplitude of the output signal is much lower than that of your hand unit with an OEM transducer. Second, the replacement transducer I bought has metallized Mylar film which is too thick, thus preventing adequate 60Hz modulation from the oscillator circuit. So the only real solution is to have a transducer that is fully capable of higher energy output (by providing the proper capacitive load & Impedance to the oscillator circuit) and capable of responding well to the 60Hz component when selecting tune down or volume down functions.
If I could change the modulating frequency from 60Hz to say 1kHz or so, it might be possible to change the reverse tune or volume down function detection to work with a 1kHz modulation, however even that may be a problem. I will have to see what I can do toward rebuilding the OEM transducer first. If I am unsuccessful, then I may pursue another approach. It may still be possible to create a new hand transmitter using 555 timers as I had mentioned before. I have plenty of them on hand and could probably create a toroid transformer to step up the output voltage sufficient to drive a transducer to a high enough level to guarantee good distance operation of the system. I would say that the system should be capable of sending and receiving a signal up to 30ft. to be adequate for most room situations.
Joe
I don't think so. The problems with my hand unit are two-fold. Most importantly, the amplitude of the output signal is much lower than that of your hand unit with an OEM transducer. Second, the replacement transducer I bought has metallized Mylar film which is too thick, thus preventing adequate 60Hz modulation from the oscillator circuit. So the only real solution is to have a transducer that is fully capable of higher energy output (by providing the proper capacitive load & Impedance to the oscillator circuit) and capable of responding well to the 60Hz component when selecting tune down or volume down functions.
If I could change the modulating frequency from 60Hz to say 1kHz or so, it might be possible to change the reverse tune or volume down function detection to work with a 1kHz modulation, however even that may be a problem. I will have to see what I can do toward rebuilding the OEM transducer first. If I am unsuccessful, then I may pursue another approach. It may still be possible to create a new hand transmitter using 555 timers as I had mentioned before. I have plenty of them on hand and could probably create a toroid transformer to step up the output voltage sufficient to drive a transducer to a high enough level to guarantee good distance operation of the system. I would say that the system should be capable of sending and receiving a signal up to 30ft. to be adequate for most room situations.
Joe