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1.what do you mean the antenna needs to be optimized?mvs sarma said:Hi,
the possible answers are
1. yes - with a fixed cap the frequency tuned will be fixed- but the antenna should be optimized for that.
2. your cardless telephones are nothing but FM trancivers at 49MHz,90MHz, or 2.4GHz
Sarma
There are hundreds of simple FM transmitter circuits on the web. Some work, some don't. Some work well, some work lousily.maor said:i would really like a circuit that i can make.
stevez said:I've seen numerous FM transceiver projects described in amateur radio publications over the years. The ARRL Handbook is published annually - check 1960s and 1970s editions. I'll state what might be obvious to some - that these projects are aimed at licensed radio amateurs. You will find that transmitter characteristics and frequencies can be different for each country.
maor said:1.what do you mean the antenna needs to be optimized?
2.i would really like a circuit that i can make.
stevez said:Permeability Tuned Oscillator (PTO) was employed by a number of amateur radio equipment manufacturers - in addition to the car radios mentioned. I do not recall what the benefits were over a variable capacitor except that it might have simplified the mechanical construction.
stevez said:Permeability Tuned Oscillator (PTO) was employed by a number of amateur radio equipment manufacturers - in addition to the car radios mentioned. I do not recall what the benefits were over a variable capacitor except that it might have simplified the mechanical construction.