Another change we made was that we added more telescopic sections to enable the FM antenna to be packed in a box only 60 cm in length. This allows us to send the antenna as a small packet through the postal system and therefore keep the antenna quality high, the delivery cost low and the overall price competitive and good value for money.
Nov 16, 2016 · This fm transmitter circuit is very simple and it has a acceptable transmission. The signal transited from this fm transmitter circuit can be received at almost 300 meters in open air The circuit require a 3volts operating voltage and can be tuned anywhere in the FM band. Low-Cost 3 volts FM Transmitter Circuit Diagram:
FM, SSB, AM etc. 300W PEP = 300W of power for FM or AM. 300W PEP = approximately 100W of power on SSB however 300W PEP on sideband will have the same peak voltage as 300W of carrier. The amount of compression used on SSB is also irrelevant. Table 2 - Air gaps required for voltage separation of various components.
Normally the dipole system clamps as high off the ground as possible to a mounting pole of at least 4 meters in length and between 25 and 38mm in diameter which you need to provide and engineer yourself.
This formula is for the antenna wire. Of course if you build your antenna out of the tube, total length of the antenna will be shorter, for example I have found that 21.5 feet seems to provide maximum benefit to the frequency of 28.5 MHz when using a 1 "tube, and 22.5. Foot seems be the best long-wire at the same frequency.
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