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Radio circuit diagrams
September 27, 2010
ICs that in the past were far too expensive for the hobbyist tend to be more favourably priced these days. An example of this is the AD8099 from Analog Devices. This opamp is available for... [more]
circuit from:http://www.extremecircuits.net/2010/05/opamp-vhf-fm-transmitter.html
September 27, 2010
The range of this FM transmitter is around 100 meters at 9V DC supply. The circuit comprises three stages. The first stage is a microphone preamplifier built around BC548 transistor. The next stage is a... [more]
circuit from:http://www.extremecircuits.net/2010/05/range-of-this-fm-transmitter-is-around.html
June 24, 2010
The AM signal is captured by the antenna , 10 mt long horizontal wire, WELL insulated from earth (I mean distant, to lower the stray capacitance coupling with ground which will adsorb some signal ).... [more]
June 23, 2010
As it appears in the analytic drawing the amplifier is manufactured with transistor TR1, type BLY90 of Philips. The transistor this is specifically drawn for operation in frequencies up to 175MHZ, with very good results... [more]
June 23, 2010
A amplifier of medium force RF for the FM, is always essential for the amateur that wants it strengthens some small transmitter, that likely it has already it manufactured! The present circuit can give force... [more]
June 22, 2010
AM FM Simultaneous Transmitter Using Digital IC [more]
June 22, 2010
This SMD FM transmitter has an operating frequency of about 80 to 115MHz. Under reasonable circumstances you will be able to receive its signal at a distance of about 200 meters. [more]
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