This TV transmitter will handle frequencies up to about 250MHz, so it will work perfectly if you have on your telly. In principle, the transmitter should work up to 500MHz or more, using the BF959 bipolar transistor. You should be able to generate a signal on UHF channel 21, but I have not (yet) tried […]
Posts tagged Transmitter
The circuit Tv transmitter very simple
The circuit is very simple, it just has three transistors, but the transistor types have been changed for VHF/UHF transistors. You can use 2N2369, BSX19 or BSX20, or any small signal transistor with an “ft” of typically 400MHz or more. The transistor DC biasing is a little more tolerant to varying transistor types than the […]
TV monitor diagram blog
TV monitor diagram blog
Relay Driver Control circuit
Relay Driver Control circuit using NE555, 741, 1N4001, SL100, D313, C106
Overload Indicator and overvoltage protection schematic
Overload Indicator and overvoltage protection schematic
MAX2642 MAX2643 high third-order intercept point low-noise amplifiers LNA
MAX2642/MAX2643 high third-order intercept point (IP3), low-noise amplifiers LNA are designed for applications in cellular, ISM, SMR, and PMR systems. They feature a programmable bias, allowing the IP3 and supply current to be optimized for specific applications. These LNA provide up to 0dBm input IP3 while maintaining a low noise figure of 1.3dB. The gain […]
