Archive for May, 2008
Tv antenna amplifier circuit schematic 1
A very simple and cheap tv antenna amplifier circuit built with BF961 a N–Channel Dual Gate MOS common transistor used for input- and mixer stages especially for FM- and VHF TV-tuners up to 300 MHz.
Bellow you have the antenna tv amplifier schematic and here is the BF961 datasheet.
L1 = L2 = 5turns / 0.8mm [...]
BF961 datasheet specifications
BF961 is a N–Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode.
BF961 Applications:
Input- and mixer stages especially for FM- and VHF TV-tuners up to 300 MHz.
Features:
Integrated gate protection diodes
High cross modulation performance
Low noise figure
High AGC-range
Low feedback capacitance
Low input capacitance
BF961 datasheet
One transistor audio mixer
The simpliest audio mixer schematic on the net. It has only one transistor and can support as many audio signal as you can afford. BC109C is a very cheap transistor and with a few resistor and capacitors you can build quickly a simple audio mixer that you can use in your pirate radio or wherever [...]
