Skema Rangkaian Long Range FM transmitter |SKEMA RANGKAIAN E... http://skema-rangkaian-elektronika.blogspot.com/2009/11/skema-rangkaia...
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Skema Rangkaian Long Range FM transmitter |SKEMA RANGKAIAN E... http://skema-rangkaian-elektronika.blogspot.com/2009/11/skema-rangkaia...
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Electronic
The power output of most of these circuits are very low because no power amplifier Components
stages were incorporated. RF Parts offers
Semiconductors,
The transmitter circuit described here has an extra RF power amplifier stage, after the
Transistors, Diodes &
oscillator stage, to raise the power output to 200-250 milliwatts. With a good matching more.
www.rfparts.com
50-ohm ground plane antenna or multi-element Yagi antenna, this transmitter can
provide reasonably good signal strength up to a distance of about 2 kilometres. Coil Bobbins
The circuit built around transistor T1 (BF494) is a basic low-power variable-frequency Inch and Metric coil
VHF oscillator. A varicap diode circuit is included to change the frequency of the bobbins 5000+
Microplex (MPX)
standard range
transmitter and to provide frequency modulation by audio signals. The output of the Project
available
oscillator is about 50 milliwatts. Transistor T2 (2N3866) forms a VHF-class A power www.milesplatts.co.uk (09 Oct 2009)
amplifier. It boosts the oscillator signals’ power four to five times. Thus, 200-250 EMI Shielding (0 comments)
milliwatts of power is generated at the collector of transistor T2. LOW-COST HEARING
Solutions
Circuit Board Shields, AID Schematic
For better results, assemble the circuit on a good-quality glass epoxy board and house
EMI Gaskets, Ferrites, (01 Nov 2009)
the transmitter inside an aluminium case. Shield the oscillator stage using an
RF Absorbers for (0 comments)
aluminium sheet. EMI/RFI LM723 Peak Level
Coil winding details are given below: www.LeaderTechInc.com
Indicator Circuit
L1 - 4 turns of 20 SWG wire close wound over 8mm diameter plastic former. Amateur TV ? (01 Nov 2009)
Random Circuits...
L2 - 2 turns of 24 SWG wire near top end of L1. Receivers (0 comments)
(Note: No core (i.e. air core) is used for the above coils) Transmitters
L3 - 7 turns of 24 SWG wire close wound with 4mm diameter air core. Controllers PLL for
Comtech Modules Skema Rangkaian Amplifier 18W
L4 - 7 turns of 24 SWG wire-wound on a ferrite bead (as choke) www.13cm.co.uk 50Watt LM3876 Power Amplifier
Potentiometer VR1 is used to vary the fundamental frequency whereas potentiometer Circuit
VR2 is used as power control. For hum-free operation, operate the transmitter on a SoftWright LLC
Microplex (MPX) Project
Terrain Analysis
12V rechargeable battery pack of 10 x 1.2-volt Ni-Cd cells. Transistor T2 must be
Package - TAP Radio 500W Mos-Fet Power Inverter
mounted on a heat sink. Do not switch on the transmitter without a matching antenna. Coverage/Microwave SKEMA RANGKAIAN UPS MINI
Adjust both trimmers (VC1 and VC2) for maximum transmission power. Adjust Software
www.softwright.com SKEMA RANGKAIAN EQUALIZER 5
potentiometer VR1 to set the fundamental frequency near 100 MHz.
BAND
This transmitter should only be used for educational purposes. Regular transmission
LOW-COST HEARING AID
using such a transmitter without a licence is illegal in India
Schematic
RELATED CIRCUITS... Rangkaian FM Transmitter Mini
Coil Bobbins MOSFET BUZ902DP 400Watt
Inch and Metric coil
Audio Power Amplifier
bobbins 5000+
standard range Rangkaian S-video Converter
available Circuit
www.milesplatts.co.uk
S t er e o FM G A M BA R Ran gkaian EMI Shielding
Tr an smitt e S KE M A Fm Solutions
r W ith RA NGKA IA N Transmitt e Circuit Board Shields,
BA 1404 I. . . FM r 1W
EMI Gaskets, Ferrites,
TRA NS M ITT
RF Absorbers for
...
EMI/RFI
www.LeaderTechInc.com
FM Radio and TV
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Koleksi Skema Rangkaian|Artikel Elektronika
Rangkaian Power Amplifier BTL - There is an power amplifier circuit of a BTL SoftWright LLC
system, which comprises a first op-amp chip which outputs an output signal Terrain Analysis
having a same phase as an input sig... Package - TAP Radio
1 minggu yang lalu Coverage/Microwave
Software
www.softwright.com
Portable Signal
2 of 3 11/4/2009 3:47 PM
Skema Rangkaian Long Range FM transmitter |SKEMA RANGKAIAN E... http://skema-rangkaian-elektronika.blogspot.com/2009/11/skema-rangkaia...
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