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45 Threads found on 108 Mhz
I would get a differential digital cmos gate, and generate a differential 108 mhz signal on the driver board, and then share it differentially with the other boards. Since the differential receiver/gate will have a relatively high impedance, you can load the line at each gate with a resistor placed differentially. OR you can just use the gates fo
Hello All, I have made a PCB Power Amplifier using transistor BLF177, refer to the datasheet this transistor will produce around 150 Watt with supply at 50Vdc. I want to share to you this PCB design, then you can build by your self at home. Firstly you should have the software, I use for this lay out using a Sprint PCB, you can search in goo
for TV 585-698mhz Used for TV broadcast 87.5-108 mhz is used for FM radio broadcasts 3600-10000 Space research, radio navigation
Hi, What is the maximum frequency of NXP 74HC393N?. In Datasheet, the max is 106 mhz. I used it for prescaler, the clock up to 108-110mhz. Can i get bigger frequency?
Why analog modulation, why 108 mhz? You are not allowed to use the FM broadcast frequency for data or private audio transmission, except for very short distance at ?W power, e.g. to feed your radio with recorded sound.
FM is normally 76-108 mhz if same phone should cover FM broadcast for most countries. Actually shown frequency band is limited by localized software. Embedded FM and TV antennas: 2G, 3G: Same multi-resonant antenna should cover 3 -5 frequency bands. Actual used frequency-bands differ in different
ILS localizer system use 108-112 mhz which is a relative narrow span, easily covered with a Yagi antenna. LPD have less gain and directivity for same amount of elements. LPD's can have wider frequency coverage, which is its main advantage compared to a Yagi antenna, but that is of no use for ILS. An array of 10-20 antennas located at the far end of
Put antena on L1. This FM transmitter circuit can be used as a wireless microphone, can be received by an ordinary 88- to 108-mhz FM broadcast receiver. For the power supply, this transmitter circuit is powered by a 9 V battery. To comply with the radiation limit of FCC rules, keep the antenna length under 12 inches. L1 is 6 turns of #24 wire
can anyone help me out with the theory of tent fractal antenna works in 88-108 mhz? really needs help :???:
Hi, im designing a SDR FM receiver (88-108 mhz), but im kind of new at this... so my question is: ***which filter of 88mhz is a good one? or just refer me to the page where i can buy it or give me an option of a good one... ***which low noise amp is a good one? ***which ADC is a good one? or just refer me to the page where i can buy (...)
is there any tutorial design fractal antenna operating at 88-108 mhz using hfss v.11?
Locating a FM transmitter consists of triangulation from at least two points in a territory. From both you find the azimuth angle, the transmitter should be located on the intersection of two-three azimuth lines. As the FM range typically is 88-108 mhz, a standard Yagi and dipoles may not be practical for a field operation. Try to use a loop or do
87.5-108 mhz is standard frequency band for FM radiodifusion called allso FM band or Band II. To receive radio stations in this band you can buy FM receiver or perhaps you allready have one.
It’s a project of recalculate old Technics tuner. Originaly tuner has UKF 65-73 mhz and after retune radio plays bad. No chance for good stereo. Besides it doesn’t display frequency between 88-108 mhz. I removed conve
hi, all. I need realize negative capacitor from 80mhz to 108 mhz by NIC using opamp, the opamp 3-dB bandwidth is 150mhz. But the negative cap can be got under 1.5mhz. Anyone can help to explain why?
Is the power delay profile dependent on the carrier frequency? I have read in many books that the delay spread for outdoor environment is in the order of 1 us. But that is for carrier frequency of around 900 mhz. (cellular communication). I need the power delay profile for FM transmission (88 – 108 mhz. range). Is the delay spread (...)
with my tuner quite high range I can hardly ear two radios if they are closer than 0.2 mhz so 108-88 = 20 mhz 5 radios per mhz gives you maximum 100 radios.
Has anyone an idea where i can find a bandpass filter in fm band range(88-108 mhz) and an IC amplifier working in the shame frequency range?
hi I'm looking for a FM synthethizer working in 80-108 mhz with step 200k please help me , I'm in emergency Regards
I have one project to design Power Spliter ( divider) at FM. I can design divider as Wilkinson with high frequency. At low frequency, I use R,L,C. It given good result (show below Figure ). However I wonder about it. 1> I simulated(ADS) without define Substrate. Like this when schematic with Substrate ( epsilon =4.3, h =1.58) result has change ???
In general FM is referring to the broadcast band, 88 mhz ? 108 mhz. The most suitable antenna from the ones you enumerate, could be a monopole (meander or whip) or a loop antenna.
an fm radio band transmitter that covered the full 87.5-108 mhz band and broadcasted a warning signal from ambulance car I don?t see where is the jammer in this case. Is just an unlincesed pirate radio. I think you have to understand first the definition of the jammer, and after that ask how to build one.
hello i need some informations about the caracteristecs of dipole which use it for the emission of radio FM (88-108) mhz . whith all my respect .
What is the limitation when changing a RX VCO operating frequency from 145 ~ 160mhz to 108 ~ 123 mhz? I tried to tune the tank circuitry but the frequency cannot go lower than 115mhz at lower frequency and there might be start up issue. Please advice.
To start learning RF i planned for one small signal 2 stage antenna preamplifier. Frequency range 88 -108 mhz.mhz. Accordingly i hv done the following according to the bias condition required. . I hv selected input transistor with following S parameters. f S11 S21 S12 (...)
Please give me link of any IC or page for a VCO or VFC as RX for FM radio 88mhz to 108 mhz as soon as possible
Please give me link of any IC or page for a VCO or VFC as RX for FM radio 88mhz to 108 mhz as soon as possible
Does anyone, know of successful microstrip implementations of antennae for commercial FM (76-108 mhz) broadcast? I am looking into the possibility of designing one for a wireless application. I know it?s hard but not impossible. I would appreciate references sources for antenna miniaturization techniques. My general web searches have not been s
hi i build a fm transmitter i need for frequency meter for fm transmitter to show frequency on lcd frequencies are:14mhz , 27 mhz , 88mhz-108 mhz
FM transmitters and amplifiers 150 w for the 3m (88-108 mhz) :D:D:D
v tried to assemble fm radio antenna amplifier ( 88~108 mhz) published in popular electronics. But unable to get it working. Anybody hv assembled it? or suggest some good circuit. Added after 2 minutes: here is the circuit
Hello guys!.. I want some reference material for Microstrip design technique issues. Also, how do i approach for designing my Microstip pcb if i have the specifications ready? The specifications are as follows: Frequency : 88 to 108 mhz Division : 2 way (0°) Insertion loss: 0.1 dB Isolation port to port : 25 dB Return loss (i/p
Hi, Anybody has a link for scematics/plan for a simple Car Radio Frequency Converter to be use on Japanese standard radio..76-90mhz to 88-108 mhz? BR rhonn
I want to design a fm transmitter, in the band commercial, 88mhz to 108 mhz, IN MY COUNTRY IS PERMITtET UP TO 5 KM , there is any IC that make all the fm transmiter or what circuit should iI use.
Any sugestion? I have tried 2N3866 and 2N4427 but i did not get close to 1 W.
Hi guys, Any sugestion for a varicap that can be use for the entire FM radio band. I have tried some but none of them can cover the entire range. It would be nice if Vtune is less than 3 v. Thank you
hi everyone..! there is attached below the schematic of a Traditional fm receiver circuit by the use of tda7000 ic fo use in the band 88 - 108 mhz Now is there anybody helping me in finding the values of L1 and L2 inductors of related filters with its calculation details i have used BB809 varactor with the datasheet also attached , instea
Hi, Please help me. I have problem from pll by MC145170. I use to PIC16F877 for C code control to PLL but it don"t work. If who have C sourcecode this project. Pls contact me. Thanks
I am student in Bangkok Thailand and i have to make a project. A FM Transmitter 88/108 mhz all is ok about HF I need to do the asm code for the PIC16Fxxx how will order the PLL MC145170 with a lcd module to read the frequency change step is 50khz Do you have somes information to help me? Maybe amateur radio use also pll (...)
I'm looking a good method to determine the exact position of a broadcasting FM transmiter (88-108 mhz), how can I determine or mesure angle from my receptor to the transmiter, with a minimal error??? I'm looking for circuits or schematics that can do this. Thanks
What's the meaning of the following specs? Thanks a lot. :) What does "M+S: 30%" mean? Residual modulation (what's this?) FM component: (AF 1 kHz, FM 75 kHz) ? 90 dB (10.7 ? 1/76 to 108 mhz) ? 80 dB (0.3 to 280 mhz) (BW 50 Hz to 15 kHz) (De-emphasis 50 ?s) AM component: (AF 1 kHz, AM 30 %) ? 65 dB (0.4 to 1.7 (...)
Hi Need circuit for converter 76-90 mhz to 88-108 mhz. for car radio Thanks. in advance :roll:
i want to know which mosfet will be best to design 100W power amplifier in the frequency range of 88 mhz to 108 mhz. thanking you.
help where is the FM PLL (88 mhz - 108 mhz) with pic 16F8XX sch or asm code
When simulating the radiation pattern of an antenna using NEC, we nomally get slight different patterns over a certain bandwidth (e.g. 108-118mhz). However, the measured radiation pattern could be quite different cross tha band. How to explain this phenomena? Thanks.