90-125 Mhz Crystal RF Oscillator

  
Inside:
Repository
This is a circuit of 90-125 MHz Crystal which is very useful for VHF/UHF converters. This circuit provide 5 to 15 mW output. High-quality fifth- or seventh-over-tone crystal type can be used in this circuit. Undesired oscillation never reach above 500 MHz because of Ferrite bead FB. Using regulated power supply and allowing crystal to operate at i
90-125 Mhz Crystal RF Oscillator - schematic

ts natural series-resonant frequency, will give best stability. Here is the schematic diagram of the circuit: The C1 is a 10pF mica. For C2, use as high value as possible such as 20 to 60pF mica. A 20 pF miniature trimmer or piston is used for C3. The value of L1 is 8 turns no 24(0. 5mm) on amidon T37-12 toroid core, tapped 3 turns fro cold end. For Q1, we can uses 2N5179, 2N2857, 2N3563m 2N918 or equivalent but fairchild 2N5179 is recommended. The value of The RFC is 0. 39 H which resonate with crystal holder capacitance. The maximum length of Y1 is 6mm or 1/4 ³. The value of Y1 is 90 to 125 MHz, 5th or 7th overtone, series-resonant, HC-18/U crystal. [Circuit`s schematic diagram source:J. Reisert, VHF/UHF Techniques, Ham Radio, March 1976, p 44-48] We aim to transmit more information by carrying articles. Please send us an E-mail to wanghuali@hqew. net within 15 days if we are involved in the problems of article content, copyright or other problems. We will delete it soon.



Recommended videos


  • Pierce crystal oscillator and oscillator circuits
    Duration: 7:27.
  • #123: Build a crystal oscillator from schematic thru prototype construction and testing - DIY
    Duration: 14:20.
  • DIY RF Signal Generator
    Duration: 21:22.

News


  • KMBZ
    SchoolA federal judge earlier had issued a permanent injunction that barred the college from universally drug screening all students. The 8th ruling upheld the judge's permitting the college to drug test students in five programs involving
     21 January 2017
  • The Daily Tribune
    The Daily Tribune
    The Daily Tribune Chavonne Taylor is escorted into Judge Kathryn Viviano's courtroom in Macomb County Circuit Court for Taylor's insanity plea hearing. Ray Skowronek--The ...
     21 January 2017
  • Forbes
    Forbes : Samsung Reveals Galaxy S8, New Nokia Sells Out, Deciding On The S8 Launch DateTaking a look back at seven days of news and headlines across the world of Android, this week's Android includes Samsung's reveal of its Galaxy S8 fla
     21 January 2017
  • Wall Street Journal (blog)
    Wall Street Journal (blog) Talent Pool: Make It GreatAs president, Mr. Trump must share his “do well” message with the country's 7.5 million information professionals who carry a legacy of “incredible innovation”
     20 January 2017
  • TWN
    TWN Stocks Flagged As Top Movers: Jabil , Inc. (NYSE:JBL), Yandex N.V. (NASDAQ:YNDX)Sell-side analyst recommendations point to a short term price target of $24.55 on the shares of Jabil , Inc. (JBL). The consensus rating is 2.6, suggesti
     19 January 2017
  • The Independent Republic
    Stocks To Look Out For: Ciena (CIEN), Jabil (JBL)Ciena Corporation (CIEN) ended last trading session with a change of 0.97 percent. It trades at an average volume of 2.75M shares versus 1.71M shares recorded at the end of last trading sess
     19 January 2017
  • The Independent Republic
    Baxley Report Stocks To Look Out For: Jabil , Inc. (JBL), Extreme Networks, Inc. (EXTR)Jabil , Inc. (JBL) ended last trading session with a change of 0.81 percent. It trades at an average volume of 2.11M shares versus 1.17M shares record
     16 January 2017
  • Moneycontrol.com
    locked at 5% upper on IT project from US GSATrigyn locked at 5% upper on IT project from US GSA. Shares of Trigyn were locked at 5 percent upper at Rs 111.50 on Thursday after its subsidiary received IT contract from the independent ag
     12 January 2017
  • PCWorld
    gets upgrade after 35 yearsInside wearables, smart devices, robots, and computers like Raspberry Pi are communications buses called I2C (Inter Integrated ), which date back to 1982, and SPI (Serial Peripheral Interface), which was born in 1
     10 January 2017

.