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M2 Antenna Systems 678-14 Manual

Tv channel 48-14

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SPECIFICATIONS:
Model ......................................... 678-14 (CH48-14)
Frequency Range ....................... 674-682 MHz
Usable Frequency Range .......... 650-684 MHz
*Gain .......................................... 16.8 dBi
Front to back .............................. 25 dB Typical
Feed type ................................... Folded Dipole
Feed Impedance. ....................... 50 Ohms
Maximum VSWR ........................ 1.2:1 Typical
Polarity ....................................... Vertically / Horizontally
Input Connector .......................... "N" Female
FEATURES:
The 678-14 (CH48-14) is designed for deep fringe UHF TV reception where smaller Yagi's and wide band compromise
antennas just don't cut it. The antenna enables the "Polarity Flexibility" in any given application. Low cost yet
manufactured for dependability, the 678-14 (CH48-14), the folded dipole, provides a virtual flat match for over 10+ MHz.
The gain has been designed to roll-off quickly above range limits to prevent receiver overload from high power adjacent
channel interference. The heavy duty two piece boom and 3/16" elements, provide superior performance and longevity.
The 678-14 (CH48-14) is a DC grounded antenna designed to help protect receiver front ends from lightning and static.
Specialized single and multiple channel antennas are available for all TV and FM bands.
M2 Antenna Systems, Inc. 4402 N. Selland Ave. Fresno, CA 93722
M2 Antenna Systems, Inc.
Model No: 678-14 (TV CHANNEL 48-14)
*Subtract 2.14 from dBi for dBd
Tel: (559) 432-8873 Fax: (559) 432-3059 Web: www.m2inc.com
©2022 M2 Antenna Systems Incorporated
Power Handling .......................... 500 Watts
Boom Length / Dia ...................... 80" / 1" - 3/4"
Stacking Distance ....................... E=42" / H=41"
Mounting ..................................... 1-1/4" to 2" Nom.
Wind area / Survival ................... 0.5 Sq. Ft. / 100 MPH
Weight / Ship Wt. ........................ 4 Lbs. / 6 Lbs.
08/22/22

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Summary of Contents for M2 Antenna Systems 678-14

  • Page 1 The heavy duty two piece boom and 3/16” elements, provide superior performance and longevity. The 678-14 (CH48-14) is a DC grounded antenna designed to help protect receiver front ends from lightning and static. Specialized single and multiple channel antennas are available for all TV and FM bands.
  • Page 2 678-14 (CH48-14) DIMENSION SHEET CHAN-48 -14 (HI-PERFORMANCE 674-680 MHZ YAGI) DIMENSION SHEET REAR ELEMENT ELEMENT SPACING LENGTH 8.375 0.000 FOLDED DIPOLE DRIVEN ELEMENT 3.250 7.750 5.875 7.437 10.437 7.313 16.062 7.188 22.874 7.125 29.625 7.062 36.937 DECIMAL TO FRACTION CONVERSION 7.188...
  • Page 3 678-14 (CH48-14) ASSEMBLY MANUAL GETTING STARTED Tools handy for assembly process: Phillips head screwdriver, 11/32” nut driver or socket, 7/16” end wrench or socket. Start by checking the parts needed to complete the assembly. You should have the following parts below: 1.
  • Page 4 Continue this procedure until all elements are locked into place. THIS COMPLETES THE ASSEMBLY OF THE 678-14 (CH48-14) 678-14 (CH48-14) PARTS LIST 10-12-05 DESCRIPTION ................QTY BOOM, 1.0”...