TWNC-7604-2, Notch Cavity Filter 763-869 MHz


  • Dual Notch Cavity
  • Tuning Frequency Range: 763-869 MHz
  • Input Power (max): 350 watts
  • Insertion Loss (max): 0.2dB
  • VSWR at Resonance (max): 1.5:1

Please add frequency range (MHz) in a message box below. If you order more than one unit and want to have a different frequency for each unit, please let us know the product quantity for each frequency in the message box below too.

SKU: TWNC-7604-2 Categories: , Tags: ,

Product Description

The Telewave TWNC-7604-2, Notch Cavity Filter 763-869 MHz, is dual 4” diameter, ¼-wave length notch cavity with an adjustable coupling loop. Notch cavities are typically used together with Pass or Pass/Reject cavities to eliminate a particular frequency. Notch cavities have very low loss outside the notch band. Telewave can also “tilt” the notch response to move a notch very close to a pass frequency without adversely affecting the pass response.

TWNC-7604-2 cavities cover 763-869 MHz. All cavities are tuned to specified frequencies prior to shipping, and no further adjustments should be required. The positive locking mechanism allows for quick field re-tuning if frequency changes become necessary. These cavities feature calibrated adjustable coupling, which can be easily changed to improve selectivity. This allows cavity response to be optimized for any operating environment. At densely populated sites TWNC-7604-2 filter provides greater selectivity with minimum insertion loss. Multiple cavities can also provide a wider notch when required. Mounting rails are provided for all multiple cavity filters.

Excellent frequency stability is achieved by the use of a specially machined compensator and Invar rod. The pass and reject frequencies are temperature stable from -30°C to +70°C. Telewave Ground Loop technology places the center conductor of each coupling loop at DC ground potential for lightning protection and noise reduction. Heavy duty materials are used throughout each cavity to ensure high performance and long life. Cavity top and bottom plates are machined from ¼-inch aluminum, and are heliarc welded to the cavity body for improved conductivity and strength. This allows Telewave cavities to handle up to 350 watts. Similar metals and alodined aluminum help prevent galvanic corrosion. Silver plated tuners and beryllium copper finger stock provide non-corrosive low loss contact, and ensure reliable, long term performance.

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Contact Telewave Sales for current lead time and shipping information: / 800-331-3396 Opt 1

Contact Telewave Sales for current lead time and shipping information: / 800-331-3396 Opt 1

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