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2 Results Found For "noise"
DX Engineering Ferrite
DX Engineering Ferrites are partially magnetic metal and ceramic mixes available in a variety of forms, including toroid core, bead type and plastic-covered split-bead ferrite called snap-beads. They are used in a myriad of RF suppression applications to mitigate RFI (radio frequency interference) as well as to reduce pulse and other types of RF noise interference. Special ferrites are used for experimentation and electronic circuit building and for making transformers, RF chokes and antenna baluns. The variations of magnetic and non-magnetic metals and non-metal ceramics used to make ferrites are called "Mixes" and each has different radio frequency properties or ranges. Therefore, different mix number ferrites are typically used for different applications within those ranges, determined by decades of experiments by engineers and applications by hams. Each Mix has been assigned a color code to help identify the ferrite, so numerical labeling is not used on the metal. Color coded ferrite can be identified long after the numbered package is discarded or has disintegrated with time. How do they work? Simply use snap-on beads on a cable or wire. An even more effective choke takes a few to several turns of a wire or cable through and around a ferrite snap-on bead or toroid core. This mitigates RFI to, or from, the connected RF noise producing or noise affected electronic device. The results can be very surprising. Solving noise and RFI can be frustrating. Due to the nature of RF and noise interference suppression; the techniques of appropriate use of ferrites can take a bit of trial and error, but are often the best solution for a difficult problem. Use DX Engineering Ferrite for an incredible range of electronic circuits, noise abatement and RF suppression projects. The details of DX Engineering Ferrite mixes and types appear in each product description. Sizes and applications are discussed in "More Details" and in the literature available at the "Documentation" tab of each of these products.
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$106.99
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$116.99
I0JXX SEQJXXBOX Sequencers
I0JXX SEQJXXBOX Sequencers are advanced switching control units for preamplifiers, power amplifiers, transceivers and transverters typical of VHF, UHF and SHF amateur and commercial radio systems. When using independent low-noise mast-mounted or inline preamplifiers and inline power amplifiers, the correctly sequenced timing of PTT and disconnect signals must be sent before keying a transceiver or transverter. The required task of preventing preamplifier burnout, power amplifier hot switching and potential relay damage is very well handled by the SEQJXXBOX. Featuring independently configurable time delay sequencing for SSB and CW modes, the SEQJXXBOX has four separate output relays which are tied in series to ensure the proper switching sequencing of every critical component in the receive-transmit chain. Configurations and functions are entered with a four-button control and Status info in RX and TX is displayed on a 2x16 alpha-numeric blue-tone readout. Independent front panel switches for turning on or off the Preamp, the Power Amp, and the Sequencer, along with programmable control over CW Break-In and relay timing provides intuitive and helpful operational flexibility. Two rear panel 8-screw barrier strips handle all input and outputs, so simple stripped lead wiring is required from all peripheral components. A simple Foot Switch for SSB PTT is provided with each unit. FEATURES of the I0JXX SEQJXXBOX Sequencer: • Switching delay time RX>TX TX>RX Every mode from 50 to 500 mS (step 10 mS) • Switching delay time CW TX>RX from 100 to 900 mS (step 100 mS) • CW Break-In operations configurable (enabled by default) • Name or Call Sign on display (up to 6 alphanumeric characters) • Display lighting 2 modes: always on / on only during configuration SPECIFICATIONS of the I0JXX SEQJXXBOX Sequencer: INPUT: MIC-PTT (foot switch) CW-KEY (3 contacts, straight key or Iambic paddle Display: LDC 2 lines per 16 letters, blue color (with contrast adjustment) Menu access: 4 front panel pushbuttons Power Requirement: 12 VDC @ 180 mA TX; 40 mA RX. (No internal battery) Dimensions, WHD: 3.937 x 1.969 x 4.331in. (100 x 50 x 110mm) Weight: 1.343 lbs. (650 g) The I0JXX SEQJXXBOX is an indispensable tool for proper and successful operation of each crucial component in a VHF, UHF, or SHF station.
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$229.99