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I0JXX LNA Receive Preamplifiers
I0JXX LNA Receive Preamplifiers offer high gain amplification with very low internal noise for VHF and UHF amateur band optimized devices used world-wide by experimenters and contest enthusiasts. Excellent receive-only performance at low current is achieved by these compact 12VDC units, available in two connector configurations: SMA female input and output, or Type N male input and female output. LNA (low noise amplifiers) offer preamplification using ultra-low noise components as good or better than most receiver front ends, to preserve the capabilities of a low-noise antenna system. Typically, they do not have relays in the signal path that might introduce noise or loss. These devices can be used directly in most receive applications and may be used to build a sequencer-controlled Receive-Transmit relay system for two-way VHF or UHF communications. I0JXX LNA Receive Preamplifiers are built with high quality components including low-loss FR4 copper clad PCBs and environmentally safe tri-chrome high-conductivity passivated aluminum chassis. View the specific device specifications on each part detail page.
Not Yet Reviewed
$191.99
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$223.99
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.
Not Yet Reviewed
$229.99
I0JXX Power Dividers
I0JXX Power Dividers serve as RF combiners and splitters for 50 ohm VHF/UHF and EHF antennas and feedlines. They are hand-tuned with advanced test equipment to achieve the specified frequency range. I0JXX Power Dividers are made with Type N and 7-16DIN female common connectors and precision Type N antenna port connectors for extremely low loss and constant impedance. They are constructed with aluminum tubing and solid metal center conductors to make air dielectric coaxial lines with nearly immeasurable insertion loss. Power Dividers are used in VHF and UHF multi-Yagi stacked arrays to impedance match two, three, four, six or eight horizontal Loop or Yagi antennas. Standard low-loss 50 ohm coaxial cable Type N male assemblies, each the exact same length are required from each antenna feedpoint to its respective power divider port. But phased wavelength cables are not required. All Yagis or horizonal loops are fed together in phase, separated by the proper stacking spacing, and pointed in the same direction. As compared to a single antenna, stacked Yagis can yield 3 dB gain for two antennas and practically 6 dB gain for four antennas, with only minor losses deducted for the feedlines, connectors and the power divider. Each pair of stacked antennas nearly doubles the effective radiated power of the station. Available now at DX Engineering, I0JXX Power Dividers offer a superior way of combining and splitting RF in stacked Loop or Yagi arrays.
Not Yet Reviewed
$127.99
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$228.99