Showing results: 16 - 30 of 31 items found.
-
FB7-NX -
National RF, Inc
In about 1935, the National Radio Company of Malden, Mass., brought out a “hot” high frequency receiver, called the FB7, and the subsequent FB-7X. It featured a super-hetrodyne design with plug-in coils that gave it a broad frequency range. The “X” model also incorporated a crystal filter in the intermediate frequency section, thus giving it additional selectivity. The receiver was viewed by radio amateurs as a technological breakthrough, and it was also used commercially for point to point high frequency communications. As the receiver did not have an internal RF amplifier section, a separately tunable RF amplifier was later provided in a separate enclosure for additional performance capabilities. Now, National RF, Inc., is resurrecting the fabled receiver name with an all solid-state, hot mini receiver, which also utilizes plug-in coils to cover the HF spectrum. The mini-receiver is designed for use by radio amateurs as well as serious short-wave listeners, and allows reception of AM, CW, and SSB signals. It incorporates a super-hetrodyne design with a dual gate FET built-in RF preamplifier and a ceramic filter for selectivity, often required when used in a crowded amateur radio band. In addition, the receiver has a buffered rear panel output of the high frequency oscillator for use with either a frequency counter for exact receive frequency display, or for interface with an outboard transmitter. A rear panel jack is also provided for muting the receiver when a transmitter is placed into the transmit mode. And, the receiver is small enough to fit into carry-on luggage and taken on trips when it is desired to “keep an ear” on amateur radio or other high frequency activity. The receiver utilizes rear panel plug-in coil assemblies which contain the RF amplifier, mixer, and oscillator tuned circuits. Each plug-in coil assembly also comes with a separate dial scale, which is inserted onto the front panel for displaying the tuned frequency. A very smooth 6 to 1 planetary drive is used for tuning the receiver. Other front panel controls include RF preamplifier peak, volume control, Beat Frequency Oscillator adjustment, and RF gain control. Other switches include filter bandwidth, AM/CW/SSB selection, Power, and a general coverage/band spread control for certain plug-in assemblies. The receiver is intended to drive head-phones via a rear panel jack, but has sufficient output to drive a small external speaker.
-
Type NLF-2 -
National RF, Inc
A Hot, Active, Noise Reducing Antenna System that will sit on your desk and copy 2200, 1700, and 600 through 160 Meter Experimental and Amateur Radio Signals!
-
RKR Designs LLC
Fully automatic, legal limit plus headroom amplifierAlpha’s low-drive, tube amplifier design delivers the cleanest possible signalOperates on all Amateur Radio Bands 160M thru 10MSingle, easy to find, inexpensive 3CX1500A7 8877 type tubeInternal, automatic 4 port antenna switch capable of combining any 2 antenna portsAlpha’s Legendary service and support4 year limited warranty on hardware, 1 year on tube1500W, 100% duty cycle, no time limitation, key down foreverRugged construction built to last
-
Kuhne electronic GmbH
Bias Tee for remote power supply of preamplifiers and converters via the coaxial cable.
-
Kuhne electronic GmbH
First approach is to generate the high frequency directly, at the fundamental, using an oscillatortuned on the desired frequency. Few sensitive issues appears here due to high working frequency as, stability, jitter, phase noise, pulling, pushing, low output power, and cost of the active component to meet the performances
-
PROMAX Electronica
Monitoring instrumentation, emission and control of RF emissions for operators, laboratories, radio amateurs, technical schools, etc.
-
Kuhne electronic GmbH
An oscillator is an electronic circuit designed to produce either audio or radio frequency signals. These will generally have sineusoidal wave form, but other wave shapes such as square and sawtooth are possible. In radio equipment oscillators will always have a low output power, and if a radio frequency is produced, the oscillator is acually a basic radio transmitter.
-
Kuhne electronic GmbH
Is a radio beacon, whose purpose is the investigation of the propagation of radio signals. Most radio propagation beacons use amateur radio frequencies. They can be found on LF, MF, HF, VHF, UHF, and microwave frequencies. Microwave beacons are also used as signal sources to test and calibrate antennas and receivers
-
OM2000A+ -
Array Solutions
Thank you for purchasing this new model of the OM Power’s RF power amplifiers line for HF and 50 MHz amateur radio bands. You now own, the OM2000A+, an automatic unit with no knobs, no rotaryswitches on the front panel, just two small switches and one large touch display.Smart design, modern conception, high reliability is the result of OM Power’s development and many years of experience with overall solutions and special attention with the design of the protection circuits.This product is covered by two years of warranty on the amplifier itself and one year for the tube.We wish you will have many years of trouble-free use of this equipment, lots of fun and successful contacts in the world of amateur radio.
-
Kuhne electronic GmbH
From classic equipment for simple QSOs to high performance modules for contests, EME-operations and satellite radio: Our products provide absolute top performance. When choosing their equipment many radio amateurs and club-stations don't compromise and trust in the proven quality of Kuhne electronic amplifiers. Numerous contest victories, records and first contacts with a country were and are achieved with Kuhne products. Our amplifiers are remarkable for high gain and high linearity. LD-MOSFET and GaAs-FET-systems are the state-of-the-art technology in the amateur sector and enable the perfect use for all analog and digital modes (e.g. SSB, CW, WSJT, ATV, DATV). Small mechanical measurements and milled aluminum cases enable high temperature stability and tower mounting. Don't compromise and get technology from Kuhne electronic!
-
Kuhne electronic GmbH
. Internal filters provide high spurious rejection and image rejection. Due to low phase noise and high frequency stability of the local oscillator at 3000 MHz, the up converter is suitable for analog and digital communication systems.Typical applications are Multichannel Multipoint Distribution Systems (MMDS) using QPSK modulation and DVB?T or DVB?S systems. The output power of 20 mW can be increased to several watts by the use of an additional power amplifier.
-
784040-01 -
NI
70 MHz to 6 GHz, 2-Channel USRP Software Defined Radio Device - The USRP‑2901 is a tunable RF transceiver with full-duplex, MIMO operation. It offers bus-powered connectivity with USB 3.0 or USB 2.0. You can also use the NI USRP‑2901 for the following communications applications: white space; broadcast FM; public safety; land-mobile, low-power unlicensed device (ISM) bands; sensor networks; amateur radio; or GPS.
-
784039-01 -
NI
70 MHz to 6 GHz USRP Software Defined Radio Device - The USRP‑2900 is a tunable RF transceiver with full-duplex operation. It offers bus-powered connectivity with USB 3.0 or USB 2.0. You also can use the NI USRP‑2900 for the following communications applications: white space; broadcast FM; public safety; land-mobile, low-power unlicensed device (ISM) bands; sensor networks; amateur radio; or GPS.
-
781910-01 -
NI
20 MHz Bandwidth, 50 MHz to 2.2 GHz, Included GPS-Disciplined OCXO, USRP Software Defined Radio Device - The USRP‑2930 is a tunable RF transceiver with a high-speed analog‑to‑digital converter and digital‑to‑analog converter for streaming baseband I and Q signals to a host PC over 1 Gigabit Ethernet. It also features a GPS-disciplined oscillator (GPSDO) with PPS accuracy of ±50 ns. You also can use the NI USRP‑2930 for the following communications applications: white space; broadcast FM; public safety; land-mobile, low-power unlicensed devices on industrial, scientific, and medical (ISM) bands; sensor networks; cell phone; amateur radio; or GPS.
-
781906-01 -
NI
20 MHz Bandwidth, 50 MHz to 2.2 GHz USRP Software Defined Radio Device - The USRP‑2920 is a tunable RF transceiver with a high-speed analog‑to‑digital converter and digital‑to‑analog converter for streaming baseband I and Q signals to a host PC over 1 Gigabit Ethernet. You can also use the USRP‑2920 for the following applications: white space; broadcast FM; public safety; land-mobile, low-power unlicensed devices on industrial, scientific, and medical (ISM) bands; sensor networks; cell phone; amateur radio; or GPS.
