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Antenna Tuners
ACOM 04AT Remote Antenna Tuners
ACOM 04AT Remote Antenna Tuners are designed to work exclusively with the ACOM solid-state amplifier models 600S, 700S, 1200S and 2020S. They can manually, semi-automatically or automatically* select one of four available antenna outputs (assignable) and adjusts the impedance of the chosen antenna output by matching it below 1.5:1, (typically below 1.3), providing optimum load impedance. *Fully automated operation requires a CAT, COM or CI-V frequency (not band data) reading interface cable between the transceiver and amplifier. Features: * Designed for installation in a shack or outdoors * Powered and controlled directly from an ACOM solid state HF+6m amplifier through the amplifier RF output coax * Provides automatic or manual antenna change and matching to ACOM solid state HF + 6m amplifiers. Controlled from the amplifier front panel and optional transceiver CAT, COM or CI-V interface cable. * Guards the amplifier against excessive impedance mismatch during the tuning process. * Operates with two types of tuning: full tuning (basic matching cycle) and fast tuning (from nonvolatile memory * Full tuning is automated , only when the cycle is initiated ly by the operator, to prevent retuning during operations. *BYPASS mode is also available * Antennas appear with a number, type, and user-editable name on the ACOM solid state amplifier's screen * Tuning availability is presented on the amplifier's screen * Protections: PS voltage, Reverse PS polarity, Excessive RF voltage, RF current or reflected power at the antenna outputs, Excessive tuning power, Excessive Input power, Hot switching of relays, Overheating etc. * Protected against static electricity in the antennas via bleeding resistors and close lightning strikes via gas-filled discharge; unused antennas are directly grounded Specifications: * Frequency coverage: 1.8 to 30 MHz and 50 to 54 MHz * Guaranteed impedance matching capability: 16 to150 Ohms; SWR of 3:1 Maximum RF Input power by SWR; average or continuous without mode limitation; in parenthesis (PEP): * At SWR below 2:1; 1,500W (1,500W PEP) * At SWR between 2 and 3:1; 1,200W (1,500W PEP) * At SWR between 3 and 5:1; (provided matching is possible): 700W (1,000W PEP) * At SWR between 5 and 10:1; (provided matching is possible): 350W (500W PEP) RF Input characteristics: * Nominal impedance: 50-Ohm unbalanced; * Connector type: UHF/PTFE (SO-239A); * Input SWR during full tuning (basic matching cycle): below 1.8:1 * Input SWR soon after full tuning: less than 1.5 (below 1.3:1 typ.) Antenna output characteristics: * Nominal impedance: 50-Ohm unbalanced * Connector type: UHF/PTFE (S0239A) * Number of outputs: 4 Full tuning (basic matching cycle): * Below 10 MHz: less than 5s (2-3s typ.) * Above 10 MHz: less than 3s (1-2s typ.) * RF Input power required during full tuning: 25W plus/minus 3 dB (12.5 to 50 watt), continuous mode * Fast tuning duration: less than 50ms (from nonvolatile memory). Coaxial cable maximum length (same for RF power, DC power supply, and control): - 61 m (200 ft.) for cable type RG-58; 305 m (1000 ft.) for cable type RG-213 - Size and mass 20.1 x 15.8 x H 11.8 in.; 15.43 lbs. NOTICE: As of early 2023, the factory installed firmware in the ACOM 2020S supports operation of ACOM 04AT or 06AT Automatic Antenna Tuners. Foe earlier production of the 2020S, all firmware updates are the responsibility of the owner, not DX Engineering or ACOM. Refer to the latest 2020S User Manual at acom-bg.com. Contact ACOM by e-mail for additional information: acom@acom-bg.com Get the most from your antenna and amplifier. Order the ACOM 04AT Remote Antenna Tuner from DX Engineering.
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$1,499.99
Palstar AT4K 2500 Watt Antenna Tuners
One of the all-time great antenna tuners, the Palstar AT4K 2500 Watt Antenna Tuners helped build the Palstar reputation for high-quality and "Built-Like-A-Tank" durability. Unwilling to rest on their laurels over the years, Palstar has added new features to the classic. The most recent addition to the AT4K is the Active Peak and Peak Hold Wattmeter, identical to that used in their PM2000A Wattmeter. The frequency-compensated, lighted, dual-movement SWR/wattmeter may be switched between 300 watt and 3,000 watt scales for peak or average power readings. Now, the selection between unbalanced or balanced output is relay switched with a front panel control on the AT4K, eliminating the need to place a jumper strap on the back panel to make the changeover. Two coaxial and one bypass unbalanced output are handled by the extra heavy-duty ceramic 6-position 7 kV 10 Ampere RF switch assembly. The AT4K surpasses antiquated unbalanced tuners that were built with a 4:1 balun at the OUTPUT of the matching network. In those tuners, the balun was exposed to a wide range of impedance and reactance that it was never designed to handle. The AT4K T-matching network utilizes a 1:1 unbalanced-to-balanced transformer in the INPUT of the network. When the network is properly tuned, an impedance of 50 ohms is presented to the input and output of the balun, which allows it to properly perform its important transformation job. Palstar AT4K 2500 Watt Antenna Tuner features: --Power rating of 2,500 watts single tone continuous --T match circuit with impedance matching range 8 ohms to 2,000 ohms --Custom large value variable capacitors, 460pF at 6 kV --10 Ampere silver plated ceramic body roller inductor crank, handle-driven --11 ga. (.090 in. thick), iridite-treated aluminum chassis, with durable powder coating on front panel and top cover Note: For additional information, please look at the files under the "Documentation" tab. Palstar AT4K 2500 Watt Antenna Tuners are some of the best manually operated impedance matching networks available! Order your "Built-Like-A-Tank" Palstar AT4K tuner today from DX Engineering!
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$1,395.99
Palstar AT5K-HP 3500 Watt Antenna Tuners
Palstar AT5K-HP 3500 Watt Antenna Tuners are special high-power tuners, made in the American ham radio tradition. AT5K-HP tuners are identical in almost every function to the AT5K tuners, which have been nicknamed the "Rock Crusher" and are fast becoming the tuner of choice among amateurs who demand the best and most robust antenna tuner on the market. Some hams already have a great meter, such as the Palstar PM2000A, and do not require a balun to be built into their high power tuner. So, Palstar AT5K-HP tuners are their solution, because they are specially built without an internal balun and they do not have a metering system. Palstar AT5K-HP 3500 Watt Antenna Tuners still offer all of the power handling you need, coming in with an impressive rating of 3,500 watts single tone continuous with low losses, and 5,000 watts PEP performance at certain impedance ranges. AT5K tuners offer a wide impedance tuning range from 1.8 through 22 MHz and a slightly limited impedance tuning range from 22 to 29.5 MHz. Inside the AT5K-HP, you will find massive custom large-plate (600 pF) variable capacitors rated at 6 kV. This high capacitance means unsurpassed performance on 160 meters, while specially designed non-metallic end plates allow for a minimum capacitance of only 23 pF for 10 meter tuning, which is unusually low for a variable capacitor this large. Equally massive is the 35 uH, 10 Ampere, 7 kV, ceramic-body inductor, which is wound with 10 ga. plated copper wire with a silver-plated wheel shaft and contact wheel. Two coaxial and one bypass unbalanced outputs are handled by the extra heavy-duty ceramic wafer 6-position 7 kV, 10 Ampere RF switch assembly. Palstar AT5K-HP 3500 Watt Antenna Tuners feature: -- Power rating of 3,500 watts single tone continuous -- Classic full-performance T- match circuit with impedance matching range 8 ohms to 2,000 ohms -- Custom large value variable capacitors, 600pF at 6 kV -- 10 Ampere silver plated ceramic body roller inductor crank, handle-driven -- 11 ga. (.090 in. thick), iridite-treated aluminum chassis, with durable powder coating on front panel and top cover -- Power connector and cable included, 12 Vdc to power the LEDs Note: For additional information, please look at the files under the "Documentation" tab. With NO METER and NO BALUN built in, Palstar AT5K-HP 3500 Watt Antenna Tuners represent the ultimate, pure performance of the classic, manually operated impedance matching networks of years ago! Order your special "Rock Crusher" today - the Palstar AT5K-HP tuner from DX Engineering!
Not Yet Reviewed
$1,395.99
HA8DU DU1500T Antenna Tuners
HA8DU DU1500T Antenna Tuners are well-known in Europe for their quality parts and perfect performance. World-class construction and high power handling, these are the tuners everyone will be talking about for years to come! HA8DU Tuners include switching for tuned or direct connection to multiple antenna ports, a bypass connector for an external dummy load, cross-needle power, and SWR meters and heavy-gauge coated steel enclosures for an extra-sturdy chassis. Click "More Details" below for additional information, and click "Documentation" tab for the manual. DX Engineering offers HA8DU Tuners, built for pure performance and a lifetime of service.
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$1,059.99
Palstar BT1500A 1500 Watt Double L Balanced Antenna Tuners
Palstar BT1500A 1500 Watt Double L Balanced Antenna Tuners are the only 1,500 watt, double-L network antenna tuners on the market today. BT1500A tuners feature two tandem mounted, precision ceramic roller inductors for a truly balanced tuner. A dual section capacitor provides the correct amount of capacitance for both low-band and high-band operation and is relay-switchable between the input and output side to provide the maximum possible range of impedance matching. So, why buy a balanced tuner? Joel Hallas described the problem many antenna tuners experience in his September 2004 QST article on balanced tuners. He wrote, "Unfortunately, the typical random sized center-fed antenna with random length ladder line feed has an impedance at the feed point that varies dramatically with frequency. The result can be heating and loss (and occasional damage) at the balun ... the classic solution has been the use of an inherently balanced tuner." In his QST article, Joel Hallas was reviewing Palstar's former model AT1500BAL as a high-power solution for amateur operators looking for a balanced tuner. Since that review, the engineers at Palstar have reengineered their AT1500BAL tuner inside and out and reintroduced it as their BT1500A. Palstar BT1500A 1500 Watt Double L Balanced Antenna Tuners feature two precision ceramic-body roller inductors mounted in tandem. The massive dual-section capacitor can be switched, with a front panel controlled relay, from the input side to the output side of the tuning network to provide maximum flexibility in tuning range. Another front panel controlled relay switches the two sections of the capacitor for high and low-band coverage. Plus, as a final touch to the BT1500A, Palstar's engineers added the peak and peak hold dual cross-needle metering found in our popular PM2000A wattmeter. Here are the specifications on these great double balanced antenna tuners; model BT1500A: -- Power rating: 1500 watts PEP -- Relay switched Hi/Low-Z impedance range -- Relay switched Hi/Low-C variable capacitor -- Total inductance of 44uH for greater impedance range on 160m -- Matching range: 160m - 20m (2500+/-j2500), 10m - 15m (1000+/-j1000) -- Two tandem-mounted ceramic body roller inductors - silver plated wheel and wheel shaft -- One turns counter and one crank handle drive both inductors -- Low minimum capacitance, dual-section variable capacitor (960pF/65pF @ 4.5kV) with Vernier drive for smooth accurate tuning -- Ferrite 1:1 input balun, required on double balanced tuners -- Peak and peak hold dual cross-needle metering (1-2 sec hold) with backlighting -- Cabinet metalwork is heavy 11 gauge (0.090 in. thick) Iridite®-coated aluminum; powder coated front panel and top cover Note: For additional information, please look at the files under the "Documentation" tab. Please remember that Palstar BT1500A 1500 Watt Double L Balanced Antenna Tuners are highly-specialized tuners, designed to do only one thing--tune balanced-line feed antennas--and do it well. Order yours from DX Engineering!
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$1,095.99