(.090" thick) iridite-treated aluminum metalwork and durable powder coated finish on the front panel and top cover, and you have the AT5K, Palstar's top of the line premium quality antenna tuner. Palstar engineering has incorporated the technology found in our popular PM2000A wattmeter into this tuner to provide dual cross-needle metering with active peak and peak hold.Īdd 11 Ga. plated copper wire with silver-plated wheel shaft and contact wheel. Equally massive is the 35 µH, 10 Amp, 7 kV, Ceramic-body inductor, which is wound with 10 Ga. This high capacitance means unsurpassed performance on 160 Meters, while specially designed non-metallic end plates allow a minimum capacitance of only 23 pF for 10 Meter tuning, unusually low for a variable capacitor this large. Inside the AT5K you'll find massive custom large-plate (600 pF) variable capacitors rated at 6 kV. When the network is properly tuned, a 50 Ohm impedance will be presented both to the input and output of the balun, which allows it to properly perform its important transformation job.įeaturing a 6 position antenna selector switch, the AT5K offers forward power metering in two ranges, 3 watts. Palstar's AT5K, like its AT4K little brother, has a T-matching network utilizing a 1:1 unbalanced-to-balanced transformer at the INPUT of the network. The typical unbalanced tuner with a 4:1 balun at the OUTPUT exposes the balun to a wide variety of impedance and reactance that it was never designed to handle. This tuner has been nick-named the "Rock Crusher" and is fast becoming the tuner of choice among Hams who demand the best and most robust antenna tuner on the market. The American made AT5K is a unique high-power tuner in the American Ham tradition.
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IMHO, you cannot buy a more robust manual tuner than the AT5K, Semper Fi - K6YE" I have run all four amplifiers (Alpha 91B, Kenwood TL-922, Drake L4-B, and Heathkit SB-220) atġ.5KW without any problems. This, I had a Nye-Viking MB-IV but it did not like my Alpha-Delta Sloper on 160 or 80 meters. Note: For additional information, please look at the files under the "Documentation" tab." Awesome 5/5 It is nearly as large as my Alpha 91B and sits on the amplifier rack. * Power requirements: 11 to 16V DC at 750 mA max during tuning * Tunes 6 to 800 ohm loads (16 to 150 ohms on 6m), 6 to 3,600 ohms with optional 4:1 balun * Built-in frequency counter for memory operation
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* Tuning time: 0.5 to 6 seconds full tune, less than 0.1 second memory tune * 2-position antenna switch with memories for four antennas on each position * 4,000 memories (2,000 for each antenna) for instantaneous band changing * Easy-to-read LED bar graph display for RF power, SWR, and status * 5 to 250 watts SSB and CW (100 watts on 6M, 75 watts HF Digital, RTTY, PSK, FT8) The AT-200ProII automatic memory tuners are the latest in a long line of innovative LDG Electronics tuners and will allow you to get the most out of your Kenwood, Yaesu, Ten-Tec, or ICOM radio that operates at higher power. An automatic tuning cycle will begin and then end a few seconds later with the tuners set at the lowest SWR (almost instant for frequencies stored in memory).
Operation couldn't be simpler-while transmitting a carrier, just press the tune button. You can also use the AT-200ProIIs with end-fed antennas, random wires, and antennas fed with ladder line with the optional LDG balun. They will typically match a 10:1 SWR down to 1.5:1 in just a few seconds. The AT-200ProII tuners will match virtually any kind of coax-fed antenna, including Yagis, dipoles, inverted Vs, slopers, loops, or just about anything.
They feature LDG's state-of-the-art, processor-controlled Switched-L tuner. The AT-200ProII tuners will handle up to 250 watts SSB or CW (75 watts RTTY, FT8) on 1.8-30 MHz, and 100 watts on 54 MHz. The AT-200ProII tuners are ideal for this kind of operation their minimum required power is only 5 watts, but they will handle higher power as well. Many QRP operators have a small 100-150 watt amplifier for times when you need a few more S-units. Its purpose is to optimize power transfer by matching the impedance of the radio to the impedance of the end of the feedline connecting the antenna to the transmitter. Even though many of these modern radios feature a built-in tuner, the tuners' range and features are usually quite limited.īreak through those barriers with LDG Electronics AT-200ProII Automatic Antenna Tuners! They're designed for this new generation of rigs and are specifically recommended for Ten-Tec and tube radios. An antenna tuner is an electronic device inserted into the feedline between a radio transmitter and its antenna. Today, more and more transceivers feature 200 watts of output.
There was a time when 100 watts was a lot of power. LDG Electronics AT-200ProII Automatic Antenna Tuners
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