Manuals | Buy One Now | Checkout PALSTAR AT4K 2500 Watt Antenna Tuner Price: $895.00 The AT4K is the tuner that built Palstar's reputation for high-quality and "Built-Like-A-Tank" durability. Unwilling to rest on our laurels, over the years Palstar has added new features to our classic. The most recent additions are the Active Peak and Peak Hold Wattmeter identical to that used in our PM2000A Wattmeter (a $149.00 value), and front panel controlled relay switching between balanced line and coax output, eliminating the need to place a jumper strap on the back panel to make the changeover. The AT4K solves a problem suffered by the typical unbalanced tuner that has a 4:1 balun at the OUTPUT of the matching network. This exposes the balun to a wide range of impedances and reactances that it was never designed to handle. The solution: the AT4K. 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, 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. Reviewed in the Sept 2004 edition of QST. Click here for eHam.net independent product reviews on the Palstar AT4K. Order online: Order by phone:   1-800-773-7931 (USA Toll-Free)                              1-937-773-6255     (International) Order by fax/mail: Click here for order form Specifications Power rating 2500 watts single tone continuous Unbalanced/Balanced output (switch activated on front panel) with high power balun at the input of tuner circuit T match circuit: impedance matching range 8 ohms to 2000 ohms Custom large value variable capacitors (460pf @ 6 KV) 10 Amp silver plated ceramic body roller inductors crank handle driven Switchable antenna outputs with 10 Amp RF switch assembly Ferrite 1:1 input balun Peak and Peak Hold dual cross-needle metering (1-2 sec hold) with backlighting Front panel controlled relay switching between coax and balanced output Powdercoated front panel and top cover 12 VDC Wall transformer supplied (U.S. & Canada only) Dimensions: 15 1/8" wide x 7 5/8" high x 19" deep (including knobs and connectors) Weight: 20 lbs Images (click on text): AT4K Front View | Inside the AT4K | AT4K Rear view Manuals: AT4K Manual [PDF For double-sided booklet printing] AT4K Manual [PDF For single-side printing] Meterboard Adjustment Manual