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Durham Radio Sales and Service Canada :: Amateur Radio :: Tuners-Preselectors :: Palstar AT4K Tuner (special order)

Palstar AT4K Tuner (special order)

PALSTAR AT4K 2500 Watt Antenna Tuner

The word is spreading about Palstar’s unique, high-end amateur radio products. Carrying on in the Palstar tradition for products of the highest quality designed by Hams for Hams. The American made AT4K tuner is no exception. The American made AT4K is an impedance matching network that fills the void for a matching network that can provide unbalanced/balanced output. This is a one-of-a-kind unique dual-function high-power tuner in the American Ham tradition.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. 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.

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 (460pf) variable capacitors at 6 kV * 10 Amp silver plated ceramic body roller inductors crank handle driven
* Switchable antenna inputs 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 (wall transformer supplied) * Powdercoated front panel and top cover * Dimensions: 15" wide x 7" high x 16"deep * Weight: 20 lbs.