Introduction

The Elecraft AT1 is a versatile and accurate HF/VHF step attenuator that permits selecting any level of attenuation between 0 and 41 dB in 1 dB steps.

Overview

OVERVIEW

The AT1 features an unusually high upper power limit of 2 watts, making it ideal for many applications where attenuators with a lower power rating cannot be used such as at the output of a QRP transmitter for QRPp experimentation. The AT1 step attenuator is designed to be used as a standalone unit. Optionally, it may be built into existing equipment or an enclosure of your choice.

Note: This product is a kit which may involve building the product by selecting individual components, soldering them to the circuit board, winding toroids, installing LEDs and displays, calibrating circuits to meet specified performance levels.

Specs

SPECS

Range: 0 to 41 dB in 1 dB steps
Power Handling: 2 W (continuous)
Accuracy: Below 50 MHz: ± 0.25+0.01(A) dB 54 to 220 MHz: ± 0.50+0.01(A) dB (Where A is the attenuation in dB.)
Dimensions: 5-3/8” x 2-11/16” (13.7 cm x 6.8 cm)
No power source required

Accessories

ACCESSORIES

Go to Great Products From Other Manufacturers to see Accessories such as covers, cases, etc. for this product.

Reviews

REVIEWS

Customer references at the Elecraft Email Reflector

FAQ

FAQ

Q: Does Elecraft sell a factory built version of the AT1?

A: No but we do have builders for hire. Visit Support for our Builders Resources page for a list of Builders for Hire.

Q: How easy is the AT1 to build?

A: All of our Mini-Modules kits are straightforward, one night projects. The kits are easy to assemble, featuring our "no-wires" construction. They are also a great way to get back into the swing of building and to improve your building skills. All of our Mini-modules have no user installed surface-mount technology, so they are an ideal project for first-time builders.

Manuals

MANUALS

AT1 41 dB Step Attenuator Manuals, Schematics and Programmer's Reference

Title	Manual	Revision	Download Size
PX3 Owner's Manual	PX3 Owners Manual	Rev A9 (4/28/2017)	6.2 Mb
PX3 Programmer's Reference	Elecraft PX3 Programmer's Reference	Rev A6 (2/13/2017)	861 Kb
PX3 FAQs	PX3 FAQs

PX3 High Performance Portable Panadapter Manuals