Elecraft K160RX User Manual

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L E C R A F T

K 1 6 0 R X

1 6 0 M E T E R M O D U L E

W I T H R E C E I V E A N T E N N A S W I T C H

Assembly and Operating Instructions

Introduction

The K160RX adds the 160-m band and a receive antenna switch to the Elecraft K2. The antenna switch
functions on all bands, but is especially useful on 160 m where a low-noise receive antenna is often used.
Preamp and attenuator settings used with the receive antenna are saved on each band (see pg. 10).

The K160RX plugs directly into the K2's RF board, and requires no wiring other than a short lead to the
receive antenna jack. Once the module is installed, the 160-meter band will become available using

B A N D +

and

B A N D -

or via direct frequency entry. Also, the R AN T menu entry (receive antenna) will be

activated.

Latching relays are used for both the 160-meter low-pass filter and the receive antenna switch. These
relays consume no power except when actually being switched on or off, so the K160RX module does not
increase the current drain of the K2. Please refer to the schematic diagram at the end of the manual for
circuit details.

Specifications

160 m Frequency Range

1.8 to 2.0 MHz

Power Output

10 watts (nominal), adjustable to below 0.5 W

Receive Antenna Switch

Impedance

50 ohms

Isolation

> 50 dB between RX ant. jack and main antenna jack (J4)

Applicability

All bands (independent selection on each band)

Current Drain

0 mA

Size

2.6 x 0.8" (6.6 x 2 cm)

The VFO will typically tune down to about 1.4 MHz. This extended receive coverage is useful for

receiving stations in the high end of the A.M. radio band, although the band-pass filter will significantly
attenuate signals below 1.8 MHz.