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TenTec RX340 vs. AOR AR7030, Racal RA1772 and Icom IC

R75:

(This is a translated and slightly reworked version of an article originally published by DX-Listeners’

Club, Norway in DX-News in April 2004. Author: Jan Alvestad)

Comparison test

The purpose of

this comparison is to

attempt to find out which of these fine

receivers is the most capable at locations

with nearby strong or very strong

transmitters. With my main DX interest

geared toward the reception of weak trans

Atlantic stations on the mediumwave

band, the main focus will be on how well

the receivers perform in this band. The

1200 kW NRK Kvitsøy transmitter on

1314 kHz, just 30 kilometers to the north

northwest of my location, is a real

challenge for the frontend of any receiver. During the test I

’ve used various antennas ranging from a

high signal level beverage pointed to the southwest to a small Pennant. While the Pennant usually has

1314 kHz at the S9+50dB level, the beverage normally pulls in Kvitsøy with S9+75dB. At and near

local sunset even

stronger signals have been noted with the most extreme level at S9+95dB.

RX340 vs. AR7030

Before I got the TenTec RX340 on

loan, my only receiver was an AOR

AR7030.

The RX340 is deceptively

simple to use.

Mastering the basic

functions is easy, however, i

t will take

days and weeks to discover how to best

utilize this receiver in a particular

listening session. My first impression

was that this was a superb receiver well

suited for mediumwave DXing. The

RX340 is excellent for Sync AM

scanning and detects fa

int carriers both

visually and audible, even in the

presence of strong nearby signals. Its

passband tuning capabilities is another of the strong points. With time I came to discover that this

receiver has several shortcomings, some of them serious.

It is a shame that the excellent Sync AM

detection capability is let down by the inability to keep the sync on those weak signals.

SSB DXing is

unpleasant when using filter widths narrower than 4.0 kHz, mainly because of the much poorer than

expected audio but al

so because the digital filters do not exhibit impressive ultimate selectivity. The

main shortcoming is, surprisingly, the inability of the frontend to handle very strong signals.

In the table below I’ve compared some of the important DX related features o

f the RX340 and the

AR7030. I’ve used a scale ranging between 1 and 10 where 1 is useless or very poor while 10 is

excellent.

1 2 3 4 5

Sommario

Pagina 1 - Comparison test

TenTec RX340 vs. AOR AR7030, Racal RA1772 and Icom IC-R75: (This is a translated and slightly reworked version of an article originally published by D

Pagina 2

RX340 AR7030 Comment Sensitivity 8+ Good / very good 8 Good / very good No real differences noted when hearing audio from very weak stations, RX340

Pagina 3 - Racal RA1772

using the remote, only OK when using the controls on the receiver. receiver and is very easy to use. Unfortunately there are some minor nags, such as

Pagina 4 - Icom R75

was noted with an S9 signal on RX340. This was S2 on the RA1772 and could not be heard at all when the internal preselector was engaged. Audio qualit

Pagina 5

2.4 kHz filters. The 15 kHz filter in the 450 kHz IF (the AM/FM part of the third IF) has been replaced by a 4.2 kHz filter. In SSB selectivity is ver

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