Eton E1 E1 Uživatelský manuál stáhnout pdf (Strana 3)

Tabletop Review

The information below is not guaranteed to be free of errors.

1. Introduction

Feature RX340 NRD545 7030+ RX350 FRG100 R30C R75 E1

Cost $4250 $1800 $1500 $1200 $600 $590 $570 $500

Size* 1247 944 348 788 301 163 320 244

Size in cubic inches. Negative attributes are yellow and deal-breakers are red.

Recently Drake discontinued their venerable R8B and Eton released their E1. The E1, a

high performance portable, replaces the quality control (QC) problem laden and discontinued

Sat800 in the charts below. Tabletops are organized by Cost. Each radio has a niche.

2. SWL

SHORTWAVE LISTENING

SWL involves reception of relatively high powered broadcast signals. SAM mode enhances

reception by inserting a carrier that maintains phase with the incoming carrier. SAM reduces the

distortion caused by selective fading. All the radios below can be used for SWL.

Feature RX340 NRD545 7030+ RX350 FRG100 R30C R75

SAM FAIR FAIR GOOD POOR NONE NONE GOOD GOOD

Audio FAIR POOR GOOD FAIR GOOD GOOD GOOD GOOD

Speaker POOR POOR GOOD POOR POOR POOR POOR GOOD

Memory 100 1000 400 1024 50 100 99 1700

Display FAIR GOOD FAIR GOOD FAIR FAIR GOOD GOOD

The R75 requires modification: the stock SAM and audio are POOR.

The

E1 stands out for SWL due to its Drake designed SAM, pleasant audio, big speaker,

numerous memories, and informative display. The easy-to-use E1 has separate tone controls, a

whip antenna, FM band reception, and can be readily powered using four “D” type batteries.

The $1500

7030+ is excellent for SWL but with prior QC issues. At one third the price the

E1 has a superior display, front-mounted speaker, better ergonomics, and more memories. The

7030+ SAM produces low level

heterodynes due to harmonic mixing at the “SYNC CAR MIXER”.

The

R30C can be battery operated but batteries are hard to replace and last only ~8.1

hours. The E1 can run for ~71.4 hours on alkaline batteries. The R30C has some QC issues.

The

R75 has an overly fast SAM AGC, limited fidelity, and a broken SAM. Kiwa Electronics

can fix these problems for $80 via two modifications: 1) Synchronous Detector Upgrade, and 2)

High-Fidelity Audio Filter Upgrade. The R75 SAM is sideband selectable via the 9-MHz IF 2.4-kHz

filter and its associated “outer” PBT control. The E1 needs no modification for great SWL.

Usage Tabletop Cost

SWL Eton E1 $500

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Eton E1 E1 Uživatelský manuál Strana 3