Radio Shack Dx-390 Owners Manual Direct
This post provides a quick guide and resource link for the Radio Shack DX-390 (Sangean ATS-806) Owner's Manual. The Collector’s Guide: Radio Shack DX-390 (Realistic)
If you’ve recently picked up the Radio Shack DX-390—also known by its twin, the Sangean ATS-806—you have one of the most respected portable shortwave receivers of the early '90s.
Whether you’re hunting for a digital copy or just need the essential "cheat sheet" to get started, here is everything you need to know. Quick Start & Key Functions
The Power Source: Requires 6 "C" cell batteries for main operation and 2 "AA" batteries for the clock/memory backup. Always use fresh AA batteries to avoid losing your saved presets. radio shack dx-390 owners manual
Direct Frequency Entry: To tune quickly, press the [FREQ] button, enter the frequency (e.g., 6.075 for Deutsche Welle), and press [ENTER].
SSB (Single Sideband): Essential for listening to amateur radio (hams). Use the BFO (Beat Frequency Oscillator) thumbwheel on the side to clarify the audio once you are on the correct frequency.
Memory Banks: The DX-390 allows you to store up to 18 stations (9 on AM/LW/SW and 9 on FM). Essential Manual Links This post provides a quick guide and resource
Because Radio Shack stores are a thing of the past, digital archives are the best place to find the full technical schematics and user instructions:
The Free User Manual (PDF): A complete scan of the original booklet including the "Guide to Shortwave Listening."
The Service Manual: For those looking to perform alignments or repairs on the internal circuitry. Pro Tip for New Owners eBay / Amazon Used Books – Search “RadioShack
The DX-390 is famous for its Dual Conversion circuitry, which helps eliminate "images" or ghost stations. If you find the shortwave bands are quiet, ensure the RF GAIN slider on the left side is pushed all the way up! Are you planning on using the internal whip antenna, or
3. Need a Print Copy?
- eBay / Amazon Used Books – Search “RadioShack DX-390 manual” (often $5–10).
- RadioShack (if still local) – Very unlikely, but some franchise stores have old inventory.
Section 2: Basic Shortwave Operation (Page 10-14)
This is the goldmine. The manual explains the six shortwave bands (SW1 to SW6).
- SW1: 2.3 – 5.7 MHz (Tropical bands)
- SW6: 21.5 – 26.1 MHz (Low activity usually)
- Pro tip from the manual: Always use the RF gain control (knob on the side) before touching the volume. Overloading the front end causes distortion.
Clearing a Preset
- Store a new frequency over it, or
- Press MEMORY → select page/ch → press SCAN (clears that preset).
Common Issues & Fixes
| Symptom | Likely cause | Solution | |---------|--------------|----------| | No power | Dead batteries / wrong adapter polarity | Check battery contacts, clean with pencil eraser. Use center-negative adapter. | | Weak or no FM | Whip antenna broken | Replace with 75cm whip (Sangean part). Or clip wire to stub. | | Display digits missing | Bad zebra strip connection | Open case, clean LCD contacts with isopropyl alcohol. | | Tuning knob feels loose | Coupler cracked (plastic) | Replace coupler or 3D print one (DX-390 uses 6mm D-shaft). | | High noise on AM/SW | Internal battery corrosion | Clean board with vinegar, then IPA. Check capacitors near audio amp. | | Memory resets often | Backup capacitor (C203) failed | Replace 0.1F 5.5V supercapacitor (Panasonic EECS0HD104H). |
7. Maintenance & Troubleshooting
How to Use the Manual to Troubleshoot Common DX-390 Issues
Even with the manual, these radios are 30+ years old. Here is how the manual helps you fix three common problems.
Legitimate Sources for the PDF:
- ManualsLib (manuals.plus): Offers a clean, searchable PDF of the original manual. Free to view online or download with a free account.
- RadioMuseum.org: Requires a free registration, but provides high-resolution scans of the original schematic.
- Archive.org (The Wayback Machine): User "shortwave_dreamer" uploaded a pristine copy of the 20-201 manual in 2018. Search for "DX-390 owners manual archive."
- Sangean USA Support: Since the DX-390 is a clone of the Sangean ATS-818CS, downloading the ATS-818 manual gives you 99% of what you need. Sangean still hosts these PDFs for legacy products.
Warning: Avoid "instant download" websites that ask for your credit card for a "membership fee." The DX-390 manual is an orphaned copyrighted work; the amateur radio community distributes it freely.