1. Ham, Amateur Radio Communication For Sale
  2. sku: 13711201627677793
  3. THRANE 37-100009-02

THRANE A/S 37-100009-02 Copenhagen Battery Backup Board Marine Radio

37-100009-02 Thrane & A/s Copenhagen Vintage And Tt Battery Backup Board Marine Radio 1985

( Brand: Thrane A/s ), ( Manufacturer Part Number: 37-100009-02 ), ( Type: Battery Backup Board ), ( Unit Type: Unit ), ( Country Of Origin: Denmark )

Review THRANE A/S Copenhagen Vintage And Battery Backup Board Marine Radio

The **Thrane & Thrane A/S Copenhagen 37-100009-02 Battery Backup Board** is a meticulously engineered marine radio accessory designed to ensure uninterrupted communication and safety aboard vessels, particularly in critical situations where power reliability is paramount. Manufactured by the renowned Danish company Thrane & Thrane a pioneer in marine electronics since 1922 this component is a testament to the brand s commitment to durability, precision, and maritime innovation. Originally produced in the mid-1980s, the **37-100009-02** is a robust, hardwired backup power solution tailored for Thrane & Thrane s marine VHF radios, including models like the **Copenhagen 37** series, which were staples on commercial and recreational vessels during its era. Its primary function is to provide an auxiliary power source to the radio s internal circuitry, ensuring that essential transmissions such as distress calls, coordination with coast guards, or navigational updates remain operational even during prolonged power failures, blackouts, or generator malfunctions.

Constructed with marine-grade materials, the backup board features a compact yet sturdy design, typically housed in a sealed, corrosion-resistant enclosure to withstand the harsh conditions of saltwater environments, humidity, and temperature fluctuations. The unit integrates seamlessly with the radio s existing power supply, often connecting directly to the radio s battery terminals or an auxiliary power source like a marine battery or alternator. Its internal circuitry includes a sophisticated voltage regulation system, designed to maintain optimal power levels to the radio s components, preventing damage from voltage spikes or drops. This ensures that the radio remains fully operational for extended periods, even if the primary power source fails. The board s wiring and connections are meticulously labeled and color-coded, adhering to Thrane & Thrane s engineering standards, which prioritize ease of installation and maintenance by marine technicians.

One of the standout features of the **37-100009-02** is its reliability in emergency scenarios. In the event of a power outage, the backup board activates automatically, drawing power from a dedicated battery or external source to keep the radio s transmitter, receiver, and internal systems functioning. This is particularly critical for vessels operating in remote or high-risk areas where immediate communication is non-negotiable. The board s design also accounts for the unique electrical demands of marine radios, which often require stable, high-quality power to avoid interference or signal degradation. By mitigating power-related disruptions, the **37-100009-02** enhances the overall safety and operational efficiency of the vessel, aligning with Thrane & Thrane s legacy of creating equipment that mariners can depend on in the most demanding conditions.

For collectors, restorers, or enthusiasts seeking to preserve the functionality of vintage Thrane & Thrane radios, this backup board is a highly sought-after component. Its historical significance lies in its role as a critical backup system during an era when marine electronics were less sophisticated and redundancy was essential for survival at sea. While modern marine radios may incorporate integrated backup solutions, the **37-100009-02** remains a fascinating example of early marine engineering balancing simplicity with effectiveness. When properly installed and maintained, it continues to serve as a reliable safeguard, ensuring that the voice of the sea remains heard, even when the power does not. For those working with classic Thrane & Thrane systems, this component is not merely a spare part but a piece of maritime history, embodying the ingenuity of a time when every detail mattered in the pursuit of safe and effective communication at sea.

**Pros and Cons of buying a Thrane A/S Copenhagen 37-100009-02 Battery Backup Board for a Marine Radio (1985 Model)**

### **Pros**

1. **Compatibility with Older Systems** This backup board is designed specifically for marine radios manufactured in the mid-1980s, including the Copenhagen 37 series. It ensures that the radio remains functional during power failures, which is critical for safety at sea.

2. **Reliability for Critical Applications** Marine radios are essential for communication, navigation, and emergency signaling. A battery backup board prevents loss of signal during blackouts, reducing risks like disorientation or inability to call for help.

3. **Preservation of Radio Functionality** Without a backup power source, sudden power interruptions could damage the radio s internal components or corrupt stored data (if applicable). This board extends the radio s operational lifespan by providing stable power during outages.

4. **Easy Installation** The design appears to be modular, allowing for straightforward integration into existing marine electrical systems. Many marine electronics from this era were built with compatibility in mind, making retrofitting feasible for those with basic electrical knowledge.

5. **Cost-Effective Upgrade** Compared to replacing an entire radio or relying on external power solutions, this backup board offers a targeted and relatively inexpensive way to maintain functionality without overhauling the system.

6. **Historical and Nostalgic Value** For collectors or enthusiasts who appreciate vintage marine electronics, restoring and maintaining a 1985 radio with proper accessories can be rewarding.

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### **Cons**

1. **Age-Related Wear and Tear** The board itself may be old, and its internal components (batteries, capacitors, or wiring) could degrade over time. This requires careful inspection before purchase to ensure it is in working condition.

2. **Compatibility Risks** While designed for the Copenhagen 37 series, slight variations in wiring or voltage requirements between models or aftermarket modifications could cause issues. Testing is necessary to confirm seamless integration.

3. **Limited Availability of Parts** As a product from the 1980s, finding replacement parts or technical support may be difficult. If the board fails, sourcing identical components could be challenging.

4. **Battery Maintenance** The backup board likely relies on batteries (e.g., lead-acid or nickel-cadmium) that require periodic replacement or charging. Neglecting this could render the backup ineffective.

5. **Potential for Obsolete Standards** Marine electronics have evolved in terms of connectivity (e.g., digital interfaces, USB, or modern power standards). The backup board may not integrate well with updated systems if the radio is modified or paired with newer equipment.

6. **No Warranty or Guarantee** Purchasing a used or vintage part typically means forgoing manufacturer warranties. The buyer assumes full responsibility for functionality and longevity.

7. **Skill Dependency** Installing or troubleshooting the board may require electrical knowledge. Improper handling could lead to short circuits, damage to the radio, or voiding any residual functionality.

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### **Conclusion**

The Thrane A/S Copenhagen 37-100009-02 Battery Backup Board is a practical solution for preserving the functionality of a 1985 marine radio during power outages. Its primary advantage lies in ensuring critical communication remains intact, which is invaluable for safety at sea. However, the risks associated with age, compatibility, and maintenance cannot be overlooked. For someone with technical expertise, a willingness to inspect the part thoroughly, and access to spare batteries, this backup board can be a worthwhile investment. Conversely, those seeking a hassle-free or long-term solution might consider upgrading to a modern marine radio with built-in backup power instead.

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### **Recommendation**

- **Proceed with Purchase If:**

- You have a confirmed need for the radio s backup functionality and are prepared to test the board s compatibility.

- You are comfortable with basic electrical work or have access to a marine electronics technician for installation.

- You can source replacement batteries and are willing to maintain the system proactively.

- The radio holds sentimental or historical value, and you prioritize restoration over replacement.

- **Consider Alternatives If:**

- You lack the technical skills or tools to install or troubleshoot the board.

- The radio is frequently used in modern environments where newer, more reliable backup systems (e.g., UPS units for marine radios) are available.

- You are unsure of the board s condition and cannot verify its functionality before purchase.

- Upgrading to a contemporary marine radio with integrated backup power would be more cost-effective in the long run.

For optimal results, pair this purchase with a thorough inspection of the board s components, a test of its functionality with the radio, and a plan for ongoing maintenance. If possible, consult with a marine electronics specialist to confirm compatibility and installation procedures.

Details:

An excellent, hard-to-find replacement part for a vintage Thrane marine communications rack. It was pulled from decommissioned equipment. Up for sale is a vintage OEM Thrane A/S Copenhagen Battery Backup Module Part # TT 37-100009-02. Originally utilized in high-end commercial maritime radio or satellite communications equipment.

Recovered from a commercial electronics cleanup. The board features Motorola logic chips with 1984 / 1985 date codes and an Elect-Tirol reed relay.

part #: 3710000902 price

  • $40.00

specifications hamamateuradio:

  • brand: Thrane A/s
  • mpn: 37-100009-02
  • type: Battery Backup Board
  • unit type: Unit
  • country of origin: Denmark

shipping hamamateuradio:

  • carrier: USPS
  • service: USPS Ground Advantage
  • class: Standard
  • cost: $7.03
  • transit: 5-11 Days
  • type: Calculated

general hamamateuradio:

  • condition: For parts or not working
  • Radio Communication > Ham, Amateur Radio > Ham Radio Transceivers

payments hamamateuradio:

  • credit card: Discover
  • other
  • wallet: Paypal

offer hamamateuradio:

  • started: March 29, 2026
  • sold: 0
  • options: Ship-to-home
  • quantity: 1
  • availability: In Stock
  • best offers: True

seller hamamateuradio:

  • city: Gulf Shores, Alabama
  • rating: 100.0%
  • # reviews: 101

returns hamamateuradio:

  • policy: No Returns
type: battery backup board, unit type: unit, country of origin: denmark,
category: electronics > radio communication > ham, amateur radio > ham radio transceivers, sku: 13711201627677793,
Thrane A/s 37-100009-02 Is Similar To:
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1 offer $40.00 USD
  • For parts or not working. Offer #1 priced at $40.00 + $7.60 shipping estimate = $47.60* total. An excellent, hard-to-find replacement part for a vintage Thrane & Thrane marine communications rack. Recovered from a commercial electronics cleanup.+$7.60 shipping

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