QRO.cz 4-Way Active PTT Splitter
SKU Part Number: QRO-PTT4BOX
The QRO.cz 4-Way Active PTT Splitter from QRO.cz is a compact, optically isolated keying relay designed to distribute a single PTT (Push-To-Talk)...
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£89.95
Availability: In stock
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The QRO.cz 4-Way Active PTT Splitter from QRO.cz is a compact, optically isolated keying relay designed to distribute a single PTT (Push-To-Talk) signal to up to four independent devices — safely, instantly, and without signal degradation.

Installed between your transceiver’s amplifier keying output and connected accessories, this splitter is the ideal solution for stations that require multiple devices to be triggered simultaneously from one PTT source.

Perfect for contest stations, SO2R environments, amplifier integration, and advanced RF switching systems.


Why You Need It

Modern Amateur Radio stations often require more than one device to follow the transceiver’s PTT line, such as:

  • Linear amplifiers

  • Band decoders or interlock systems

  • Antenna switches

  • Receive protection devices

  • External RF accessories

The QRO.cz 4-Way Active PTT Splitter ensures all connected devices are triggered at the exact same time — with no added delay and complete electrical isolation.

 


Ideal Applications

  • Multi-amplifier stations

  • SO2R setups

  • Contest stations

  • Stations using interlock systems

  • High-power amplifier control

  • Complex receive/transmit switching systems


Built for Reliable Station Integration

The QRO.cz 4-Way Active PTT Splitter is engineered for clean signal distribution and maximum equipment protection. Its optocoupler-isolated outputs and FET switching design ensure your transceiver’s keying circuit remains protected while maintaining instant, synchronised control of all connected devices.

A simple solution to a complex station problem — compact, safe, and built for serious operators.

Key Features

Simultaneous PTT Control for Multiple Devices

Effortlessly splits one PTT signal into four independent outputs, allowing you to control multiple amplifiers or switching systems from a single transceiver keying line.

Optocoupler Isolation for Maximum Protection

Each output is optically isolated to protect your transceiver’s PTT port from:

  • Voltage spikes

  • Ground loops

  • Accessory backfeed

  • Wiring faults

This prevents accidental damage to expensive radio equipment.

Plug-and-Play, Delay-Free Switching

Fully assembled and enclosed in a metal case, the unit provides:

  • Instant activation

  • No timing lag

  • Clean switching for time-critical RF operations

Ideal for high-speed CW, contesting, and digital modes.


Technical Specifications

  • DC Power Supply: 9–15 VDC

  • Typical Current Consumption: 65 mA

  • Outputs: 4x FET switches (50 VDC / 500 mA each)

  • Optocoupler Isolators: Protecting TRX PTT port

  • Input PTT Logic: Active when grounded

  • Input PTT Logic Compatibility: 5V and higher (compatible with OM-Power logic)

  • Input PTT Logic Current: ~40 mA typical

  • Switching Delay: Minimal / Instantaneous

  • PTT LED Indicator: Yes

  • Connectors: RCA

  • PCB Dimensions: 1.97 x 1.98 in (50 x 50.4 mm)


What’s Included

  • (1) QRO-PTT4BOX – Active PTT Splitter in metal enclosure (PCB pre-installed)

  • (1) DC Power Cable

  • (4) Self-Adhesive Foot Pads

Shipping:

We have several shipping options for our products, including next-day and Saturday/Sunday delivery for certain items. Please see these options at checkout.

Returns:

If you have any equipment that needs to be returned to Martin Lynch & Sons, please fill out the form below:

Click here for returns form

Upon receipt of goods you have 14 days to return goods however the goods must be returned in original packaging and care must have been taken with the goods you wish to return. Under distance selling regulations you are not entitled to any refund on carriage charges or modification charges made at your request. Large items cannot be returned if they have been assembled, unless faulty.

Warranty Terms and Conditions

Outside of the 14 faulty return period, returned items cannot be accepted, unless covered by manufacturer's warranty. We will repair as much as possible on site however in exceptional circumstances products may have to be returned to the manufacturer of distributor.

For repairs/replacements under manufacturer’s warranty for any item please download a ML&S return form from the link above and return to ML&S with the faulty product.

International Warranty information

Warranty service for items we sell is available in the U.K. only, unless otherwise noted. It is your responsibility to pay freight for returned items to the U.K. and back to you for desired warranty coverage. All of our NEW products come with a minimum 12 month warranty, (Yaesu & Icom 24 months), with up to 90 days on second-hand equipment. Items returned for service must state "returned goods for repair" on the return air waybill or U.K. import customs duties apply and will be added to your invoice. For more info about returning items please contact our customer help desk, [email protected]