I first came across this item in November 2023. The first unit was purchased directly from China. I've been very satisfied with the 4-way distributor as it effectively sends the signals from a single antenna to four receivers. Lately the price has dropped and the item is available from Amazon for about $20 USD. I just added the second unit, which splits my second MLA-30+ Antenna. I now use one on each of the MLA-30+ loop antennas.

Here is the manufacturer's description:

**Active RF isolation distributor, suitable for output distribution and isolation of RF signals, radio antennas, SDR, clock sources, GPSDO, signal sources and other equipment. The active RF isolation splitter is a module that distributes RF signals into multiple channels. It has a built-in high-temperature lithium battery and can work continuously for more than 3 days without an external power supply.The working frequency range of the active RF isolation splitter is: 100kHz to 150MHz, insertion loss less than 0.8dB, isolation between output and input 80dB, isolation between outputs 60dB, input with isolator, which can effectively suppress common mode interference and power supply ground interference. The 4-channel impedance signals are all 50 ohms, which can be widely used in the output distribution isolation of radio frequency signals, radio antennas, SDRs, clock sources, GPSDO, signal sources and other equipment.**

There are 7 slides in this article:
**Two Units Piggyback 1**, **Two Units Piggyback 2**, **MLA-30+ #1 and Antenna Switch**, **MLA-30+ #2**, **Amazon Seller**, **Best Amazon Price**, and **Block Diagram**.

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RF Isolation Distributor, Added a 2nd Unit