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Masthead A/B Combiner With Switchable Power-Pass on Both Legs
Product Code: BLACOM21AB
- Combines Group A & B signals
- Triple filtered to block 4G, 5G, and TETRA
- Weatherproof build
- Switchable power pass
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Product Description
Masthead A/B Combiner With Switchable Power-Pass on Both Legs
The BLACOM21AB is a high-performance A/B masthead combiner designed to merge TV signals from Group A (470–606MHz) and Group B (616–694MHz) transmitters. Triple filtered to minimise interference from TETRA, 4G, and 5G signals, it helps maintain clear and reliable reception.
This unit is ideal for use in areas where both Group A and Group B transmitters are needed. By combining signals from two aerials into one, it removes the need for multiple systems and allows access to a broader range of channels. It supports masthead amplifiers with a switchable power pass on both legs and offers low signal loss of just 2dB within each group.
Built for outdoor use, the housing features a weatherproof design with foam-sealed cable glands, a 90° wide-opening door, and an earth tag. F-type connectors ensure stable signal transmission, and the included mounting options support both mast and wall installation.
The BLACOM21AB is suited to installations in areas with overlapping transmitter coverage. It allows for a simplified setup using two aerials to receive a full range of TV channels across both groups. By combining signals into a single feed, it reduces equipment and supports consistent reception in complex broadcast environments.
Technical Specification
Weight
0.25kg
02/03/2026
25/02/2026
Only complaint poor parcel parking of items , surprised had not lost anything in transit
08/02/2026
Great product range, rapid attention to order and fast delivery. What more does one need!
01/02/2026
Great tech support lead to an order which was prepared for dispatch within an hour and was delivered with impressive speed.
31/01/2026
Very easy to order online, good value, excellent communications, fast delivery, and very professional service.
Google Company Reviews
03/06/2026
Friendly staff sorted out my payment problem.
31/05/2026
I bought a 4-way distribution amplifier to replace an old one made by another company. Ordering and delivery went as planned. The amplifier is a solid piece of kit, built to last. Easy to fit. Works well. Nice one !
22/05/2026
Ordered a part that i couldnt find anywhere else, it arrived on time and was exactly what i needed. Cheers blake 👍🏽👍🏽👍🏽
22/05/2026
Can’t fault it. Great service from a family-run business. Will definitely buy again.
20/05/2026
A very good service and very prompt delivery.. excellent customer customer service
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I was pleased with the price and items received however the experience was somewhat marred by DX Couriers. Expecting 2 items in the shipment they only delivered 1 and tracking confirmed 1 of 2 scanned onto delivery vehicle. When I contacted DX they confirmed the second parcel was still in Sheffield at the collection depot. This meant I had to wait in a second day for the rest of the order to arrive.