Two HF transmitters,
one antenna, linear.
The LAC-21 is a linear active combiner built to sum up to two HF transmitters (1–50 mW per port) into a common antenna across 100–800 MHz. Selectable gain (0 / +3 dB / user position), low intermodulation, locking push-pull power connector, recyclable aluminum housing. Made in France.
Bandwidth
100 – 800 MHz
Configuration
2 TX in · 1 antenne out
Gain
0 / +3 dB / user
Input power
1 – 50 mW par port
Architecture
Amplificateurs linéaires
Highlights
Very wide bandwidth
From 100 to 800 MHz: VHF IEMs, professional HF links, émetteurs de caméra, régie inter-com. Un seul combiner TX pour les configurations les plus variées.
100 – 800 MHz · VHF + UHF
Linear amplifiers
Linear architecture to minimise intermodulation at the output: you sum two TX without generating spurs at neighbouring frequencies.
Linear · low IMD
Selectable gain
Three-position switch: 0 dB (filtered pass-through), +3 dB (loss compensation), and a user position set by a solder jumper on the PCB for specific needs.
0 / +3 / user · jumper PCB
Boost a single TX
One transmitter at the input + user position set: the LAC-21 becomes an amplification stage, useful to lift a struggling link without changing the primary transmitter.
1 TX in · up to 100 mW
Push-pull power connector
Locking power connector: no accidental disconnect in the control room or on stage, no mid-recording surprise.
Locking · field-grade
Recyclable aluminum
Machined/extruded aluminum housing: strength, thermal dissipation, longevity — with a material footprint consistent with the rest of the BSRF range.
Aluminum · Made in France
Specifications
The numbers that matter.
Condensed excerpt. See the datasheet for detailed conditions.
RF
Configuration & functions
Power & mechanical
Use cases
HF stage emission
Sum two HF transmitters into a single antenna
Two HF boosters talent + control, one directional antenna in the grid. The LAC-21's linear architecture avoids generating troublesome spurs on neighbouring channels.
VHF / UHF IEMs
Centralize two ear-monitor lines
Two IEM transmitters on neighbouring bands, cleanly combined, broadcast through a single helix antenna. Gain adjusted to match antenna cable loss.
Single-channel booster
Lift a struggling HF link
User position set to +6 dB (PCB jumper), one input used: the LAC-21 acts as an intermediate amplification stage between the TX and the antenna.
Documentation
Everything you need before buying.
Datasheets and user manuals available in PDF format.
Ready to sum your transmitters?
Available by quote, 2–3 weeks delivery.