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RX Protection limiter with CMCC module

This protection limiter module is able to protect your receiver against the high power RF signals and prevent from destruction.

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connector
  • SMA
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Description

This RX Protection limiter with CMCC (common-mode current choke) pcb module is able to protect your receiver against the high power RF signals and prevent from destruction. These high RF signals are common in the multi transmitter environment - contest QTH, but also it can limit strong RF peak from the close lightning. Simply, but powerful, high voltage protection limits AC voltage peaks to 65 V. Transformators work as isolation and Common-mode current as filter.

The SuperFuse protects against high current in the RX line and disconnect the circuit. This SuperFuse is big advantage compare to the best products on the market. Thanks to the circuit construction there is minimal problem with IMD. Limiter works for the signals higher than 20 mW. This device do not degrade the dynamic range of the receiver. The signal which is limited by this protection is usually higher than the value which is in the dynamic range of most receivers on the market. You can use this PCB module in your own design.


Using & Where to put this box

  • At the receiver port (RX ANT) of your TRX
  • At the input port of RX preamplifier
  • At the output of your RX preamplifiers - output could be 400mW!
  • At the output of your RX ANT switch

Main functions

  • Diode RF limiter for signals higher than 10 dBm (10 mW)
  • SuperFuse protects circuit against current higher than 100 mA
  • Neon lamps light up with AC voltage higher than 65 
  • Common-mode current insulator
  • High RF isolation
  • Quality SMA connectors
  • PCB size 79x43 mm
  • ASSEMBLED and TESTED VERSION

Parameters

  • Impedance 50 or 75 the same at in/out
  • RF limiter output +13 dBm (could be se to +17 dBm by jumper)
  • SuperFuse break circuit when current is higher than 100 mA
  • Neon lamps protect while > 65 V AC
  • Low insertion loss
  • Galvanic isolation IN to OUT
  • Common-mode isolation > 40 dB @ 160m, > 30 dB @ 40m, > 18 dB @ 10m

Available as

ASSEMBLED MODULE: ready to use
ASSEMBLED BOX: ready to use - BOX VERSION
Connectors: SMA

Manual

If you want to know more please check our wiki with RX Protection limiter manual.



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rx protection limiter with cmcc pcb module protection effect qro.cz hamparts.shop



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limiter OFF

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limiter 13 dBm

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limiter 17 dBm

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Product Details

Data sheet

type
ASSEMBLED
design
pcb module
usage
RX
impedance
both 50 & 75 Ohm
front-end protection
input and output
frequency range
0.1 MHz to 30 MHz

Specific References

ean13
1000090109132
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This device is impedance matching transformer for 75 to 50 or 50 to 75 Ohm. It's designed for your RX antenna system and offer more than impedance matching.

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