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RX Protection limiter with CMCC BOX

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

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connector
  • F
  • PL
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Description

This RX Protection limiter with CMCC (common-mode current choke) BOX 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.


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
  • Input to Output coax ground isolation
  • Low insertion loss
    High quality connectors
  • IP56 box - recommended to protect it against rain and snow
  • Feeder size 100x100 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 BOX: ready to use
ASSEMBLED MODULE: ready to use - MODULE VERSION
Connectors: PL SO-239 or F

Manual

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



version with PL SO-239 connectors

rx protection limiter with cmcc box pl so-239 connector qro.cz hamparts.shop



version with F connectors

rx protection limiter with cmcc box f connector qro.cz hamparts.shop



rx protection limiter with cmcc box protection effect qro.cz hamparts.shop



rx protection limiter with cmcc box where to put this device qro.cz hamparts.shop



PL connectors & limiter OFF

measure rx protection limiter with cmcc box by qro.cz hamparts.shop



PL connectors & limiter 13 dBm

measure rx protection limiter with cmcc box by qro.cz hamparts.shop



PL connectors & limiter 17 dBm

measure rx protection limiter with cmcc box by qro.cz hamparts.shop



F connectors & limiter OFF

measure rx protection limiter with cmcc box by qro.cz hamparts.shop



F connectors & limiter 11 dBm

measure rx protection limiter with cmcc box by qro.cz hamparts.shop



F connectors & limiter 15 dBm

measure rx protection limiter with cmcc box by qro.cz hamparts.shop



common-mode isolation

measure rx protection limiter with cmcc box by qro.cz hamparts.shop



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Product Details

Data sheet

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

Specific References

ean13
1000090109149
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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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