Author Topic: RRC 1258 Polarity inversion protection  (Read 1992 times)

I4GAD Enrico

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RRC 1258 Polarity inversion protection
« on: 2023-01-26, 08:21:54 »
Hello All,
I have a very simple question: does the RRC 1258 MKII have a protection to prevent damages in case of reverse polarity power ?
If positive, may be a diode or another component act as a fuse and must be replaced after the burnout?
Thanks in advance to any helper.
73 Enrico I4GAD

sm2o

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Re: RRC 1258 Polarity inversion protection
« Reply #1 on: 2023-01-26, 21:44:20 »
Hi
If no other cables are connected the RRC is protected with a littlefuse (automatic reset) but if a radio is connected both to the RRC and to the same Powersupply then things can happen. Most common is that the common mode fiter L2 just behind the DC connecter is burned, It's easy to measure and it can be replaced by jumpers. Sometimes some of the EMI fiter between the jumper socket and the RJ45 connector on the front get burned,  they can also be replaced by a jumper.

73 de mike

I4GAD Enrico

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Re: RRC 1258 Polarity inversion protection
« Reply #2 on: 2023-01-31, 09:18:20 »
Hi Mike,
thanks for the usual prompt answer !!! Of course you are totally right: the device is protected for accidental reverse polarity.
I have cheched the wall power supply used instead of the ordinary supply and I discovered that it was broken :-(
Luckely my RRC 1258 works fine.
Thanks and best regards.
Enrico I4GAD