Hi
I have a Rotel rb-985 that very often takes out the fuse on the house main circuit when its turned on. These amps seem to be known for this.
I bought a soft start from ebay, based on NTC 10-D20 thermistors:
Assembled High Power Soft Start Up Board 220V Operation Best for Audio Amplifier | eBay
..and since there was no documentation supplied, I haves some questions.. There are 6 connection points on the curcuit, 4 are for the mains in/out. I understand those..
The last 2 are marked on/off. Will these need a secondary dc supply, or should they just be connected to be "on", and the amp is turned on by its normal on/off switch?
I will just say that I will only fiddle with the mains after the amp has been turned of for a week, and it will also be moved outside before I turn it on again. Wearing my protective outfit..
Regards
I have a Rotel rb-985 that very often takes out the fuse on the house main circuit when its turned on. These amps seem to be known for this.
I bought a soft start from ebay, based on NTC 10-D20 thermistors:
Assembled High Power Soft Start Up Board 220V Operation Best for Audio Amplifier | eBay
..and since there was no documentation supplied, I haves some questions.. There are 6 connection points on the curcuit, 4 are for the mains in/out. I understand those..
The last 2 are marked on/off. Will these need a secondary dc supply, or should they just be connected to be "on", and the amp is turned on by its normal on/off switch?
I will just say that I will only fiddle with the mains after the amp has been turned of for a week, and it will also be moved outside before I turn it on again. Wearing my protective outfit..
Regards
If there is any documentation or a schematic with this kit, it should show it. If it doesn't, I'd request that from the seller.
It's not exactly clear from the e-bay description but it looks as though the board has a built in reactive power supply which is incredibly dangerous as there is no isolation from the mains voltage.
If I am right, and please check VERY CAREFULLY then all you need is a 240V isolated switch to remotely switch the relays. No need for a second power supply.
You MUST - MUST - MUST obtain a circuit diagram for this before you even think about using it.
If I am right, and please check VERY CAREFULLY then all you need is a 240V isolated switch to remotely switch the relays. No need for a second power supply.
You MUST - MUST - MUST obtain a circuit diagram for this before you even think about using it.
insist on a schematic and wiring diagram.
If they cannot supply these, then claim as "unfit for described use" and get your money back.
If they cannot supply these, then claim as "unfit for described use" and get your money back.
I have asked but still not recieved any.
I will follow your advices. Incredibly dangerous does not sound good.
The guy also sell another soft start that I didnt see when I made the order:
Assembled Soft Starter Start Up for Power Amplifier w Thermal Dectector Protect | eBay
There even I can see the transformer. There also is scematics in the add. Seems like this one is "just" to connect to the mains(?).
Regards
I will follow your advices. Incredibly dangerous does not sound good.
The guy also sell another soft start that I didnt see when I made the order:
Assembled Soft Starter Start Up for Power Amplifier w Thermal Dectector Protect | eBay
There even I can see the transformer. There also is scematics in the add. Seems like this one is "just" to connect to the mains(?).
Regards
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