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  #1  
Old 03-22-2012, 07:53 PM
soulritual soulritual is offline
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Hum on urei 1620 Master xlr Output

Hi

Have a hum on Master xlr Output when i turn the pot over 6. Cinch Master Output and booth output are quite.

Someone an idea?

Thanks for any advice.
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  #2  
Old 03-24-2012, 01:43 PM
David Meza David Meza is offline
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The transformer could be bad, or there could be a bad connection there. If the RCA output is clean, then the circuit and the potentiometer are functioning properly.
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  #3  
Old 03-24-2012, 01:51 PM
soulritual soulritual is offline
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Hi David

Thanks for feedback. Hope you are well. Your line in cards works perfect. Only that bad hum.

I will check the connections. It's possible to change the transformer? Would i find the spare parts?

Have a nice weekend.
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  #4  
Old 03-24-2012, 03:53 PM
rs_ rs_ is offline
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I was gonna say the TX too but it's really just wire wrapped around a piece of metal. Not a lot to go bad there. Is it possible that one of the little wires to it has a bad connection? That would be easy to fix, and potentially without replacement.

If you need a new one, Edcor makes 600:600 TXes that are very well-regarded and affordable. I'd think a Cinemag would be closest to the original, and if you really need that "warm authentic vintage sound" leave some magnet wire out on a rainy day then re-wind the TX with it.

rs
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  #5  
Old 03-24-2012, 07:17 PM
David Meza David Meza is offline
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rs is right in checking the connections first. There's just a few spots where the transformer connects at and some surrounding components. With some time, an inspection mirror, and plenty of light you should be able to see if there's something weird going on. Replacing the transformers is drastic, but would be necessary if you have a bad one. I've got a few of the Edcors around too. Just stick to the RCA output if you can and avoid the drama all together (and save time and money too).
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  #6  
Old 03-25-2012, 04:24 AM
soulritual soulritual is offline
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Thanks a lot for the help.

Is there anything to know, if i use the rca output in a club environment?
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  #7  
Old 03-26-2012, 03:21 AM
David Meza David Meza is offline
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Quote:
Originally Posted by soulritual
Thanks a lot for the help.

Is there anything to know, if i use the rca output in a club environment?

RCA connections are usually good for 100ft runs or so. As long as your cable is durable and well shielded, then you should be fine. Neutrik ProFi connectors with some Canare or Mogami cable will be good.
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  #8  
Old 03-26-2012, 08:12 PM
Richi Richi is offline
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Unbalanced will begin to see signal loss after around 10 meters (35 feet) or so, mainly attentuation in the HF range.
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