Re: Remote Power Supply Connection

Trevor Wilson wrote:
> "Ian Thompson-Bell" <ruffrecords@[EMAIL PROTECTED]
> wrote in message 
> news:g13o17$10ph$1@[EMAIL PROTECTED]
>> Trevor Wilson wrote:
>>> "Ian Thompson-Bell" <ruffrecords@[EMAIL PROTECTED]
> wrote in message 
>>> news:g0up1a$1ap1$1@[EMAIL PROTECTED]
>>>> Trevor Wilson wrote:
>>>>> "Ian Thompson-Bell" <ruffrecords@[EMAIL PROTECTED]
> wrote in message 
>>>>> news:g0rmo0$27co$1@[EMAIL PROTECTED]
>>>>>> I agree when the rectifiers are close to the transformer supplying 
>>>>>> them but not when they are separated from it my a couple of metres
of 
>>>>>> cable.
>>>>> **And again, it is not difficult, nor expensive to deal with such 
>>>>> issues. A handful of capacitors will effectively deal with any 
>>>>> problems.
>>>>>
>>>>>
>>>> Definitely not. The point is that the caps normally used to suppress 
>>>> reverse spikes in semiconductor diodes do just that. The have no
effect 
>>>> on the forward current spikes which are significant.
>>> **No.
>>>
>> Denial is not much of an argument.
> 
> **How about: Not necessarily? Better?
> 

Hardly.

>>>  With remote ac
>>>> supplies these current spikes must pass through the cable and they
will 
>>>> cause serioes radiation. Any attempt to stop them happening will
simply 
>>>> stop the rectifiers from rectifying. That is why is is essential to
have 
>>>> the rectifiers close to the transformer.
>>> **No.
>>>
>>
>> Denial is not much of an argument.
> 
> **OK. It is not necessary to have rectifiers close to the transformer. I
set 
> up a test last night, with 2 Metres of cable, connected to a
transformer, 
> thence to a rectifier, thence to an amplifier. An AM radio place VERY
CLOSE 
> to the cable picked up some radiation. Covering the cable with an
earthed 
> sheild completely eliminated the noise.
> 

And what current were you drawing from the rectified output?

Cheers

Ian