Bill Turner wrote:
>>What you must NOT do is allow a situation where an isolated amp
>>chassis can be connected by a single HV+ lead with no ground return or
>>HV-minus. (Welcome to the wonderful world of single-wire Millen
>>connectors.)
>I agree but I would not depend solely on the single ground in the HV
>wiring which may be relatively fragile.
>In my amps I use a separate, heavy ground wire, and since all my amps
>and power supplies (so far) have an AC cord with the third wire ground,
>this also performs the function of grounding the chassis together.
>
>Redundancy may save your life.
>
I completely agree.
The most dangerous situations are often when the amplifier and HV supply
are powered up with temporary connections for fault-finding. In that
case, there may not be as many redundant ground connections as intended.
Coaxial HV cable is the ultimate assurance that if HV+ is connected -
even if it was completely unintentional - there will automatically be a
ground connection too.
Any recommendation for super-insulated single core HV cables and single
pole connectors is totally missing that key point.
--
73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek
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