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Sep 23, 2014 at 23:52 comment added ScienceSamovar @GeorgeHerold, why is it a mistake? It works as an antenna when it is in circuit and as a shielding when it is not in circuit. How is having antenna is better than having a shielding?
Sep 23, 2014 at 23:51 comment added George Herold @ScienceSamovar, sorry, the case is part of the circuit. Trying to isolate it is a mistake.
Sep 23, 2014 at 23:40 comment added ScienceSamovar @GeorgeHerold - read the question, I described all there.
Sep 23, 2014 at 23:40 comment added ScienceSamovar @venny - there is no ground on output. Just 2 wires. There is no point in grounding either from input or outlet since commercial attenuators work with any kind of amplifier and without power cable, which is logical because no one wants to hook another wire or rebuild amp's out stage for that minor thing.
Sep 23, 2014 at 23:34 comment added venny @ScienceSamovar Do you have the amplifier's schematic? Sometimes one side of the secondary winding is grounded and sometimes not.
Sep 23, 2014 at 23:32 comment added ScienceSamovar connector is connected to output of transformer of an amplifier, there is no ground in there either. Transformer is floating by definition.
Sep 23, 2014 at 23:25 comment added ScienceSamovar No, it does not plug into a wall, it is passive, just attenuator(resistor in a box if you prefere), it does not need any power supply of any kind. And even if it does, commercial equipment(like FX pedals mentioned in question) do not use any ground connection at all either, so there is no point of talking about grounding it through outlet.
Sep 23, 2014 at 23:17 comment added ScienceSamovar Just to be sure -the answer is not "painting the case", because paint gets ripped off and inside of a drill holes will very likely have a contact with metal anyway. Not to mention that these things may travel a lot and 40% of paint is gone after 4-5 years of heavy usage.
Sep 23, 2014 at 23:14 comment added ScienceSamovar Of course, it's the easy way, but then you have a power cable going to the wall just for the wire, which just looks stupid and adds one more wire. And the case here is - why do I need to make plastic case/ground wire/plastic connectors/etc. when there are tons of equipment that use all metal stuff and feel great? :) Just first links from google: suhr.com/jim-kelley-power-attenuator.html amptone.com/powerattenuatorfaq.htm nutsvolts.com/index.php?/blog/post/the_lost_world_of_tubes It is clear that it is possible to do so, question is how?
Sep 23, 2014 at 23:12 history edited George Herold CC BY-SA 3.0
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Sep 23, 2014 at 22:58 history answered George Herold CC BY-SA 3.0