That's hilarious. It'd be interesting to play a bit more to understand what changes. Are you putting more strain/stress on the connectors, thereby causing them to connect better or something?
Tom
Tom
Have you submitted your patent application yet? If not the boys at Monster will scoop it out from underneath you.
All kidding aside, if it works, it works.
All kidding aside, if it works, it works.
I did that to a speaker wire once, and an EE friend saw it and said I had created a filter.
I took apart a flat screen TV (scavenger hunt) and saw that the mains power lead was looped once through a ferrite cylinder. I did some internet sleuthing and found out that this was a ground loop breaker scheme for eliminating hum. I took it out and used in my preamplifier.
Does it work? Well there's no hum or ground loops. I've made it a point to grab these out of any flat screen I see in the electronic recycle dumpster. I also saw where Mouser and Digi-Key sell these.
Does it work? Well there's no hum or ground loops. I've made it a point to grab these out of any flat screen I see in the electronic recycle dumpster. I also saw where Mouser and Digi-Key sell these.
Indeed, ferrite chokes are good for eliminating certain interferences.
I've got a couple of them clipped around various devices around the house.
If the knot is actually solving the problem, then the problem is due to quite high frequency RF. However, more likely that the knot is a coincidence.
Is that cable from a turntable?
Is that green alligator clip jumper your phono ground?
If both are yes, it is proximity between then that reduces ground loop hum.
I wrap my to ground tightly around the tt cables up to the binding post.
Jn
Yes, it's a turntable. Yes the green clip is the ground.
I do know there is a lot of stray power interference in here. AM radio is useless, the entire dial is 60/120Hz.
I almost feel like winging common mode toroidal chokes for them or as mentioned, using ferrite. Still, the hum problem is about 95% gone, and it appears to be somewhat inductive. Moving my DAC several feet away further reduced the hum (it has 3 power transformers in it).
I guess it could be RF. An older design would pick up 98.1MHz FM through the turntable cabling. I guess it was a kind of slope detector.
I do know there is a lot of stray power interference in here. AM radio is useless, the entire dial is 60/120Hz.
I almost feel like winging common mode toroidal chokes for them or as mentioned, using ferrite. Still, the hum problem is about 95% gone, and it appears to be somewhat inductive. Moving my DAC several feet away further reduced the hum (it has 3 power transformers in it).
I guess it could be RF. An older design would pick up 98.1MHz FM through the turntable cabling. I guess it was a kind of slope detector.
It's just simple loop pickup.
Make a better ground. Take the new ground wire, wrap it tightly the entire way around the shielded pairs, then connect at the preamplifier with minimal loop between it and the RCA's.
Then your equipment should be far more impervious to pickup.
Jn
When I set up my turntable, everything went without a hitch! 🙂
Attachments
This is not surprising. In that loop current flows in equal number of turns, but in opposite directions. This means, only asymmetric interference signals are affected by its inductance.
Thanks for sharing.
Thanks for sharing.
Haha KodaBMX,
I do this all the time to terminate twisted pairs, and stop the wire from unravelling.
It solves that problem, and it seems it may be useful for more (unlike plaiting of wires, which doesnt seem to help anything much)
I do this all the time to terminate twisted pairs, and stop the wire from unravelling.
It solves that problem, and it seems it may be useful for more (unlike plaiting of wires, which doesnt seem to help anything much)
Accidentally picking up broadcast VHF is not too difficult, although also not too difficult to filter it away. What is difficult to do accidentally is to slope detect it. Something in your system must have been resonating near 98.1MHz - maybe a cable?kodabmx said:
