Our electro sheet is for use with toroidal trafos. It consists of two grain-oriented-steel layers that effects
The shielding sheet is placed around the toroidal transformer and the overlapping of the sheet is placed perfectly to the cable outbreak of the transformer. The shielding sheet can be fixed with a fixation tape, adhesive tape or rubber.
Commonly used to match highend stereo audio-gear that has different noise levels on left and right channel cause of trafo noise, hum. If the channel next to the toroidal trafo has a worser noise floor than the channel with greater distance to the trafo, this is an indicator for electro magnetic fields around the toroidaltransformer. In this case use the trafo shielding sheet, wrap it around your toroid-trafo to solve the electro magnetic radiation problem completely.
Specs:
Material:
Application:
For more information (google translated - Please read the german description for original):The effect of the electric shielding is not only cause the chemical composition, in particular its own special grain structure. In contrast to conventional steel, which consists of a chaotic arrangement of tiny crystals adhering to each other, the grains of the electro sheets are actually extremely large and also regarding orientation of their crystal axes aligned uniformly.This equal grain orientation that matters, because the magnetisation of the material can be influenced.Cause its structure the material contracts to the de-magnetisation process very less resistance, in alternating 50 times a second, than conventional steels. Mu-metal has similar properties. This grain structure is achieved by a so-called thermo-mechanical treatment in the disturbed by a cold rolling process, the grain structure and a five to seven days a recrystallization heat treatment takes place.
All reviews:
Trafo Shielding Sheet XL Effective to shield out the magnetic field around the transformer.
Effective to shield out the magnetic field around the transformer.
Great product I shielded my old Trace Elliot GP12SMX transformer with it and the hum that was bugging me for ages is now gone.
I shielded my old Trace Elliot GP12SMX transformer with it and the hum that was bugging me for ages is now gone.
Excellent Product Installed around my 90mm diameter Torroid transformer in my electronic crossover. Measured 80% reduction in EMF from both the top and sides. Should do the job. Tried on another amp with more modest results because wires got in the way of slipping it on more that 75%. Probably would work if I had cut a recess to make better fit. Will order another one and give that a try :-)
Installed around my 90mm diameter Torroid transformer in my electronic crossover. Measured 80% reduction in EMF from both the top and sides. Should do the job. Tried on another amp with more modest results because wires got in the way of slipping it on more that 75%. Probably would work if I had cut a recess to make better fit. Will order another one and give that a try :-)
Very good product for shielding stray filed of toroidal transformer The product works really as advertised ! It is very efficient in shielding the stray magnetic field of toroidal transformers. I had a weak hum at the output of a tube headphone amp due to the stray field of the toroid power transformer coupling into the output transformers. Installing the trafo shielding sheet around the toroidal power transformer solved this problem completely.
The product works really as advertised ! It is very efficient in shielding the stray magnetic field of toroidal transformers. I had a weak hum at the output of a tube headphone amp due to the stray field of the toroid power transformer coupling into the output transformers. Installing the trafo shielding sheet around the toroidal power transformer solved this problem completely.
Trafo shielding sheet used in preamps Hi All, I built 12 microphone pre-amps in one 3u rack together with quite big transformer and I found hum on the last channel. This channel is 5cm away from the transformer and I tried to shield it by thick Iron. Hum was still there. My last chance was this trafo shielding sheet before to make separate power supply box. Installation was very easy. Turn it up and Yippee! HUM is gone. I did not believe it much, but now I can only recommend it.
Hi All, I built 12 microphone pre-amps in one 3u rack together with quite big transformer and I found hum on the last channel. This channel is 5cm away from the transformer and I tried to shield it by thick Iron. Hum was still there. My last chance was this trafo shielding sheet before to make separate power supply box. Installation was very easy. Turn it up and Yippee! HUM is gone. I did not believe it much, but now I can only recommend it.
Hum stopper This sheet works very well.
This sheet works very well.
Efectively reduces hum on integrated amp Bought this to reduce transformer hum on a Rega Brio-R integrated amp. This equipement is housed in a half-width case, meaning the low distance between transformer and electronics caused a small but audioble hum on speakers when sitting close to the speakers (which I am when listing to headphones). The trafo shielding sheet was exact size for this amp and greatly reduced the hum - to the point where is no longer noticeble. Installation we very easy; make sure to follow the instruction and get very tight fit around the transformer and overlap the shielding sheet near the cable exit point for maximal effectiveness.
Bought this to reduce transformer hum on a Rega Brio-R integrated amp. This equipement is housed in a half-width case, meaning the low distance between transformer and electronics caused a small but audioble hum on speakers when sitting close to the speakers (which I am when listing to headphones). The trafo shielding sheet was exact size for this amp and greatly reduced the hum - to the point where is no longer noticeble. Installation we very easy; make sure to follow the instruction and get very tight fit around the transformer and overlap the shielding sheet near the cable exit point for maximal effectiveness.
Simple and cheap fix After finishing my second version of Bruce Hernans http://diyaudioprojects.com/Tubes/6DJ8-Tube-Headphone-Amp/ headphone amp I was left with some slight hum when using my ZMF Verités. I bought one of the normal sized sheets, covered it in Kapton tape and bent it to fit around the Edcor XPWR083A. I could actually hear the hum just go away by putting it over. Very much recommended if youre using a smaller open power transformer, even a non-toroidal one. Ill be definitely picking up a second one once I get around to re-working my previous build.
After finishing my second version of Bruce Hernans http://diyaudioprojects.com/Tubes/6DJ8-Tube-Headphone-Amp/ headphone amp I was left with some slight hum when using my ZMF Verités. I bought one of the normal sized sheets, covered it in Kapton tape and bent it to fit around the Edcor XPWR083A. I could actually hear the hum just go away by putting it over. Very much recommended if youre using a smaller open power transformer, even a non-toroidal one. Ill be definitely picking up a second one once I get around to re-working my previous build.
Wirksam oder überflüssig? Nachdem der Aufbau des bekannten Gyraf G9 Preamps problemlos verlief und der Preamp auch grundsätzlich funktionierte, hatte ich im Bereich von -80dbFS mit einem hörbaren Störgeräusch zu kämpfen, das für mich zunächst klang, wie ein Ground-Loop. Nachdem die Erdungs- / 0V-Kabel Kabel nochmals geprüft waren, lagerte ich die Trafos aus dem Gehäuse aus. Das Störgeräusch verminderte sich leicht. Leider verschwand das Störgeräusch erst, wenn die Trafos ca. 50 cm Abstand zum Gehäuse hatten. Erkenntnis: Die Einstreuungen kamen von den beiden Ringkerntrafos und das Blechgehäuse kann diese nicht wirksam abschirmen. Da ich die Trafos zumindest an der Rückseite des Gehäuses anbringen wollte, habe ich auf gut Glück 2 Abschirmbleche ausprobiert. Und was soll ich sagen: Sie tun tatsächlich was sie sollen, nämlich wirksam die Trafo-Streufelder reduzieren. Jetzt hört man nur noch den Rauschteppich der bei voller Verstärkung jenseits der 100 dbFS-Marke liegt. Die Abschirmbleche machen wirklich glücklich!
Nachdem der Aufbau des bekannten Gyraf G9 Preamps problemlos verlief und der Preamp auch grundsätzlich funktionierte, hatte ich im Bereich von -80dbFS mit einem hörbaren Störgeräusch zu kämpfen, das für mich zunächst klang, wie ein Ground-Loop. Nachdem die Erdungs- / 0V-Kabel Kabel nochmals geprüft waren, lagerte ich die Trafos aus dem Gehäuse aus. Das Störgeräusch verminderte sich leicht. Leider verschwand das Störgeräusch erst, wenn die Trafos ca. 50 cm Abstand zum Gehäuse hatten. Erkenntnis: Die Einstreuungen kamen von den beiden Ringkerntrafos und das Blechgehäuse kann diese nicht wirksam abschirmen. Da ich die Trafos zumindest an der Rückseite des Gehäuses anbringen wollte, habe ich auf gut Glück 2 Abschirmbleche ausprobiert. Und was soll ich sagen: Sie tun tatsächlich was sie sollen, nämlich wirksam die Trafo-Streufelder reduzieren. Jetzt hört man nur noch den Rauschteppich der bei voller Verstärkung jenseits der 100 dbFS-Marke liegt. Die Abschirmbleche machen wirklich glücklich!
ringkerntrafo abschirmblech vorher brummte es nun nicht mehr. zweck erfüllt
vorher brummte es nun nicht mehr. zweck erfüllt
Please see our Privacy Policy
