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Ringkjernetrafo KEF PSW2010. 100VA
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Ringkjernetrafo fra en KEF psw 2010. Ble demontert etter å reparert forsterkeren flere ganger.
Veit ikke så mye om data men ser ut til å vere 100VA.
Fant et forum hvor de skriver om denne. Går ut i fra at data som er omdiskutert her stemmer. Se under.
Yes, that transformer comes from a KEF subwoofer, primary winding 2 times 110 V, secondary winding is 38.7V unloaded, loaded with 4A it drops to 34.4V.
The primary winding consists of 2 windings, the first winding is brown and blue and is 110V, the second winding is brown and blue, also 110V and has a red thread for an extra 20V.
Secondary winding is yellow black yellow, middle is black, 38V between black and the two yellow wires and thus 2 times 38V between the yellow wires.
For 110 V you can parallel the two primary windings, set brown with brown parallel and set blue with blue parallel and connect the Terafo at 110V between the two blue and brown wires.
Connect the two windings in series for 220V, connect and insulate brown with blue, and connect the remaining brown and blue wires to 220V. Use a fuse for 3.15A for 110 V and half for 3.15 A for 220V.
The thing comes from a Kef PSW2010, .
Be careful, high voltage and current, Hans.
This is standard protocol for 110,220 and 240 V, for 240 volts all windings are in series, brown blue 110 V, second winding brown blue 110 V and the red wire an extra 20 V to bring it to 240 V.
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Sist endret: 10.1.2026 kl. 08:28 ・ FINN-kode: 445248116
