iulian Posted February 27, 2020 Share Posted February 27, 2020 (edited) Salut, Mi-a venit ieri EVH-ul si observ ca are un hum puternic in 50 /100 /200 hz. zgomotul e prezent cand ampul e pornit si nu e in standby Atasez o captura din eq si un sample audio. hum.mp3|Credeti ca ar trebui sa il returnez? sau e ceva normal? LE:am uitat sa precizez ca si cu vol la 0 si gain la 0 zgomutul e prezent. Edited February 27, 2020 by iulian Quote Link to comment Share on other sites More sharing options...
Puiu Posted February 28, 2020 Share Posted February 28, 2020 Este (ne)filtrajul de la alimentare. Trebuie schimbat ampul. Quote Link to comment Share on other sites More sharing options...
iulian Posted February 28, 2020 Author Share Posted February 28, 2020 @Puiu noroc ca e in garantie Quote Link to comment Share on other sites More sharing options...
iulian Posted February 28, 2020 Author Share Posted February 28, 2020 oare https://www.emag.ro/prelungitor-cu-protectie-la-supratensiune-si-filtre-bachmann-connectus-6-prize-schuko-intrerupator-cordon-2m-330-105/pd/EJ8Q2BBBM/?cmpid=86968&gclid=Cj0KCQiAkePyBRCEARIsAMy5Scsv-7hICxC0drgYZPKrlxTJyCVSX6BuOHyN-067u_l6kP-yRPuk1voaAll-EALw_wcB ajuta? Quote Link to comment Share on other sites More sharing options...
vektor Posted February 28, 2020 Share Posted February 28, 2020 Nu prea cred. Ia-ti un servo avr ( stabilizator de tensiune automat cu servomotor ). Nu pot sa garantez ca te scapa de zgomot, dar niciodata nu e rau sa ai asa ceva disponibil. Exemplu: https://www.emag.ro/stabilizator-automat-de-tensiune-cu-servo-motor-500va-well-avr-srv-constant500-wl/pd/DK1JHSBBM/ Quote Link to comment Share on other sites More sharing options...
iulian Posted March 3, 2020 Author Share Posted March 3, 2020 (edited) Am gasit buba. primul tub din preamp(v1) e busit si face si microfonie. am facut swap cu tubul din pozitia v4 si a disparut zgomotul. Am sunat la thoman si au zis ca imi trimit replacement tube http://support.evhgear.com/schematics/EVH_5150_III_15W_Head_Tube_Functions.pdf Edited March 3, 2020 by iulian 1 Quote Link to comment Share on other sites More sharing options...
Puiu Posted March 3, 2020 Share Posted March 3, 2020 Felicitari si succes ! 1 Quote Link to comment Share on other sites More sharing options...
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