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iulian

EVH 5150 15 lbx hum permanent

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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.

2043924309_Screenshot2020-02-27at19_25_52.thumb.png.8904a89866c89248cabf2c16c5864abb.pnghum.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 by iulian

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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/

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Posted (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 by iulian
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