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ccpalmer
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Last seen: 2 years 1 month ago
Joined: Aug 22 2020 - 4:44pm
Onix Melody issue

Hello -

I own an Onix Melody Vacuum Tube pre-amp/amp and went to adjust the bias. Three of the adjustments went fine but the fourth reading was way off. I am supposed to have 1.5 volts and that reading was 15-16 volts.

Disclaimer - I know a lot about electronics but not tube amps specifically.

I tried switching the pre-amp, amplifier and phase inverter tubes between channels but no change in bias readings.

Any one with some advice on what could be the problem? The unit works well at low volumes but at higher volumes I get distortion in the upper frequencies.

Thanks!

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