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rasp sound

Posted: Wed Oct 26, 2016 4:49 pm
by cybix
After connecting:
Guitar Out -> Zoom 802.1u -> BOSS RC-3 -> to the Input of Blackstar HT1-R, it destroys the amp.
The amp only makes rasp Sounds.

I checked the valves - they are all right. I think the input circuit has a damage? Up left corner of the circuit diagram: Any ideas?

Is there a support forum for techs/engineers?
Do you have a repair plan?


Re: rasp sound

Posted: Wed Oct 26, 2016 6:51 pm
by thephantum
What do you mean by checked the valves? We're they tested by a calibrated tube tester? And/or did you swap them out for known and validated good ones?