HippoPippo
New member
Hi all,
first post here, hope I am doing this correct without missing any important information. Setup is:
Tyrian plugged into my Audio Interface, running AmpHub just with an IR for soundtesting sake.
I have an issue with my Tyrian build, that when I push the volume above a certain threshold, should be around 12 (have no Pot-caps to fully determine this, so roughly guessing) I get a unbearable whistle which does not go away. I also have this whistle kind of permanently when I switch one of the modes on.
When I leave the volume below a certain threshold on the "normal" mode, then I can kind of get away even with gain even very high, but as soon as I turn up the volume.
The whistle shifts as I turn the EQ knobs, especially the treble knob highly influences it.
The whistle is somewhere around the range 1kHz to 3 kHz, I would guess (based on swiping through with an online frequency generator to "find the whistle tone).
I do have an oscilloscope at my disposal, so I could measure stuff (although I would have to work myself into it again, since last time I used one is 10+ years ago), but no signal generator, so the things which I basically checked:
- Clipping LEDs tested with a multimeter, on the LED checker setting they light up when Anode connected to + pin and cathode connected to com pin.
- The ICs show in the right direction as far as I can tell
- Elko Condensers show in the right direction
- All diodes in correct direction from what I can tell
- Wiring should be fine as well
Do you see anything else based on the pictures? Or any recommendations on certain voltages to check etc.?
Let me know if a video is needed.
Thanks a lot in advance for any help!
Cheers
Phil
first post here, hope I am doing this correct without missing any important information. Setup is:
Tyrian plugged into my Audio Interface, running AmpHub just with an IR for soundtesting sake.
I have an issue with my Tyrian build, that when I push the volume above a certain threshold, should be around 12 (have no Pot-caps to fully determine this, so roughly guessing) I get a unbearable whistle which does not go away. I also have this whistle kind of permanently when I switch one of the modes on.
When I leave the volume below a certain threshold on the "normal" mode, then I can kind of get away even with gain even very high, but as soon as I turn up the volume.
The whistle shifts as I turn the EQ knobs, especially the treble knob highly influences it.
The whistle is somewhere around the range 1kHz to 3 kHz, I would guess (based on swiping through with an online frequency generator to "find the whistle tone).
I do have an oscilloscope at my disposal, so I could measure stuff (although I would have to work myself into it again, since last time I used one is 10+ years ago), but no signal generator, so the things which I basically checked:
- Clipping LEDs tested with a multimeter, on the LED checker setting they light up when Anode connected to + pin and cathode connected to com pin.
- The ICs show in the right direction as far as I can tell
- Elko Condensers show in the right direction
- All diodes in correct direction from what I can tell
- Wiring should be fine as well
Do you see anything else based on the pictures? Or any recommendations on certain voltages to check etc.?
Let me know if a video is needed.
Thanks a lot in advance for any help!
Cheers
Phil