That's interesting. Does the pitch of the sound follow your signal generator frequency or is it a constant high pitch noise?
Sounds like that's where your HF power is going. Right you won't get arcing at 1V output but something abnormal is happening as you usually only get sound from the OPT at higher output voltages.
The effect of disconnecting the ground wire is a clue.
The precise order of connection of the primary winding is super critical. I would double check all of the connections as per the attached diagram from the spec sheet. There isn't much else to go wrong.
Connecting the primary windings in the wrong order could create inverse coupling through the capacitance between windings and could definitely manifest as sound. It would also happen only at higher frequencies.
Attachments
Last edited:
I don't have anything to go on to check the datasheet, but the wiring looks correct to me.
I wouldn't let the output float. It sure sounds like some undesired coupling. Is there any DC voltage on the output side when the ground is disconnected?
Yes. It could provide another clue. or another thing to eliminate which is some kind of DC coupling. highly unlikely but easy to check
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.