When there is no could voltage, you should read 0 ohms between the common and the NC contacts.
When you have coil voltage, the relay should connect the common contacts to the NO contacts.
When you have coil voltage, the relay should connect the common contacts to the NO contacts.
Not sure if your saying the relay is bad or I’m reading it wrong. The readings I gave earlier are still present with this relay.
The attached relay is what you have.
The relay will have the common contacts read 0 ohms to the top contacts with no coil voltage.
When you have 24v across the coil, the common contacts should be pulled down and read 0 ohms to the bottom contacts.
If you relay isn't doing this, it may be defective.
The relay will have the common contacts read 0 ohms to the top contacts with no coil voltage.
When you have 24v across the coil, the common contacts should be pulled down and read 0 ohms to the bottom contacts.
If you relay isn't doing this, it may be defective.
Attachments
You stated that the signal after the relay was different. Did you mean that the signal on the two connected pins were not identical?
The output pins on the TL074 showed a normal sine wave. Once the signal reached the relay it shifted to negative voltage like it’s being pulled to ground.
You have to be more complete with the information.
So, the output of the TL074 remains clean?
Th signal both into and out of the relays becomes distorted when the relay engages, correct?
So, the output of the TL074 remains clean?
Th signal both into and out of the relays becomes distorted when the relay engages, correct?
"Yes it’s distorted once it leaves the relay."
Is it distorted on BOTH the input and output terminals of the relay?
Do you have two channels into the relay?
Is it distorted on BOTH the input and output terminals of the relay?
Do you have two channels into the relay?
Perry,
thanks for your help I got the amp working after looking at the board through a magnifying glass and bright light.
thanks for your help I got the amp working after looking at the board through a magnifying glass and bright light.