https://www.eeweb.com/toolbox/coil-inductance
Try this to calculate the inductabce . yes, aa battery 8 turns is right on the money.
Try this to calculate the inductabce . yes, aa battery 8 turns is right on the money.
And use a close coupled wire pair to connect the inductor to the measurement circuit.
Or just rely on the prediction from a recommened calculator.
Hey guys! Just checking in!
After succesfully building the Mains Bulb tester, and after disassembling the amp, I have found the problem for the fuse blowing!
I should add, this mains bulb testing is really great, since I could "see" in which module the problem might be.
The V- fuses blew simply because of the poor speaker connector insertion in the test speakers. They were connecting to each other, thus the shorting problem.
Using the MBT, I have found that my 1000VA toroidal became dead silent. Before, it was making some buzzing noise... Can you help me how to get rid of that I dont want to have the MBT always connected, but want to get rid of that buzz..
I attached a sound clip of the transformer buzz without MBT.
Sound Clip: Transformer Buzz without MBT
Also, I was trying several connections to reduce the noise problem which was happenning with me. Don't know why, but I found out that if I connect the signal ground with the speaker ground, my speakers stop emitting the strange noise which was initially my problem. Good, but can someone tell me why?
I attached a sound clip of the signal gnd connecting to speaker gnd before after comparison
Sound clip: Speaker gnd to signal gnd before/after
Thanks for the help guys!
After succesfully building the Mains Bulb tester, and after disassembling the amp, I have found the problem for the fuse blowing!
I should add, this mains bulb testing is really great, since I could "see" in which module the problem might be.
The V- fuses blew simply because of the poor speaker connector insertion in the test speakers. They were connecting to each other, thus the shorting problem.
Using the MBT, I have found that my 1000VA toroidal became dead silent. Before, it was making some buzzing noise... Can you help me how to get rid of that I dont want to have the MBT always connected, but want to get rid of that buzz..
I attached a sound clip of the transformer buzz without MBT.
Sound Clip: Transformer Buzz without MBT
Also, I was trying several connections to reduce the noise problem which was happenning with me. Don't know why, but I found out that if I connect the signal ground with the speaker ground, my speakers stop emitting the strange noise which was initially my problem. Good, but can someone tell me why?
I attached a sound clip of the signal gnd connecting to speaker gnd before after comparison
Sound clip: Speaker gnd to signal gnd before/after
Thanks for the help guys!
Ok. I found the problem. That web site is not calculating the impedance correctly for some reason. Or the formula is not for these types of coils / inductors.
I used 2 other sources and got answers that match my oscilloscope results.
I also manually caculated it using there supplied forumlas.
I current have 1.692uH
So from my findings I still need to make the coil a little shorter. But at least I can do a sanity check with a formula that works.
I hope this help someone else.
I will keep working on this until I get the correct result.
Cheers.
Sent from my SM-G920I using Tapatalk
I used 2 other sources and got answers that match my oscilloscope results.
I also manually caculated it using there supplied forumlas.
I current have 1.692uH
So from my findings I still need to make the coil a little shorter. But at least I can do a sanity check with a formula that works.
I hope this help someone else.
I will keep working on this until I get the correct result.
Cheers.
Sent from my SM-G920I using Tapatalk
