Where Can a Guy Find a Low Tolerance Inductor as a Standard?

[TheRuler8510]

Where Can a Guy Find a Low Tolerance Inductor?

I have good and cheap capacitance standards, like 0.05% tolerance, and resistors at 0.01%, but I can't seem to find an inductor for less than $60.

Any suggestions? The cheapest currently on eBay are $60 and don't even quote a tolerance.

Thanks,

[HighVoltage]

There are some on ebay from time to time, but they usually start at $400

I had the same challenge a few years back and I made my own.
Bought a few temperature stable toroidal cores and wounded them myself with good quality insulated copper wire.
Then I had then certified at a calibration lab.

They turned out to be extremely stable in regards to inductance, even with changing temperatures.
Using a toroidal core is the only way, that I found to get them stable and this way, you can even mount
the inductor in an aluminum housing, without influencing the inductance at all.

[SArepairman]

There are some on ebay from time to time, but they usually start at $400

I had the same challenge a few years back and I made my own.
Bought a few temperature stable toroidal cores and wounded them myself with good quality insulated copper wire.
Then I had then certified at a calibration lab.

They turned out to be extremely stable in regards to inductance, even with changing temperatures.
Using a toroidal core is the only way, that I found to get them stable and this way, you can even mount
the inductor in an aluminum housing, without influencing the inductance at all.

how many ppm TCL (temp co induc) did you get with this home technology

[owiecc]

I can help with a Keysight E4990A if anyone wants to test their inductor.

[HighVoltage]

I can help with a Keysight E4990A if anyone wants to test their inductor.

Hello owiecc,
I would take you up on the offer.
PM sent, Thank you.

[TheRuler8510]

I can help with a Keysight E4990A if anyone wants to test their inductor.

Hello too, owiecc.

I would also like to take you up on your offer. I'll send a message.

Regards,