diyAudio (
-   Multi-Way (
-   -   Hatfield Herts UK Inductance meter (

Pbassred 10th January 2006 07:03 PM

Hatfield Herts UK Inductance meter
I don't have one,
We don't have one at work,
The guys in the design house next door don't have one.
My subcontractors don't have one,
I only want it once. (ok maybe twice).

Could anyone measure a coil for me please?

kelticwizard 11th January 2006 12:37 AM

I do not know how exact this coil measurement must be.

Unless you need it amazingly accurate, you can measure a coil yourself using a simple multimeter, analog or digital. Such multimeters are available quite cheaply, going as far down as $10 here-probably not much more there.

You would need the use of a signal generator.

Here is an excellent online signal generator. Audio Tools =>Sweepgen

pinkmouse 11th January 2006 12:46 AM

If you're still coming down to Chatham I'll measure it for you. :)

jackinnj 11th January 2006 02:01 AM

you can do this with one dual-opamp:

The sound card impedance tester
The LMS test set uses a dual opamp to compare the voltage drop across an unknown impedance and an acurately known resistor. It is remarkably simple.

You can test inductors, capacitors, transformers, negative impedances, etc.

A PDF of the QEX article is available at

the code can be downloaded at
just look about 1/3 down the page

Pbassred 11th January 2006 09:33 AM

Al, I get down that way about once a fortnight. If I don't get any joy in the next 2 weeks I'll deffinatly take up your offer. The gig I was going to was cancelled because the guitarist broke his arm. There will be others sometime though.

Thanks to the other guys. I don't really want to get into special projects for this. I'd probably need to borrow a meter to varify the calibration anyway!

One of my suppliers has a huge flying probe PCB test machine. I might call in that favour. ;)

dhaen 11th January 2006 10:47 AM

2 Attachment(s)
I have an old Marconi Instruments RLC bridge TF2700 you could use. I'm located in Leighton Buzzard, Beds.
Send me an email if you are interested.

All times are GMT. The time now is 09:43 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2