Author Topic: A really beginner about guitar pickup inductance with a Hantek 6022BE  (Read 2704 times)

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Offline JetfixxxerTopic starter

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Let start off with I'm total newb when it comes to scopes.  I'm a hobbyist I can read schematics, build guitar effects, use my Fluke189 on various things.

I recently started to wind my own pickups and wanted to check the inductance on the pickup.  I was going to go with a CGM-101 http://www.syscompdesign.com/CGM-101_ep_56-1.html from Syscomp.  Then being the person I am I picked up a Hantek 6022BE because cost less and had good reviews.  I was also looking at one of those cheap Chinese function generators on ebay.   The combo of both will still me less than the CGM-101.   Then I read that the Hantek 6022BE FW is driver based.  So now I have reservation about the unit about future updates and improvements.

My question after being long winded.  Will I be able to use the Hantek to check the resonant frequency and plot it?

I always wanted a scope so I could expand myself when it came to troubleshooting pcb's and what not. 

I also going have to set some time aside to view the video's posted here on Oscilloscopes.
« Last Edit: August 28, 2014, 08:38:31 pm by Jetfixxxer »
 

Offline Paul Price

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Re: A really beginner about guitar pickup inductance with a Hantek 6022BE
« Reply #1 on: August 28, 2014, 09:49:55 pm »
You can make a simple variable frequency oscillator with just a LM358, just takes a very few components, connect your pickup across a capacitor, something between .1uF and 1 nF  Apply the output of the VFO to the pickupu/cap circuit though a 10K resistor, using a pot connected as a frequency control on the LM358 sawtooth VFO circuit below, then just connect your scope across the pickup/cap and turn the pot and you will see the resonant frequency as a sharp rise in the mV range on your scope.

You connect a 1K to 10k pot to +Vcc (let us say at the positive of a 9V battery powering this circuit), other side of pot to ground, the center of the pot goes to the +VC* point shown on the schematic below.

The transistor in the circuit can be any general purpose npn transistor such as 2N3904 etc.

The resonant freq is 1/((2*pi* (SqrRoot(*L*C))) or the 1/Period that you see the best peak to peak action at on your scope.

Hope you can do the math.
http://www.allaboutcircuits.com/vol_2/chpt_6/2.html

As far as the Hantek, goes, here is a really bad review of the software that is used with it:http://www.google.dk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCgQtwIwAQ&url=http%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DbEuPtWE8FOI&ei=X6T_U5XDAaShyAOS74HQCw&usg=AFQjCNG0bdw79SXhE1KxNaTC1HhfT45fpQ&bvm=bv.74115972,d.bGQ
« Last Edit: August 28, 2014, 10:18:21 pm by Paul Price »
 

Offline JetfixxxerTopic starter

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Re: A really beginner about guitar pickup inductance with a Hantek 6022BE
« Reply #2 on: August 29, 2014, 01:06:40 am »
Thank you for the schematic.   Now as far as math well that wasn't my strong subject in school.

I watch that video when I was looking around.  I think I will return the Hantek and get the SysComp.   

Thanks
 

Offline beauty2003tt

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Re: A really beginner about guitar pickup inductance with a Hantek 6022BE
« Reply #3 on: March 26, 2015, 03:25:14 am »
 ???
First of all, I'm a really beginner here.
Should I ask where can I post here?
I did not find the button of "Post"...
Really need your help :palm:
 


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