Extech LCR meter schematics

[salvarsan]

The very reason of my inquiry, thanks. I wouldn't laugh because that very same thing has happened to me a number of times, now I always question internet "data".

Care for a schematic of the Klon Centaur?*


-drh

[Mike Sulzer]

A while ago, we were discussing soundcards to generate the test signal and to receive the I and V signals, and doing the fancy math (like digital tayloe) in software. We would build the electronics to interface the soundcard to the drive amplifier and IV inputs. Mike Sulzer built some interface circuits. The effort seems to have petered out, but the idea still lives.

A lot of people would prefer a handheld or bench instrument with buttons.

The effort did not peter out from my pov. No sound card is necessary when using a mac since adequate hardware is present in the computer. All that is necessary is an I-V circuit and software for the mac. Final schematic and discussion, with reference to earlier discussions, is in post 7 of http://music-electronics-forum.com/t12276/.

This approach to the problem uses simple hardware that you need to make, and puts most of the intelligence in the computer, which you already need for other things.

A stand alone meter for measurement at many frequencies seems impractical. How will you store and plot the data? How will you find the circuit model that matches the measurements?

[RedHouse]

... How will you find the circuit model that matches the measurements?...

Now we need modeling? this is getting out of hand fast.

[Mike Sulzer]

Now we need modeling? this is getting out of hand fast.

You can measure the complex impedance, but at the high frequencies you need to worry about both the inductance and capacitance.

Now I also claim that even at somewhat lower frequencies, a humbucker coil model needs two inductors and two resistors. Not everyone believes that.

[David Schwab]

Care for a schematic of the Klon Centaur?*

You mean this thing?

[salvarsan]

You mean this thing?

It's incorrect.


Since the Klon is Bill Finnegan's only source of income, it would be unkind in the extreme to discuss the details in a public forum.


-drh

[RedHouse]

Go here to discuss that: Freestomp.org

[David Schwab]

It's incorrect.


Since the Klon is Bill Finnegan's only source of income, it would be unkind in the extreme to discuss the details in a public forum.

I don't even know anything about the pedal, and I figured the schematics were wrong, from what I could gather, so I posted one that I figured was wrong.

The only clone I ever made was a copy of the Maestro Bass Brassmaster. Everyone said that schematic was wrong when using GGG circuit boards and R.G. Keen original layout, but I discovered the problem in the original schematic. (pat myself on the back) Oh and some MXR Distortion Pluses back in the day lol

I prefer to try and come up with my own stuff. I Can't believe people have this whole business revolving around the same Tube Screamer mods that Gus Smalley came up with back in the early 90's, and everyone acts like it's their idea.

I agree it's not cool to steal other people's ideas to make money off of.

[RedHouse]

...I agree it's not cool to steal other people's ideas to make money off of...

Like we do here with guitar pickups?

Sorry, couldn't help it but that is what forums are all about, discussion, sharing knowlege, and absolutely everyone from time to time incorporates anothers ideas onto their own work, it is what it is.

IMHO DIYstomp and Freestomp are no different than here.

[David Schwab]

Like we do here with guitar pickups?

I just posted something to that affect at the inductance thread.

I don't make copies of pickups, except for a few humbuckers for my own use, and even then I'm not trying to make them sound like a PAF or whatever, just using existing parts. I make most of the parts in my pickups, and I'm not following other people's designs.

Personally I think it's more fun creating new things, which is why I also don't make Jazz Bass copies, or try to sound like what ever the latest popular trend in music is.

But your average player wants pseudo vintage stuff, or the same thing regurgitated into another form over and over again. I have no interest in that. I've never been into that whole copy cat thing. Some people have no originality.



If I could, I'd smack every guy with a Jazz Bass and SVT in the head with a wiffle bat and tell them to think for themselves!

[RedHouse]

...But your average player wants pseudo vintage stuff, or the same thing regurgitated into another form over and over again. I have no interest in that. I've never been into that whole copy cat thing. Some people have no originality.



If I could, I'd smack every guy with a Jazz Bass and SVT in the head with a wiffle bat and tell them to think for themselves!

That's one of the things I admire about your approach David, you want to move forward and think outside the box.

[salvarsan]

Like we do here with guitar pickups?
Sorry, couldn't help it but that is what forums are all about, discussion, sharing knowlege, and absolutely everyone from time to time incorporates anothers ideas onto their own work, it is what it is.

In the case of Bill Finnegan's Klon,
it is an unusual work that he has protected from facile copying.
It's not as if it was a Tube Screamer variant.

In the case of guitar pickups, they're as old as dirt and little new has been added
since the end of the Second Industrial Revolution, except in trivial matters of taste.
Most of the existing pickup patents are of very dubious provenance, to put it mildly.
In terms of obviousness, it's a waste of time to protect a pickup design,
even the truly innovative ones.

An aggressive class action lawsuit would blow Rickenbacker and/or Dimarzio out of
the water, or at least make shut up about toaster style pickups and Vintage Noiseless
patents.

Guitarists?
Organize to mount and finance a lawsuit?
(smacks forehead with palm)
What was I thinking?!

IMHO DIYstomp and Freestomp are no different than here.

It depends.

When someone has created something obviously different
and has protected that uniqueness from duplication,
then there is cause for concern.

-drh

[David Schwab]

An aggressive class action lawsuit would blow Rickenbacker and/or Dimarzio out of the water, or at least make shut up about toaster style pickups and Vintage Noiseless patents.

Let's not forget horseshoe pickups and double cream bobbins.

[RedHouse]

...When someone has created something obviously different...

Definately a matter of opinion there.

IMHO, Jack Orman actually had some things obviously different, but that's another thread.

[-Elepro-]

will it enough?