Measurements from my Dearmond Rhythm Chief 1100

[belwar]

Well I've taken so much from this forum that I better give something back... So I thought I'd give you guys (and gals) the readings from the Dearmond Rhythm Chief 1100 that I am cloning. If you have any questions or want to know anything about it let me know..

DC Resistance at 68 degrees, pickup and 7" lead only: 15.14K

I'm still learning the following terms, so taking measurements using all the possible settings. I dont know the difference between PAL and SER on the meter so I'll measure and post both.

These reading measured using an Extech 380193 using the "SER" setting.
Inductance @ 120hz: 5.994 H
Q as the secondary Parameter of Inductance @ 120hz: .3035
D as the secondary Parameter of Inductance @ 120hz: 3.294
R as the secondary Parameter of Inductance @ 120hz 15.24K
Capacitance @ 120hz: 281.5 nF
Q as the secondary Parameter of Capacitance @ 120hz: .3018
D as the secondary Parameter of Capacitance @ 120hz: 3.312
R as the secondary Parameter of Capacitance @ 120hz 15.24K
AC Resistance @ 120hz: 15.227K
Inductance @ 1khz: 5.354H
Q as the secondary Parameter of Inductance @ 1khz: 1.440
D as the secondary Parameter of Inductance @ 1khz: .6942
R as the secondary Parameter of Inductance @ 1khz 23.38K
Capacitance @ 1khz: 4.700nf
Q as the secondary Parameter of Capacitance @ 1khz: 1.447
D as the secondary Parameter of Capacitance @ 1khz: .6907
R as the secondary Parameter of Capacitance @ 1khz 23.36
AC Resistance @ 1khz: 23.38K

These reading measured using an Extech 380193 using the "PAL" setting.
Inductance @ 120hz: 71.05H
Q as the secondary Parameter of Inductance @ 120hz: .3025
D as the secondary Parameter of Inductance @ 120hz: 3.304
R as the secondary Parameter of Inductance @ 120hz: 16.59
Capacitance @ 120hz: Will not get a reading
Q as the secondary Parameter of Capacitance @ 120hz: .N/A
D as the secondary Parameter of Capacitance @ 120hz: N/A
R as the secondary Parameter of Capacitance @ 120hz: N/A
Inductance @ 1khz: 7.930 H
Q as the secondary Parameter of Inductance @ 1khz: 1.441
D as the secondary Parameter of Inductance @ 1khz: .6938
R as the secondary Parameter of Inductance @ 1khz 71.91
Capacitance @ 1khz: 3.183nf
Q as the secondary Parameter of Capacitance @ 1khz: 1.448
D as the secondary Parameter of Capacitance @ 1khz: .6904
R as the secondary Parameter of Capacitance @ 1khz:72.31

Next is the resonance frequency. Mr. Joe Gwinn was kind enough to help me learn how to do this so extra special thanks to him. The resonance frequency was measured unloaded. Only the pickup (baseplate and cover attached) and 7" of lead wire were measured. Used to measure the frequency was an Extech MiniTec 26 DMM with a "frequency" setting and a 20hz to 20khz Tube Audio Oscillator. The accuracy is 1.5%

The AC Voltage read at the peak was 1.624V
The resonance peak was 7.2Khz (actual reading taken was 7.198khz).

I'll try to post Gauss readings when I get a minute.

If anyone else has (or has had) one of these pickups, I would love to have you post the the specs of yours.

ML

[Possum]

...

How did you do the peak measurement? I tried Joe's method a long time ago using a resistor, don't remember the details, I got vague readings on some pickups and could never find the resonant peak on some.

I"ve been meaning to try Audacity for this kind of thing, you plug your guitar into computer or preamp mixer and strums some chords etc. then select the section in the time line and it will give a frequency response chart. Stupid simple...

[Spence]

Well I'd like to know the name of your company Belwar.
And how about the username? Is it some reference to a Turkish computer war games character?

[belwar]

And how about the username? Is it some reference to a Turkish computer war games character?

It's actually a reference to a minor character in a series of books by my favorite author R.A. Salvatore. It's one of those things left over from my youth.. I love Forgotten Realms novels! They give me cool Ideas for inlays for headstocks.

[belwar]

How did you do the peak measurement? I tried Joe's method a long time ago using a resistor, don't remember the details, I got vague readings on some pickups and could never find the resonant peak on some.

I"ve been meaning to try Audacity for this kind of thing, you plug your guitar into computer or preamp mixer and strums some chords etc. then select the section in the time line and it will give a frequency response chart. Stupid simple...

It was surprisingly easy once I grasped the concepts. Joe is a very smart man, and his explanations go a little over my head. I'm going to write up a "plain English" article on how to measure resonance peak.. But I need to teach myself a few terms first so I can come up with the appropriate metaphors and such. Im struggling to understand what "impedance" and "self capacitance" are.

[jonson]

what was that other question Spence?

[David Schwab]

Well I'd like to know the name of your company Belwar.

It's it obvious?

It's Dissengulp Guitars.

[StarryNight]

isn't it obvious...he's Jean Larrivee!

personally, i like the suspense.

[belwar]

isn't it obvious...he's Jean Larrivee!

personally, i like the suspense.

Wrong again!

[kevinT]

I'm telling you he's a DiMarzio.

[David Schwab]

isn't it obvious...he's Jean Larrivee!

What's the saying... "Close, but no cigar!" Look at his initials to see why that's not him.

[belwar]

I'm telling you he's a DiMarzio.

Thems fightin words.


monkey bars, 3 oclock. Bring your winder.. W'ere having a wind off!

[belwar]

What's the saying... "Close, but no cigar!" Look at his initials to see why that's not him.

Damn there the message is so old I cant edit it!

[jonson]

Your fairly safe here kiddo. this forums all about sharing and that you do so no worries. Who said Jean, I saw him a few weeks ago in Frankfurt and he did look well. He was too busy with some customers to talk so missed out there.

[David Schwab]

I know as a fact it's not Jean.

You all have to keep guessing, but I'm not telling lol