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Topic: Pickup DC Resistance 1000KOHM!!?? |
Jackiso
From:
Yokohama, Japan
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Posted 7 Mar 2006 9:45 pm |
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I and my friend each replaced stock pickup of Excel JB Frypan with Jason Lollar's real horseshoe type. It was a big success. Before we re-did wiring, pot value etc, we checked DC resitance of the Excel pickups and the meter read incredible figure, that was around 1000KOHM or 1MOHM. Is this normal? Before the Excel pickups were removed, both were working fine.
Jack Isomura
Yokohama, Japan |
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Jerry Erickson
From:
Atlanta,IL 61723
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Posted 7 Mar 2006 10:36 pm
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Sounds like the pickup is open to me. A typical reading would be between 7K to 22K with modern guitars being between 17-22K. Here's a link that explains somewhat,what an open pickup is.
http://www.provide.net/~cfh/pickups.html |
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John Daugherty
From:
Rolla, Missouri, USA
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Posted 8 Mar 2006 5:20 am
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Another possibility is an inaccurate meter or a lack of understanding how to use the meter. Try measuring the resistance of a 22k ohm resistor or any value in that range.
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www.home.earthlink.net/~johnd37
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Erv Niehaus
From:
Litchfield, MN, USA
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Posted 8 Mar 2006 6:39 am
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Maybe you read the meter wrong. It could have been 10,000K.
Erv |
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Michael Garnett
From:
Seattle, WA
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Posted 8 Mar 2006 6:49 am
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| Slap it over to AC ohms and try it again. Impedance happens with alternating current, resistance happens with DC. |
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Jackiso
From:
Yokohama, Japan
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Posted 9 Mar 2006 2:04 am
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Thank you folks. After all tries following your advice, 1000Kohm still stands.
- Is the pickup "open"? : I can't tell for sure but it sounds all right.
- Inaccurate meter? : I use two meters,digital and analog. Both are not for pro-use but do their job fairly well. Checked with 50K resistor and 1M pot and they read fine.
- Read the meter wrong?: Likely. After big booze I saw my wife pretty. 
- AC ohms?: My meters can't measure impedance.
I shouldn't be paranoia too much on this thing as I will not put the pickup back to the Excel frypan. But---you know, just curious.
Jack Isomura
Yokohama, Japan |
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basilh
From:
United Kingdom
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Posted 9 Mar 2006 2:38 am
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Hello Jack.
If the pick-up still works when connected, there is a mistake in the methodology of the reading !!
.. at the moment I am getting VERY close to suffering from "karoshi" !!!
Anything of 'Jules' that you want tabbed ?
BTW how accurate did you find the 'Sand' tab ?
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| Steel players do it without fretting |
 
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Jackiso
From:
Yokohama, Japan
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Posted 9 Mar 2006 3:57 am
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Baz,
---methodology of the reading?? I put glasses on, the pick up placed under the reading lamp turned on, what else missing?
I sent you an email on the second half of your post.
Jack Isomura
Yokohama, Japan |
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basilh
From:
United Kingdom
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Posted 9 Mar 2006 8:31 am
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Jack..
You conjure up a picture of a man squinting through thick lenses !!
That's NOT what I meant..
I mean maybe the meter is being misread like the decimal point isn't being taken into consideration..
Still problems at my end here Karoshi (???) imminent !!
Too much work .. Not enough time left to accomplish it all !!
BUT, I am trying (So I've been told)
Baz
BTW Belated Happy Birthday.. Over here that milestone would entitle you too free travel and various other dubious benefits..[This message was edited by basilh on 09 March 2006 at 08:33 AM.] |
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Ray Minich
From:
Bradford, Pa. Frozen Tundra
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Posted 9 Mar 2006 12:31 pm
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1 meg might either be the top of the meter scale at that setting or it may be whatcha got given that the coil has gone "open".
Whaddaya get at max/peak scale across your fingers? I get about 12 meg from one thumb to the other (with the test lead probes) on the 20 meg scale on my Bechman HD-110T DVM.[This message was edited by Ray Minich on 09 March 2006 at 12:34 PM.] |
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Rick Aiello
From:
Berryville, VA USA
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Posted 9 Mar 2006 4:46 pm
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| Quote: |
| I and my friend each replaced stock pickup of Excel JB Frypan with Jason Lollar's real horseshoe type. |
Ahhh ... you were the two guys I made those magnets for ... they are the last of their kind ... enjoy.
Oh ... my Excel (mid 80's) JB Frypan's stock pickup is 14.24 K Ohms ... just went down, dug it outta a box and measured it for you.
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Jackiso
From:
Yokohama, Japan
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Posted 10 Mar 2006 4:16 am
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Rick,
Yes, we are very privileged to have your last works of art. In the opening post I wanted to give a big fanfare to the excellence of the replacement pickup made jointly by you and Jason but rather opted to give a low-key comment because I was afraid that anyone who gets interested in the pickup would be disappointed as it's no longer available. Rick, we really wish you return someday soon to the wonderful world of HORSESHOES. In addition, I treasure the frypan knob you so kindly hand made for me.
Thank you so much for taking troubles of metering the Excel pickup. I will have it checked by Excel to conclude the mystery once and for all.
Jack Isomura
Yokohama, Japan |
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Donny Hinson
From:
Glen Burnie, Md. U.S.A.
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Posted 10 Mar 2006 5:11 am
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1,000kohms or 1 megohm means it's open. Sounds to me like you damaged the old pickup when you removed it.  |
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Peter
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Posted 10 Mar 2006 10:28 pm
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Could it be that there is some built-in internal circuitry?
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Peter den Hartogh
1978 Emmons S10 P/P; 1977 Sho-Bud D10 ProIII Custom;
1975 Fender Artist S10; Remington U12; 1947 Gibson BR4;
[This message was edited by Peter on 10 March 2006 at 10:29 PM.] |
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