JL Sargent
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Posts posted by JL Sargent
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OK, thanks guys. Study on Q and dissipation next.
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This LH2821B meter is available from several sellers on Ebay. Some of these sellers claim it can do ESR (equivalent circuit resistance) also which is of interest to me. That feature on this meter not nearly as obvious as other meters like BECs BK 885 meter.
What do you guys think of this meter and how does it do ESR, a measurement I'm new to? The Ebay ad has a PDF link to the manual also. I notice it has a Parallel/Series button which may be the ESR function? Seems like a good bang for the buck if it does everything.
This item number is 220413136240 -
JB, that's what happens when you gamble and loose.
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Thanks Gartenman, now I know what to do with that old Dual turntable.
Garymd " I stopped going to thrift shops" Now that's just down right nuts right there.
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Before JJ even had that note digested good I bet they drummed up another Caymus 2007 Special Selection Cabernet Sauvignon.
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Overtime in Olympic hockey is sudden death, right? So the first one to score wins. Never heard that situation decribed as
"not a chance". Winchester, did you watch it?Also, any team with Ryan Miller as goalie has a chance. -
Ryan Miller......MVP
Sydney Crosby......NHL Golden Boy, and for a reason. [
]Ryan Miller got a great ovation during the medal ceremony in recognition of the Olympics he had.
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Russ, you obviously need a refresher.[
]Watch Charles Hamelin's hand at the end. He is in SECOND.
http://www.nbcolympics.com/video/assetid=ede93805-04c1-4dfa-a50f-640205f6163a.html#ohno+disqualified+500m -
Multi carb two stroke engines are always subject to unequal fuel/oil delivery problems between the carbs. I've gone through two V6 two stroke outboards on my boats due to problems related to carb/fuel issues. Keep fresh gas in your big motors.
On single carb two stroke engines I have always "run em dry" without issue.
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James, if your into critical listening I would suggest new pressings. If your like me and a casual listener then I suspect good clean used copies would suffice. That's about what my whole album collection is. I see no reason to spend thousands on a TT for my old used records. On the other side of that same coin, I see no reason to spend big money on new pressings when good used stuff is available for my less than golden ear.
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Hey Bill, did you watch slow motion replay? It clearly showed the 2nd place Canadian Charles Hamelin (eventual winner) with his hand pushing the hip of the Korean leader as he fell to the ice. No foul called on that one yet at the same instance Ohno got a foul for an even lesser touch. As Ohno said, "It's very subjective"
Call both a foul or neither, but get it the same.
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That's good stuff Bob. Thanks. Now to hunt me up one of those meters or similar.
Apparently the BK 886 adds the in-circuit testing capablility with a 100Khz test frequency?
I'm sure that feature cost more dollars. That's a nice meter you have there Bob.
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IMHO Al Green would sound much better on the VRDs.
As for the horn talk. I prefer my 24"x12" Dukane horns over the K400, 500, etc. but then that's just getting too big!!!
It's all about compromises.
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Can you measure the ESR of caps in circuit? I have a vibration analyzer that has quit working. I suspect the power board is bad which has lots of small caps on it. The equipment is no longer manufacturered or supported so I'm looking for cap testing possibilities.
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VRD's in the sound system......YES
Tom Petty wailing in my livingroom......uh, NO. [N]
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Wow, if you got $700 out of Philips for your 4 yr old TV you should change the title of the thread to "Philips saves the day"
You can go buy a new 42" LCD TV for less than that!
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Hmmm. So the capacitance was likely still within tolerance yet literally no current flow. That's really interesting.
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I have the LG CU500 and have been real happy with it. I've heard it called the Razr killer. Sound quality good. I don't know about the 400, maybe its newer? I have had this CU500 for about 2yrs. I notice it's less than 50 bucks on Ebay.
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I really enjoy "cool jazz" on my Klispch speakers. I have some Bill Evan's Trio going right now.
Also, the older you get, the better the horn loaded speakers sound IMHO. I suspect if you give the Cornwalls a chance you will take them.
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We have a garbage bag full here from a Mardi Gras party last week. We have been having some fun with them. When my bride walks in from work, I throw a string or two her way. Wayne Toups playing on the stereo.
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have plenty at home and lost interest.
Say it ain't so Dtel, say it ain't so!
[6]
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I think your dead on with most of that stuff. My wife is from Lake Charles. We drive over regularly. Maybe you went to Vallier's Home Decor in Beaumont? That was my Bro-n-law.
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Nah, not that good. I just thought a little music would be nice with the wine.[
]Although I was pulling for the Saints, I really thought Payton Manning and the Colts were gonna beat them by at least the spread. The chips absolutely fell the Saints way. If you play that game 6 times I suspect the Colts win 5 of them. It was just a magical day for the Saints. I was totally floored by the whole deal. Next year it will be the Colts against ????
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Check out this LCR meter with ESR capability?
in Technical/Restorations
Posted
Here is a link to the company's website. They make all kinds of test equipment. I don't doubt its a good meter. I would suggest buying from a state side seller though, to insure getting the proper 110v transformer.
http://www.tonghui.com.cn/eng/ShowProInfo.asp?Product_id=106
Also found this good read in case others are interested:
In physics, the dissipation factor (DF) is a measure of loss-rate of power of a mode of oscillation (mechanical, electrical, or electromechanical) in a dissipative system. It is the reciprocal of Quality factor, which represents the quality of oscillation.
For example, electric power is dissipated in all dielectric materials, usually in the form of heat. In a capacitor made of a dielectric placed between conductors, the typical lumped element model includes a lossless ideal capacitor in series with a resistor termed the equivalent series resistance (ESR) as shown below.[1]
The ESR represents losses in the capacitor. In a good capacitor the ESR
is very small, and in a poor capacitor the ESR is large. Note that the
ESR is not simply the resistance that would be measured across a capacitor by an ohmmeter.
The ESR is a derived quantity with physical origins in both the
dielectric's conduction electrons and dipole relaxation phenomena. In a
dielectric only one of either the conduction electrons or the dipole
relaxation typically dominates loss.[2] For the case of the conduction electrons being the dominant loss, then
of a lossless ideal capacitor in series with an equivalent series
resistance (ESR). The loss tangent is defined by the angle between the
capacitor's impedance vector and the negative reactive axis.
If the capacitor is used in an AC circuit, the dissipation factor due to the non-ideal capacitor is expressed as the ratio of the resistive power loss in the ESR to the reactive power oscillating in the capacitor, or
When representing the electrical circuit parameters as vectors in a complex plane, known as phasors, a capacitor's dissipation factor is equal to the tangent
of the angle between the capacitor's impedance vector and the negative
reactive axis, as shown in the diagram to the right. This gives rise to
the parameter known as the loss tangent δ where
Since the DF in a good capacitor is usually small, δ ~ DF, and DF is often expressed as a percentage.
DF approximates to the power factor when ESR is far less than Xc, which is usually the case.
DF will vary depending on the dielectric material and the frequency of the electrical signals. In low dielectric constant (low-k), temperature compensating ceramics, DF of 0.1% to 0.2% is typical. In high dielectric constant ceramics, DF can be 1% to 2%. However, lower DF is usually an indication of quality capacitors when comparing similar dielectric material.
References