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MLXXX

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About MLXXX

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    Brisbane (ex-DTV Forum member)
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    Australia

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  1. MLXXX

    Trump

    I had been about to write a post about the U.S. president's inflammatory remarks made just prior to and at the swearing-in ceremony for Justice Brett Kavanaugh. However the following 7 minute video by CNN's Don Lemon covers not only that instance of crying "hoax", but also the president's characterisation of climate change, the death toll in Puerto Rico following Hurricane Maria, and of a number of other matters, as hoaxes:- Don Lemon: Trump threw gas on fire with remarks
  2. MLXXX

    Trump

    The situation reminds me of Bill Hayden's comment in 1983 that "a drover's dog could lead the Labor Party to victory, the way the country is" . In other words, almost any Democratic presidential candidate could be expected to beat Trump if Trump tried for a second term in 2020. However, what if Trump resigns and Pence takes over to complete the current presidential term in a stolid, unimaginative and uneventful fashion, restoring some measure of dignity to the office of U.S. president? That could act as a balm and reduce the outrage currently felt by many Democrat inclined voters against the Republican presidency.
  3. MLXXX

    Trump

    Conversely, the "toss-up" seats could all end up going to the Democrats, theoretically. The fact though that Kavanaugh has actually been sworn in as a justice of the Supreme Court, will tend to assuage pain felt by Republicans about the Senate confirmation process but may further embitter many Democrats. I will be interested to see what percentage of Democrat inclined voters actually vote in the mid-terms. There is a view that Democrats were lukewarm about supporting Hillary Clinton in November 2016 and in any case believed she would become president without any need for them to cast a vote personally. This time around a high percentage of Democrat-inclined voters are not feeling lukewarm about federal politics. I would expect a record turnout from Democrats in protest against the Trump administration.
  4. MLXXX

    Trump

    Polls are predicting that a Democrat win in the lower house is more likely than a Republican win. If that prediction is borne out, the Republicans will no longer be "in charge". (Mind you, the Republicans have not had much success with enacting health care related legislation in this presidential term, despite technically being "in charge"!) For a prediction of the outcome of the mid-term elections, see for example: https://www.politico.com/election-results/2018/house-senate-race-ratings-and-predictions/ That webpage currently predicts the following result for the House of Representatives:- 205 seats DEM TOTAL 202 seats GOP TOTAL
  5. MLXXX

    Power cord discussions

    No, I think the chemical engineer would consider the purpose of the cable, and the acceptable range of resistance and current handling capability specified by an electrical engineer for the cable to meet that purpose. The chemical engineer would then consider whether the manufactured cables would be likely to meet the specifications. The chemical engineer would have no basis for speculating that "of course different powercord of different size and material will sound different". (This is not a cable intended to pass an audio signal. It is a cable intended to supply power. There is no engineering basis on which to assume that the audio signal will differ simply because the power is being delivered to an audio device via a power cord A, rather than a power cord B. ) Unfortunately power cord threads usually lead nowhere, no pun intended.
  6. MLXXX

    Trump

    From https://edition.cnn.com/2018/10/03/politics/jeff-flake-donald-trump-christine-blasey-ford/index.html :- Washington (CNN) Sen. Jeff Flake, a key Republican swing vote on the fate of Supreme Court nominee Brett Kavanaugh, pointedly rebuked President Donald Trump on Wednesday for mocking Christine Blasey Ford. Speaking at a campaign rally Tuesday night, Trump cast doubt on Ford's testimony before the Senate Judiciary Committee by mocking her for not knowing the answers to questions such as how she had gotten to the high school party where she says Kavanaugh sexually assaulted her, an allegation he has repeatedly denied. "There's no time and no place for remarks like that. To discuss something this sensitive at a political rally is just not right. It's just not right. I wish he hadn't had done it," Flake told NBC's Savannah Guthrie on "Today," adding, "It's kind of appalling."
  7. MLXXX

    Trump

    I note that a differently constituted United States Supreme Court might find overturning the principle decided in Roe v Wade a step too far, in view of the stare decisis judicial convention that binds courts to follow decisions of higher courts, or of the same court. Even though Trump may succeed in changing the balance of the Supreme Court to a conservative majority, that may well leave the authority of Roe v Wade intact. Here's an article that discusses the matter: Why Roe v. Wade is most likely not in grave danger no matter whom Trump nominates
  8. MLXXX

    Trump

    @rocl444, perhaps God Himself has informed Pat Roberston that the accusers are lying. I find it hard to understand how anyone can have the moral certitude to invite others to pray to confound accusers about events alleged to have taken place so long ago, and which have not been investigated. I gather that the judge was only around 17 or 18 years of age at the time of the alleged improper sexual conduct. Who knows what level of maturity he had at that time, and what ability he had to resist the influence of alcohol, or even to remember events if he was in fact under the influence of alcohol? I certainly don't know. As I say, perhaps Pat Roberson has been informed by God.
  9. Yes I had to wonder myself why industry insiders would be "stunned" at the sudden response of the Hornsdale facility in the middle of the night. (It's delightful it did what it should have done.)
  10. (I quoted the page for Tasmania simply because for the last quarter of published summary figures for grid frequency deviation, the 2nd quarter of 2018, that state reportedly performed worse than the mainland. No doubt other reports would show the mainland deviations as being the more severe.) Some readers may not be aware that Basslink utilizes DC, thus making it possible for Tasmania to bolster the grid in Victoria without any need to match power grid frequencies as between the two states! * * * I note that in the last couple of decades various factors have contributed to lessening the short term frequency stability of power grids in some parts of the world, including use of plant with reduced rotational inertia, and a tendency to operate plant in a manner that reduces costs (in the face of aggressive bidding for supplying power), but which provides less reserve capacity. However a technological factor that goes in the other direction is the emergence of the use of very large batteries and associated inverters to generate AC. This article about the Tesla big battery in South Australia supporting frequency stability and voltage in Queensland, when a 560MW power plant went off-line suddenly and unexpectedly in December 2017, illustrates the value of this technology in bolstering network stability: Tesla big battery outsmarts lumbering coal units after Loy Yang trips
  11. I've noticed that a number of people on this forum have expressed concern about mains power quality. And I've noticed that a small number have mentioned that they were sufficiently concerned that they actually took steps to generate (or regenerate) their own stable mains power for their hi-fi equipment. The OP has asked whether a power regenerator contributes anything to the hi-fi system. My answer would be that in most parts of Australia, with most equipment, for almost all of the time, the mains power will fall within a range of voltage, frequency, and DC offset that will not cause audible ill-effects. There is one aspect though of mains power that I do occasionally notice causing an audible impact: the control tones the supply authority may superimpose on the mains supply at various times of the day or night to control off-peak relays in consumer switchboards (notably for electric hot water systems). I've noticed that in Brisbane, a series of bursts of the 1050 Hz control tone will last for around 30 seconds. Most modern hi-fi equipment is immune but 1050 Hz tones may occasionally be heard coming from loudspeakers. (The control tones may also be heard coming from the windings of electric motors.)
  12. For the second quarter of 2018, I see that Tasmania performed badly in respect of mains frequency deviations. The extract below is page 9 of FREQUENCY AND TIME ERROR MONITORING – 2ND QUARTER 2018 FOR THE NATIONAL ELECTRICITY MARKET. I hadn't realised the mains frequency could drift as much as is reported here. It certainly would make use of a record turntable that utilized a synchronous motor a risky proposition! I'm not sure though that there would be any particularly noticeable effect on other hi-fi equipment. For example, a power transformer intended for a nominal 50Hz mains would operate ok for a short period at 49Hz (a 2% deviation) I would have thought. It's possible that transformer buzz could become a little louder if one had one's ear near the transformer; and measured mains ripple in the DC power supply prior to any regulation would be a little higher.
  13. "usually not the worst performing" - what usually are the worst performing characteristics? (Thanks btw, @rmpfyf, for your detailed reply to my post.)
  14. Well voltage-sensitive audio equipment typically does include a regulated power supply, That has been the norm for decades. I'm not sure what you mean by "other compromises". Mains voltage distributed to a residence will routinely vary from time to time during the day and the actual voltage at a power point will be affected to some extent by the current drawn by appliances elsewhere in the residence. Manufacturers of audio devices are aware of that and will typically design to ensure the device will function correctly over a reasonably wide range of voltage variation. If a person has an audio device that lacks power regulation and produces audibly impaired sound as a result of that, in circumstances where the mains voltage varies by even a small amount, I suppose the person has two basic choices: replace or modify the audio device, or provide an externally regulated AC supply. If premises experience extreme voltage variations beyond the Australian standards for mains power, that's another issue. Where I reside in Brisbane the mains voltage does vary but not excessively. The variation probably affects the time for the washing machine spin-dryer to get up to speed. It can slightly affect the brightness of some of the lights in the house if one observes very carefully. I guess if someone were very concerned (e.g. if they possessed audio equipment lacking built-in regulation and likely to be sensitive to mains voltage variations) they could purchase a variable transformer to test the performance of the audio equipment at different voltages. Here is an example of a variable transformer rated at 500VA and which provides a voltage readout: https://www.jaycar.com.au/0-260vac-variable-laboratory-autotransfomer-variac-500va/p/MP3080. I'm not recommending anyone do this, but it would be a logical course of action if one were really concerned about impaired sound quality resulting from even small variations in mains voltage. A less expensive approach would be to simply monitor the mains voltage and wait for it to change. A device to measure the mains voltage some people might find convenient would be something like this: https://www.kogan.com/au/buy/kogan-power-usage-meter/?utm_source=google&utm_medium=product_listing_ads&gclid=EAIaIQobChMI5rjntffd3QIVDD5gCh1n5w1_EAQYAiABEgL0oPD_BwE.
  15. DAB+ radio in Australia commonly uses 64kbps nominal (which is less than that for the actual HE- AAC audio after deductions for error correction, and slides). Digital radio, as implemented in Australia, has generally favoured a high number of program services over high audio quality. I have found television sound using mp2 distinctly irritating. It is much less efficient than mp3. Mp2 has been used particularly for Standard Definition TV broadcasts. For my ears, the old analogue broadcasting FM sound used for television was better.
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