Jump to content

stadl

Superherø MPC
  • Content Count

    1,872
  • Joined

  • Last visited

  • Days Won

    11

stadl last won the day on July 12

stadl had the most liked content!

Community Reputation

139 Charge

About stadl

  • Rank
    Primarch
  • Birthday 19/12/1973

Recent Profile Visitors

11,903 profile views
  1. stadl

    Post Your Latest Real Life Purchase!

    4WD goodies galore over the last month. 2019 Mitsubishi Pajero Sport in a stylish dark blue (and some nice features like 360 degree camera system and heated seats.... mmmm warm bum). Recovery gear (straps, shackles, maxtrax, shovel, safety gear) New compressor 120AH AGM battery, box, and Redarc DC-DC Charger 12V oven (because pies, pasties, sausage rolls etc when it's cold out camping are awesome) Tools (because.... excuse to buy tools) Cables, fuses, connectors etc, to wire up the second battery system, and fit my radio. Coming weekends will need to be dry enough to get the cabling installed - Need to build a few mounting brackets, so that was an excuse to buy a small vice-mounted pan-brake folder - more tools! Then (off) road trip!
  2. It can be for any, but I'd be more likely to have it for dinner. Also if you think baked beans & melted cheese is good. Try it with picked jalapenos added - Yum.
  3. stadl

    Anyone know much about power conditioners?

    Yes, the earth/ground is common to both the input and output of the filter. Remember at this stage, it's all still AC, so you have active, neutral and earth. After going through the filter, you still have active, neutral and earth, with 230V AC RMS between active and neutral - neither is connected to earth. But the filter will reduce noise between active<->earth and noise across neutral<->earth What this means, is that if you have an appliance that is never never connected to the mains wiring earth, these filters won't help as much - there is a small amount of filtering across active<->neutral. An earthed appliance does not just mean an appliance with a metal case connected to earth. The protective earth may be present in an internal chassis or PCB - so long as an earth is present, these filters will offer their designed protection. But the give away is that if there is no earth cable on the mains lead (it's a 2 pin/2 wire lead) then there must be no protective earth used in the circuit - which is quite safe for a double insulated device - and in that case, introducing an earth to the device would be dangerous. But using a earthed filter and not connecting the earth would be ok. Reminder, this is still working with dangerous voltages, and if you are not sure of what you are doing and your assembly skills, don't try this.
  4. stadl

    Anyone know much about power conditioners?

    It's unlikely it would have something like that in it. Budget devices are not known for having much filtering, and if they do, it is more likely a couple of extra components on the PCB rather than an off the shelf module like that. At 6A, it's good for about 1300W (at Australian Voltage) - more than enough for a TV and even a few home theatre devices except maybe a honking great A or AB class surround amplifier - and if you have one of those you probably aren't using a budget DSE TV :) If the device is double insulated (no earthed chassis) then best not to change the earth design. If it is using a figure-8 power lead, or a power lead without an earth pin, then forget using one of those filters, as they work by filtering common mode (line to ground) noise. If you have no ground on the power to the device, then there is no way for a line-ground noise signal to be the issue that this can fix. But if the device has a earth pin, and it's connected to some part of the PSU electronics - it may help, but no guarantees.
  5. stadl

    Anyone know much about power conditioners?

    They should cope if it was a small brownout. If it is switching noise then it may still crack the shits because the cheap PSU would not regulate well and the switching noise gets through onto the digital circuit boards that are expecting nice constant DC. I would strongly discourage changing capacitors in switching PSUs unless you know what you are doing. The old upgrade the caps fix is fine in linear power supplies where the capacitors are used to smooth the power. In that case it only holds the voltage through the fully rectified sinewave. Most of the time, the larger cap just means instead of going from 100% down to say 30% each cycle, it goes from 100% to 60% so it has more reserve capacity, and also because of the drop-off rate, the output voltage ripple is much lower. Under that upgrade, the capacitor change doesn't materially change the circuit design, other than slightly increasing the surge current into the capacitor (through the transformer and rectifier) for the first half sine-wave after power is applied. Switching power supplies are more complex, and their frequency, stability and efficiency can all be linked to the capacitance and inductance of parts of the circuit. Upset the efficiency and it may not operate within the thermal specification and could overheat leading to a bad day. In many designs it might be safe to upgrade the final stage smoothing capacitors. but other capacitors that are part of the switchmode circuit, much less safe - what design is it, and what is safe - hard to tell, so I'd be for not changing them. If it is an external PSU brick, then you could build a smoothing capacity circuit (electrolytic in parallel across the connection from the PSU to the device), but if it has an external PSU, you are probably better just trying to find a replacement from another device for testing - unless it is some odd-ball voltage or connector. DANGER WARNING ******** 240V construction!!! Do not consider unless you know about safe construction of 240V wiring ******** If it was me, I would consider building a budget 240V mains EMI filter to put between the cheap device and the power point and hope that cleans up the power enought for the shitty PSU Whack one of these in a a box with a GPO outlet or IEC Female panel mount, and you have an in-line filter. https://www.jaycar.com.au/240v-ac-emi-filter/p/MS4001 or https://www.jaycar.com.au/iec-emi-power-line-filter-6-amp/p/MS4003 I have a similar one for my HT system, but the filter I bought cost about $80. Disclosure: EMI filters exhibit a small amount of earth leakage by design - if you use too many of them , or a very sketchy safety switch, they can trip it - but these small ones are fine.
  6. stadl

    Anyone know much about power conditioners?

    It's an interesting thought on the power systems these days. A brown-out/power sag, is usually observed as an under-voltage event - either a straight voltage drop caused by power factor issues, or generator variances or a temporary capacity drop due to overload. If you exceed the capacity of a power source, the terminal voltage starts dropping. In days gone bye, many appliances were voltage sensitive, so when the circuit got overloaded, and supply voltage started dropping, some of the appliances would switch off, and thus you effectively have some load shedding that then addresses the overload Modern switch mode variable frequency and voltage PSUs will happily continue to generate load. As the voltage goes down, they just draw more current to keep the same power drain (watts) - so no serendipitous load shedding happens. Probably not that common on the mains, but certainly very easy to have happen with battery systems. e.g. a DC-DC converter plugged in to a car battery may happily suck the 12V battery to 3V or lower while delivering the output voltage to the device if it doesn't have low voltage cut-out on the input that would prevent the rechargeable battery being depleted to to the point it can't be recharged.
  7. stadl

    Anyone know much about power conditioners?

    When you say 'drops out' is it 1. The TV controller freak out/crash (conducted/mains noise) 2. The tuner that stops receiving signal (likely TV RF interference, although it could be getting in through the mains) 3. The TV powers off then on (brownout) - if so the wiring/switchboard in your house might be under specification if a local appliance is causing this. Mains Power conditioner can be an interesting term. There are levels of conditioning. Many are just analogue filter circuits that clean up the mains to remove induced/conducted noise from switching, motors or data appliances - let the 50Hz through, but stop the higher frequency junk and cost from a few dollars to a few hundred dollars and price should reflect performance (although your need may not justify top performance). A double conversion conditioner (not cheap options) will also correct voltage and frequency variations. This is all separate from surge/lightning protection filters which get rid of dangerous spikes - and of course many power conditioners include those, as they start with a $1 part but surge protection bits are usually self sacrificing, while filtering is continuous and non destructive. None of those conditioner devices address a brown-out where there is loss of power. If it is RF interference, then you will need a filter between the antenna and the TV to try and block the interference. Switching noise will be tough, but might be improved by a bandpass filter that reduces the noise outside the TV bands and in theory should improves performance within that band - but results may vary. A mats-head amp may also help if you are in a weak TV signal area, and by the time the signal from the antenna gets to the TV is is close to the noise floor - having a stronger TV signal will improve the TV's ability to decode it) If it was a specific and persistent interference from an appliance you would get a notch filter to take out that specific signal - but it doesn't sound like that. A UPS will address brownouts of course, and many UPSs include some power conditioning capability as part of their design, and they can be applied in a number of ways - to condition the noisy mains - to clean up the inverter waveform when running (either continuously in a double conversion, or for line-interactive part)
  8. stadl

    My mother died

    Sorry to hear that mate. Thinking of you and your family.
  9. Bar WiFi in a camp ground in Africa where a couple of dozen people were sharing a single 2G GPRS connection (about 64k) But hey, it was free at a camp ground charging about $5US per night - at a time when most accommodation in Australia would charge you $20/night extra for basic internet. And that was the month that my ISP f**ked up their webmail logon screen so that it included a 1MB+ image scaled down to thumbnail size, instead of a nice 10kB image - At least at that time they had a lightweight webpage option - I had a nice discussion with them that webmail is not just for people at home on broadband who don't want to run a mail app, and travelers in distant places need a low bandwidth option. But all was ok because I could still let my S60 symbian phone use pop mail through
  10. stadl

    Problems with the 737MAX ?

    According to google, Victorville is a disused USAF base that is now used a a logistics airport, with a aircraft storage lot (and a car storage lot), for mothballed aircraft and standby fleets. Doesn't appear to be a boneyard as much as a parking lot for ex-fleets aircraft - I don't expect they do much cannibalising there. Probably quite handy as a medium term parking place - can't have them filling up valuable real estate at major/regional airports.
  11. stadl

    Terror attack in NZ

    While he is a homicidal person expressing extreme racial hatred, I'd also call it terrorism. He may not be a member of a 'terrorist organisation' or even a 'lone wolf' inspired by one of them. He had a manifesto (not interested in reading it, or about it), as a political message that needed to be expressed through killing. He sent it to politicians and media outlets, that's pretty clearly terrorism in my mind. I get disappointed that the 'Terrorism' also gets thrown around a lot for fringe issues, acts of minor public nuisance, boycots and rallies, it gets belittled and sometimes even passed off as 'that T word' , Such cases are incomparable with this event.
  12. stadl

    just had a cool thought

    I remember reading 5-10 years ago that Rolls Royce had implemented a GPS/mapping aware cruise control and throttle system to assist with driving through the alps etc. It's intent was to know about upcoming hills (up or down) to ensure the right gear was selected early and allow it to smoothly maintain speed - you can't have a rolls lurch as you downshift to get more torque as you start climbing a hill of course.
  13. stadl

    Trust issues not helping me move on.

    Mate, that's a pretty bad run of luck with relationships, and hope it helped to write about it. I'm probably the last person to give relationship advice, but I would say that there's no fixed answers, and you have be comfortable with your choices, so if something is scaring the shit out of you, it's not something you have to force yourself to do. You say 'waiting for it to go pear shaped' is unfair to you and her. I imagine it's no fairer for either of you if you move in together and you're not ready for it. Relationships shouldn't have a script unless you both want it - Its up to you and her if there's any set milestones that should happen, and if there is a schedule.
  14. stadl

    Happy Invasion Day

    How about then instead of celebrating the date the constitution came in to effect, we celebrate the date it was passed into law. July 9th. Maybe not the best weather for BBQs and cricket, but good time of the year for a lamb roast!
  15. stadl

    Coffee... Bacon... COFFEE BACON!

    The future is here now! But from the recipe that sounds awesome - I prefer the more savoury ham and bacon to the sweet/honey styles, so I'm assuming the coffee would be good like that. Although I'm not sure I have the confidence to try making it myself, without a smoker - it's likely i'd under do it, or dry it out.
×