Jump to content

Zaphod Beeblebrox

  • Content count

  • Joined

  • Last visited

  • Days Won



About Zaphod Beeblebrox

Profile Fields

  • Location
  • Country

Recent Profile Visitors

20,875 profile views
  1. Fancy Power Points - are they worth it?

    You could specify 15 Amp sockets, which are a little more substantial than regular 10 Amp ones. They cost A LOT more though. Will there be any sonic difference? No.
  2. DIY power cable

    Correct. Utter and complete bollocks. Let's examine: * Neutrik power connectors are approved by every major approval organisation on the planet. That means they are safe. * Neutrik power connectors (20 Amp ones) are rated for a connection resistance of LESS than 0.003 Ohms. * Insert material is polyamide, locking element is zince diecast, shell is polyamide and the strain relief is polyacetal. Connectors material is SILVER (the lowest resistivity metal known) over bronze. These materials are far from "very average". They are PERFECTLY suited to the task. Unlike, say, gold plating, which is, invariably, thinly plated, very soft and much higher resistance than silver. Rhodium is better, in the sense that it is a tougher metal, but is much inferior to silver WRT conductivity. * Dielectric strength is rated to 2,800 Volts AC. * Insulation resistance exceeds 100,000,000 Ohms. * Neutrik power connectors are rated for AT LEAST 1,000 mating cycles. * Wire size up to 2.5mm CSA. * Contact plating material is THE BEST available. Not the inferior gold or rhodium used in over-priced connectors, but the far superior silver plated contacts, which not only offer the lowest resistance of any metal on Earth, but plating thickness is 4um. Plating is over bronze, for maximum durability. * Contacts are 'wiping' type, thus ensuring a clean, solid connection every time. The Neutrik power connectors are vastly superior to any over-priced, over-hyped IEC connector. IEC connectors are much like RCA connectors. They were always designed to be cheap. They were never designed to be the highest quality connector available. Neutrik connectors are fully and completely specified, unlike IEC connectors, which are very much a 'crap shoot'. Some are rubbish and some are reasonable. The very best IEC connector is a long way behind the Neutrik power connectors. If they really cared, the IEC manufacturers would use silver plating, not the significantly inferior gold or rhodium plating. http://www.tibtech.com/conductivity.php
  3. NAD 3140 repair (no sound)

    Why do you think it is a capacitor that has failed? The most common failure mode for SS amplifiers, is the output/driver devices, along with associated resistors. Without a multimeter, you are in for a world of pain. Here's what you need: * A schematic/service manual (+ knowledge to read and understand it). * A suitable multimeter (absolute minimum). It would be nice to have: * An oscilloscope. * Dummy loads. * Signal generator. * Experience to correctly use the above.
  4. Panasonic Capacitors? & Desoldering Gun?

    Not really. The Hakko is a good deal. Cheap Chinese desoldering irons are only just usable. For occasional use, they're OK. For daily use, not so much.
  5. Panasonic Capacitors? & Desoldering Gun?

    If you want a cheap Chinese tool, you can have my one of these for $150.00: http://www.ebay.com.au/itm/like/132112930432?chn=ps&dispItem=1 Barely used the thing. Everything works, but not as good as the Hakko (obviously). It does everything.
  6. Panasonic Capacitors? & Desoldering Gun?

    NO idea. I doubt it could come close to a Hakko. In any case, an all in one unit, like the Hakko I referenced will almost always be better than one where the pump is remotely sited, due to the fact that the flexible pipe carrying the vacuum will 'suck in', thus some of the vacuum will be lost. An in-handle pump will be heavier (though the Hakko is very well balanced and not too heavy), but it cannot lose any vacuum. There are some other nice features with the Hakko too. The tips are the best I've ever seen/used and the major components are cast stainless steel. Built to last a very, very long time. Worth every penny. Though, since I use it every day, professionally, I can easily justify the cost. Also, FWIW, I've owned 4 or 5 desoldering irons (ranging from cheap, Chinese things to expensive American made things). The Hakko stands head and shoulders above them all. And that includes two older Hakko units, where the pump was remotely placed.
  7. Interested in listening to a Valve Amp

    A "dirty power supply" will not blow all those wonderful valves. Valves are quite robust and able to deal with short term power fluctuations very well indeed. Moreso, with Earle's products, since his transformers are simply the best in the business.
  8. Panasonic Capacitors? & Desoldering Gun?

    That's quite normal for any repair job. And yes, avoid Jaycar like the plague. Ripple current, temperature rating and life span. I use one of these: https://www.wagneronline.com.au/hakko-fr-300-portable-desoldering-tool/soldering-tools-hakko/new-products/972739/fl/ It's an excellent, economical choice.
  9. PrimaLuna; standard vs HP

    If you are planning on a speaker upgrade, then you should choose your amplifier AFTER you decide on your speakers. NEVER before. And I see no reason why, when buying an expensive item, you should expect to be able to trial the product before purchase. If you cannot, go elsewhere.
  10. Tube buffer

    Let us not forget the (usual) INCREASE in output impedance, which is the precise opposite of what a buffer is designed to do.
  11. Panasonic Capacitors? & Desoldering Gun?

    Just look for (at least) 105 degree C rated caps, with long life (at least 10,000 hours). CRT TV sets are not critical for the most part. If it has a SMPS (Switch Mode Power Supply), then you need to use caps that are rated for that purpose.
  12. 110 volt versus 240

    No question, that the more reputable Chinese manufacturers do tend to produce high quality products. However, I've seen some horrors. In fact, I think I would be safe in saying that China is responsible for some of the most atrocious designs let loose on the general public. A few weeks back I had a Chinese preamp in for repair. The thing was running really hot. The fault turned out to be a very poorly specc'd power transformer. Although stamped with a 230VAC rating, I found that it could not operate past 200VAC without saturating. Once in saturation, of course, the transformer ran very, very hot. It was a fire risk. What surprised me most was the fact that it lacked an internal thermal fuse. It was clearly unsafe. All that aside, if the (Chinese) product has been imported by a reputable importer and has a reputable brand name, then it is reasonable to assume it is probably a safe product. Foreign eBay suppliers can probably be excepted.
  13. 110 volt versus 240

    It's mostly not a major problem, but it can be with some products. I've found that quality products (mostly Japanese) tend to have enough iron in their transformers to work without problems. Cheaper US built products can be a problem. Chinese products are, IME, a crap shoot. Unless they have US or Japanese overlords.
  14. Great camera. I love mine. Very versatile.
  15. Any one know what these speakers are?

    Yep. Agreed with the others. The speakers are Linear Design. Tweeter is a venerable (but pretty ordinary nowadays), Philips dome tweeter. Mid looks like a ring-in. Bass driver could be a Tonegen. Impregnated cloth surround? Not a bad old bass driver. Cabinets look to be well made. Sound can be expected to be pretty ordinary, given the fact that Linear Design never bothered with proper crossovers. Good garage speakers.