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rabski last won the day on July 27

rabski had the most liked content!


9,403 Excellent


About rabski

  • Rank
    Everything in moderation
    Veteran Wammer
  • Birthday 17/06/1956

Personal Info

  • Location
  • Real Name

Wigwam Info

  • Turn Table
    Well Tempered/GL75
  • Tone Arm & Cartridge
    AT 50ANV
  • SUT / Phono Stage
    Kairsound/valve DIY
  • Digital Source 1
    Stable platter/CD63
  • Digital Source 2
  • DAC
    DIY AD1865/assorted
  • Integrated Amp
    Lost count
  • Pre-Amp
    Various valves
  • Power Amp/s
    845 SET/others
  • My Speakers
    Living Voice
  • Headphones
  • Trade Status
    I am not in the Hi-Fi trade

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  1. Ditto (not sure what is needed or planned here). You could use a contact cleaner (deoxit or similar), but not a 'lubricant' as this will potentially be a poor electical connection. Either way, a spade connector shouldn't break off unless you're being careless. All that said, the best spade connector is no spade connector. If it was me, I'd solder the things.
  2. Added confusion basically. The actual characteristics of an EF86 are not really relevant, because it's totally unclear what their function is. Whatever, you are not setting 'bias' here, because that is not the issue and there is no real 'bias' setting in a power supply. At a rough guess, I'd assume each EF86 and pair of 6C1P are run as some sort of 'janus' shunt voltage regulator, though it does seem somewhat unnecessarily complicated. My next guess would be that the trim pots set the grid voltage to determine the regulated output voltage, though 'guess' is definitely the right word here. Basically, I would agree with Alan. Leave well alone if it sounds good.
  3. Even odd-order distortion of below 0.1% should be inaudible, so I very much doubt that any characteristic sound will be the result of distortion at that level.
  4. Sorry, but none of the first post makes any sense at all. EF86 is a pentode valve normally used in a gain stage. There should not be anything near 270 volts anywhere on an EF86 and there is no need to set any bias on one either. The only picture I can find shows an integrated ampifier with points on the rear panel to measure bias.
  5. As for the OP. I very much enjoyed the three or four days of summer that we had here. With luck, we may get another one next year.
  6. Ah. Pleased to see that the spirit of romance lives on.
  7. rabski


    It's music. Hence it's always personal taste. I'm lucky enough to have passing aquaintance with a handful of reasonably well-known musicians, and no two of them will ever agree on the 'best' of anything either. I can't even agree with myself on my favourite piece of music.
  8. rabski


    To me, some of it is dated because the first time I saw it performed live was about 37 years ago. It was, and remains, a incredibly good album. The 'best' of their albums is very much a matter of personal taste. My own top two would be Meddle and The Division Bell, but I equally have a soft spot for most. I think many of us suffer from the overexposure to DSOTM and the insistence of people that it, and the Wall, are the two greatest albums ever made. Which is total bolleaux.
  9. Actually, in this case it is straightforward. It's a single-ended valve output stage amplifier. It will not clip into HF distortion peaks and will not cause the sort of issues that damage tweeters. Whether the combination will work (I doubt it with the LS50s) is another matter. It may not sound ideal, at least it's unlikely to at higher volumes, but it wont deliver tweeter-damaging problems when it distorts.
  10. rabski


    I'm as big a PF fan as you'll find. In common with others, however, I don't personally think it's their best work. There are some excellent tracks, some not so excellent tracks and some notably dated tracks. Apart from in terms of revenue, I don't think any of the band members hold it in the regard some people do either. As for the 'benchmark', sorry, but there are many albums that set a benchmark for different aspects, but to be fair, DSOTM mostly sets a benchmark for commercial success.
  11. If the circuit is single ended, then the + and - carry the signal, but the '-' is either connected to ground or referenced to it in the actual equipment. You can either use a cable that has two conductors and a shield, or one conductor and a shield. In the latter case, the shield is the '-' part of the circuit. In the former case, the shield is connected to the '-' preferably only at the source end. You should not leave the shield floating, as it will not only provide no noise rejection, but will actually do the opposite.
  12. Quite apart from bringing back some incredibly poignant memories of '76, that has one of the most beautiful tracks ever IMHO: Revelations.
  13. I know G. But not all SUTs are nickel. Old-fashioned good practice! Either way, it's pointless as the DCR of a transformer winding doesn't help here.
  14. The recommended is actually stated as 'greater than 10 ohms' mate, so the '12' setting or the '40' setting. There is no fixed rule. The idea of resistive loading for an MC is as much to stop the phono stage having issues with high-frequency signals as anything else. Some phonos can do all sorts of nasty stuff with signals outside (above) the audio range, and as an approximation, adding some resistance across the cartridge output forms effectively a filter network. Basically, use what sounds best. If there's more treble and no harshness or distortion, then I'd suggest that's what it's supposed to sound like. The loading shouldn't reduce the treble, as that means it's filtering in the audion region.
  15. Sorry John, but you should never, ever put a normal ohm meter across a step-up transformer. It is possible to damage high-ratio SUTs by magnetising them with a DC input from even a simple meter. Anyway, if there is a step-up at the input, then you won't get a reading that reflects the effective load. Even if you don't damage the transformer, all you'll get is a measurement of the coil's DC resistance, which will defintely not be the reflected actual impedance. Knowing the SUT ratio is the only way to figure out the actual effective load.
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