Jazid

Wammer
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About Jazid

  • Rank
    Wammer
  • Birthday Private

Personal Info

  • Location
    London
  • Real Name
    James

Wigwam Info

  • Turn Table
    Micro Seiki
  • Tone Arm & Cartridge
    AN/Io
  • SUT / Phono Stage
    AN/Art Audio
  • Digital Source 1
    Runs Windows 7/64
  • DAC
    AN/Sabre
  • Pre-Amp
    SJS/Bottlehead
  • Power Amp/s
    Tron/Leak
  • My Speakers
    AN-E
  • Trade Status
    I am not in the Hi-Fi trade

Recent Profile Visitors

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  1. Jazid

    Thinking of Lodgesound (Stewart Emmings)

    Consistently the best sound I heard at Scalford, he was an oracle for reel to reel and all round good 'un.[emoji106] Sent from my BLA-L09 using Tapatalk
  2. Jazid

    PIO capacitors

    As a man on record for not liking to stupidly exceed the capacitor's voltage rating how do you explain this oddity? Do they mean, say 250V rather than 630V, with a bit of a safety margin, in which case we're talking a crappy 8kW amp into the speaker? How does this 'science' work Sent from my BLA-L09 using Tapatalk
  3. Jazid

    PIO capacitors

    Bizarre take on a spec that. What possible loudspeaker accepts 630 volts into a crossover? That amounts to an amp with a Krell/Levinson emasculating 49kW output [emoji44]. I think hifi collective may have made a typo... The lack of self healing might be a clue, but I'd avoid for any purpose whatsoever unless this is properly explained. It doesnt, on the face of it, add up at all [emoji2957][emoji12] Sent from my BLA-L09 using Tapatalk
  4. Jazid

    PIO capacitors

    Umm, polypropylene; no degradation, no stress, cheap. I thought Hovland's were polyprops anyway? Sent from my BLA-L09 using Tapatalk
  5. Jazid

    PIO capacitors

    Perhaps change them for non foo polyprop and see if there is any sonic difference, and if so whether it is significant to you. They shouldn't be too much money depending on voltage. I don't know the amp or the circuit so have no axe either way, just that most people say caps don't make a huge difference and in some positions no difference. Of course Icon will have chosen them for some reason, but it is possible that reason wasn't (at least solely) sonics. P.S. I'm not trying to start an argument with capacitor fundamentalists here [emoji3577], enjoy the ride. Sent from my BLA-L09 using Tapatalk
  6. Jazid

    PIO capacitors

    Yes I have had the same problem, although to be fair on 50 year old caps. Can't help you with sonics but if you're not afraid of a bit of DIY why not have a play and report what you find? Sent from my BLA-L09 using Tapatalk
  7. A couple of points about the Tesla in the image: did you order an ECC803S ? If so that's what's in your pic, but the Tesla frame grids are E83CC as per my earlier post, and it is these are structurally the Telefunken equivalents. Not that there is anything wrong with their '803S, but chalk and cheese. It is very confusing as the 'S' apparently meant Spangitter in German or frame grid if Jacmusic is to be trusted (very probably). This was the Tele original, for some reason Tesla renamed it to E83CC, and produced an 803S for no good reason known to man, and that was essentially a long ladder plate tube of no particular distinction. Re. Failure of a tube, it's difficult to know. See what the seller has to say, they should replace them FOC. The most likely issues would be gas or cathode to heater short. The latter could conceivably be a transit related issue, gas is just a duff tube. But there is no obvious loss of gettering in either so gas is not obviously likely. It could also be that Tesla's often have slightly thinner pins than other valves. This can make the socket contact a bit loose. Try to wiggle the valves around a bit in the socket, they should be reasonably tight, not loose. Of course it could be the 12AX7 as well. If you have a known good valve of either (or both) persuasions it may be worth subbing (initially both) in to see if the issue resolves. If it does, you can narrow down to which valve, if neither it might be another component in the amp. If you want me to test the valves just PM me and I'll do it. Sent from my BLA-L09 using Tapatalk
  8. Re. 5751 I have also found them underwhelming on occasion, but in my case it's difficult to separate out the sonics from the lower gain which is the only real reason to choose them in the first place. If I had level matched before comparing, &c, the differences might have gone away, but I didn't. Sent from my BLA-L09 using Tapatalk
  9. I would be staggered if the amp didn't improve with Tesla frame grids, but it might seem a little less rich initially. You should have more space, separation, and soundstage from the start however. If it seems worse then the amp was designed around valves that don't behave like model 12ax7 should. I have tested dozens and dozens of these valves (NOS and used) and have never found a new one to be off spec. Of course it must happen but... If not, M8137 Mullards are the next choice as they are polar opposites constructionally. Bear in mind that these are end game valves for most, rare now, respected as such globally, and will only increase in value, so a relatively safe punt. Or as Rabski says, the JJ 803S for silly small money. Sent from my BLA-L09 using Tapatalk
  10. Good European NOS are the most sought after, no need to go to the USA. At (up to) your money be looking for box plate Mullard ECC83 which are rare and expensive as NOS and worth every penny if you like a rich sound. Since nobody produces their construction type elsewhere, 'bargains' on eBay are unlikely to be faked and an adequate risk on the assumption that some may be shagged, but they do last for ever... Telefunken short ribbed or long smooth plate are both excellent as are Siemens and Halske (but not later production) or indeed most Philips group valves. Pre JJ Tesla E83CC are superb, frame grid, near equivalent of the legendary Telefunken ECC803S at a small fraction of the cost, available NOS, and reliable, no need to match them just use them straight out of the box, production tolerances were fantastic and low noise to boot. Just my tuppence [emoji846] Sent from my BLA-L09 using Tapatalk
  11. People only get passionate because there's no proper science to discuss, in the absence of which there's nothing at all left to be discussed except to justify expensive decisions alreadymade which others may regard as poor choices. Of course it's inflammatory. Sent from my BLA-L09 using Tapatalk
  12. Mr Dannybgoode, not being inflammatory but how is it possible to give a cable assymetric impedance if it is just a piece of wire with terminations? Sent from my BLA-L09 using Tapatalk
  13. Jazid

    Headphone amp for high impedance headphones

    Just a heads up that I believe class D amps often have floating outputs, so 'in the unfortunate event of an internal error' there could be an unhealthy voltage around the old lugholes. Class A or A/B topology may be safer perhaps and, whatever the case, no way do you need the level of headroom shown there. Sent from my BLA-L09 using Tapatalk
  14. Jazid

    Headphone amp for high impedance headphones

    Yep, should do the trick nicely [emoji16] Sent from my BLA-L09 using Tapatalk
  15. Jazid

    Headphone amp for high impedance headphones

    Why not just drive them direct from the speaker terminals of any 10W+ solid state power amp and get rid of the jack altogether? I imagine that was how the BBC used them? In days gone by you could get stand-alone switch boxes to select between speakers and phones as an alternative... Sent from my BLA-L09 using Tapatalk