cre009

Wammer
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About cre009

  • Rank
    Wammer
  • Birthday Private

Personal Info

  • Location
    UK Bristol

Wigwam Info

  • Turn Table
    LP12, 301, XA + 14
  • Tone Arm & Cartridge
    many
  • SUT / Phono Stage
    Kinshaw + 3 others
  • Digital Source 1
    Linn Mimik
  • Pre-Amp
    Kinshaw Perception
  • Power Amp/s
    Lumley Reference ST4
  • My Speakers
    Heybrook HB1
  • Trade Status
    I am not in the Hi-Fi trade

Recent Profile Visitors

197 profile views
  1. cre009

    HMV going into administration

    My understanding is the remaining Fopp outlets are part of HMV so will be interested if those are also involved.
  2. cre009

    2019 £500 Turntable Challenge

    Thanks for the picture. I will probably need to get one of the decks to fully visualise the operation. Loads of different approaches to engineering which is what make TTs so interesting.
  3. cre009

    2019 £500 Turntable Challenge

    Attached is the HFC review of the Systemdek IV where the use of "hanging coil springs" is described for this deck and also used for the IIX. Also a HFN review of the IIX which says positive things about the arrangement. For the purpose of levelling some compression must be applied to decks such as the AR XA, Linn LP12, Heybrook TT2, TD150 and original Systemdek Transcription. I have all of them in my collection. For these decks the platter/sub chassis effectively bounces on the springs. For the Systemdek Transcription very compliant springs were used to increase the level of compression to prevent lateral movement. On the LP12 and TT2 the springs are stiffer to avoid that movement. For TD150 and XA sponge is inserted to stiffen the springs. I have never owned the later Systemdeks or PTs but I understand the sub chassis hangs from the springs. Uzzy claims this is superior but I have no experience to understand if that is the case rather than just being different. I assume some kind of compression adjustment must still be applied for the purpose of levelling.
  4. cre009

    My Latest Purchase

    In the patent hearing Hamish Robertson conceded that the RD11 was based on a prototype turntable developed at Castle by Ivor Tiefenbrun. All the development was done at Castle with plinths and dustcovers etc externally sourced.
  5. cre009

    My Latest Purchase

    Not been able to verify it either way but I have seen it suggested that the very original batch of Castle build RD11 plinths may also have been Goldring sourced. Subsequent Dunlop-Westayr RD11 plinths were sourced from Victor Hallam of Derbyshire and LP12 plinths were apparently from Greaves of Sheffield.
  6. Warm and cuddly was part of it - in reality evaluate the "bass bloom". I wanted an 80's type deck at around the same standard as my original LP12 purchase prior to upgrades for comparison purposes. Also it was about the only way to do it quite cheap as a learning experience given that I already had some components available to me including a plinth.
  7. Thanks - I have a Cirkus bearing on my higher spec deck but my second deck is a bitsa I built myself where I specifically wanted pre Cirkus/Valhalla for a variety of reasons. I also have a couple of spares associated with a DIY project I am undertaking.
  8. cre009

    DIY Turntable?

    Have a look at the Peter Moncrieff piece I linked early on in the thread. He details a series of belt interactions that may at a very minute level impact on sound quality. How many of the things he describes will actually have an impact is open to question but it is stuff that requires consideration. For suspended decks if the belt interaction causes even a faint movement not visible to the eye it may impact quality despite the flywheel effect. The arm will also move with the platter which opens the possibility of causing minute interference with the stylus tracing the grooves. http://www.stefanopasini.it/Audio_Moncrieff.htm I actually like suspended decks and I am clear that the use of a suspension can have benefits for other reasons but there are some trade offs. The nature of the suspension allows all sorts of options. Linn LP12s use stiff springs in a compressed state to prevent lateral movement. The Systemdek Transcription uses very compliant springs that are much more compressed to try to avoid that lateral movement. The Fons CQ30 uses springs compressed to the point where it is questionable they are even useful. I know elsewhere you have been advocating the use of springs in a stretched state as superior but are those likely to have more or less lateral movement? https://www.vinylengine.com/turntable_forum/viewtopic.php?t=1432
  9. Out of curiosity what are the indicators of "hardening errors on the thrust pad" that you can tell if you have a bad one?
  10. cre009

    DIY Turntable?

    Not convinced that the Systemdek is that good a candidate for DIY because they don't come up for sale sufficiently often as repair or spares that they can provide a good source of parts though they are often to be had quite cheap when they do show up. On mine the Nextel paint is a bit shabby but still ok. Don't see much point in splitting up a good deck which would be better being refurbished. As you say they are nice enough decks which were a Linn competitor in the early 80's. Mine gives a wide soundstage with quite pronounced bass with the arms I have tried. I currently have a Manticore Musician on mine which as a combo I rate about the same as my second LP12 when I had a Basik Plus on it. I now have a Ittok on that LP12 which gave a much bigger improvement than when I tried my Zeta on the Systemdek. Not tried the Ittok on the Systemdek yet. With regards to the merits of different drives there are all sorts of options which is why the topic is so interesting. Any kind of DIY alternative will probably require compromises and tweaking.The wording I quoted is from an ebay ad which I put up for discussion because it was relevant to the arguments being made. The issue for me appears to be around how the belt interacts with pulley and whether motor vibrations could result in any extra minute lateral movements with belt pulling on platters. A quieter motor should be better regardless if all else were equal.
  11. That seems plausible. Between that and balancing there seems to be reasons why clocking the platter could change things. I had a look at a couple of my other decks. The Systemdek Transcription has 3 small circular chunks taken out of the underside similar to the TD150. The Heybrook TT2 does not have any signs of balancing so like Linn is probably relying on the accuracy of the casting. I would guess all my decks with outer platters could potentially benefit so quite a bit of work to investigate.
  12. It is possible that the stylus jumping situation is down to resonance where the frequency of the turntable "bounce" coincides with the frequency of bounce for the location on which the turntable is placed. This occurs quite a bit for sprung turntables of different makes. Either adjust the springs on the turntable so the bounce no longer coincides (may no longer align with plinth) or relocate the turntable or try to dampen the natural bounce associated with the sideboard location. https://en.wikipedia.org/wiki/Mechanical_resonance
  13. Balancing may be a factor depending on the manufacturing quality of the Linn platters and whether they are inherently balanced. AR XA's were definitely balanced using a weight. http://audiokarma.org/forums/index.php?threads/ar-xa-platter-balanced-with-lead-weight.755718/ My TD150 has small circular pieces taken off the underside of the platter on one edge that may be there for purpose of balancing. No obvious reason for them otherwise.
  14. I would suggest trying to rule out possible issues with contact points at both cartridge and phono rca's. Check the channel with the issue has good contact at the cartridge for both live and ground ie the tags for the channel are a snug fit and no obvious issue with solder joints such as wires fraying. Similarly with the RCA leads check that the plug is well soldered with no fraying or anything that may give an intermittent contact. If it is not easy to get into the RCA plug without cutting then try holding the rca lead while plugged into the phono and see if the noise happens while you are holding it and if you move the wire.
  15. ThomasOK - something I will have an experiment with to establish if I can hear any change - I have a couple of LP12s of different builds to try it on. I observe that Linn don't do anything extra to balance the platters. On my AR XA's there is a small weight attached to the inside of the outer platters to balance them in much the same kind of way that car wheels/tyres are balanced.