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About tesla13BMW

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  • Birthday 05/10/1970

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  1. Item: JH Formula Four Parts - Antiskate Bucket and Weights, Arm Lift Bracket Price Range: $50 or depending on what you have Item Condition: New or Used Extra Info: Would like the mentioned parts or would consider an entire arm if you have one.
  2. Would you have made a template for the plinth? I have two of these (one damaged) that is on the list of projects and covid 19 is presented plenty of time although no money. At least my speakers are almost to the finishing stage and the passive pre has all the items purchased :-). The 3rd LP12 needs a lid which will have to wait.
  3. I have built a DIY SUT using Cinemag 1254's that I got from Geoff at Aurealis audio. Switchable loading of 10, 20 and 40 x (I was using a 100uV cartridge on the 40x) Don't know where you are in Brisbane but I'm in Stretton. I also use Roys PH16 which I built into an enclosure rather than using his. If you wanted to burrow the SUT for a few days you would be welcome.
  4. You could try Geoff at https://www.aurealisaudio.com.au/ He is at Arana Hills.
  5. That is a pretty plinth. If you get the opportunity to get a Tiger Paw Tranquillity I found it to be a nice improvement. Like you I've gone from a mid 80's LP12 which consequentially I have just put back together to its original form with all the old parts that were upgraded. For the upgraded deck I have stuck with the fluted linn plinth though, but, is a late large corner braced one. It has an Ekos1 with akiva, Linn T kable and Pclip, Edmunds Chans SS outer platter and his composite inner platter (later version with the ball at the end) , Tiger Paw Tranquillity, cirkus bearing, kore, new motor and Lingo3, Tangerine Audio Karmen black top plate. People poo poo Linns continual upgrades. But for me I have got to a high spec table over time that I would never be able to do in one go.
  6. And what is the advancement? Are those magnets? Has Linn adopted the Tiger Paw Tranquillity idea? Damn, I just got the Cirkus bearing a few months ago
  7. Well I don't know if I may have stumbled on a the answer to my question. And if someone can confirm that it makes sense or otherwise it would be great. So I saw this mentioned There is no fixed connection between digital level in audio files and analog (mechanical) level on record. We always set cutting level according musical content. If we know the reference level is supposed to be 5 cm/s we set to cutting level to meet this requirement. 5 cm/s is quite low for reference tone. It corresponds to -9 dB (= 16 µm peak to peak amplitude) of Neumanns reference level at 1 kHz (0 dB = 14,14 cm/s = 45 µm PP). Also found this; "The Ultimate Analogue Test LP is a milestone and very powerful reference for those truly concerned about getting the very best performance from an analog (vinyl) front end and also for those professionals who manufacture the related analog front end products. To start with, Track One very accurately provides a 1kHz tone at 7 cm/s mono (in-phase, lateral) NAB OVU standard reference level, which has been the industry standard since 1964. This supercedes the long-outdated RCA 5 cm/s (3.54 cm/s stereo) test level. Track One can also be used as an outside track wow and flutter reference as will the inner Track 10...two ways to approach this measurement. A close look shows that each track on this disc can be used in multiple ways far beyond the list provided in the limited space on the record jacket. Hats off to all of those involved in making this outstanding test LP." – Keith Herron, Herron Audio And this from the NAB standard; Reference Recorded Program Level-Monophonic 3.10 It shall be standard that the reference recorded program level shall produce the same reference deflection on a standard volume indicator (ASA Standard C16.5-1961) 2s that produced by a 1000 cps tone recorded at a peak velocity of 7 centimeters per second. Reference Recorded Program Level-Stereophonic 3.15 'It shall be standard that the reference recorded program level for each channel in its plane of modulation shall produce the same reference deflection on a standard volume indicator (ASA Standard C16.5-1961) as that produced by a 1000 cps tone recorded at a peak velocity of 5.0 centimeters per second. (Approximately 3 db below the monophonic Reference Recorded Program Level.) I read; to calibrate dBVU one uses the test record and sets the dBVU level to 0. So the 7cm/s sets the dBVU (volume scale) to 0. So using my figures, if I increase the phono level by 9dB i.e. to the 7cm/s reference I have a voltage of just over 2V. This is just over 1dB difference between cd and phono of what is going to the line stage. I don't consider 1dB would be a audible difference and I'm not hearing one. Can anyone shed more light on this? Where are all the analogue experts now
  8. So if you cannot use a CD players stated output, what can you use to investigate the gain structure of an amplification system for CD?
  9. @Telecine so I thought that all made sense. But, my CD and phono have the same speaker output when the SUT is on 10 x. However, if I go to 20 x on the SUT I get a volume lift on phono and the phono is louder than the CD. This suggests to me that both signals were not above the input sensitivity of the pre amp and negates your reason for them both sounding the same when on 10 x. I am still confused how the 2.3V from the CD sounds the same loudness as the 0.7V calculated for phono. I wish @Zaphod Beeblebrox was still here as he seemed to explain these types of questions.
  10. I don't seem to have volume control, but, do have digital input. There is a toggle switch that allows switching between cd and the digital input.
  11. @Telecine I can't find an input sensibility figure either. So am I right from what you are saying that if the input sensibility is say 0.5V that the output from the line stage would be the same because the input signal is such that both sources will be driving the line stage to full output and the volume control will be attenuating both sources equally? If such what stops the cd input being so much greater from severely clipping? Excuse me if this seems a stupid question.
  12. @Cafad just looked at the manual and the picture of remote shows + and - volume. Just had a play and the consonance remote supplied with the cd player does not alter the volume. Thought we were onto something there.
  13. So I have swapped where the phono and CD go into the pre amp and can confirm playing the same album (Pink Floyd - Wish You Were Here) and having them seamlessly aligned, that there is no discernible difference in output level from the speakers. Note: this is brilliant for me and it is a great situation to be in compared to many who find CD is "hot". But, what I don't understand is from reading the spec's of the CD and my calculations as to why this is so. My conclusion is that assuming the cartridge spec, SUT windings and phonostage gain are all true to my calculations, that the CD player must be outputting near as damn it the same i.e. ~700mV.
  14. @Cafad my droplet 5 has no variable output and there is no mention in the user manual of adjusting volume. But, what you are suggesting would be the opposite of what I am finding. Calculated phono output stage voltage is considerably less than the 2.3 VRMS that the droplet 5 says is its output, yet, it plays at similar volume to the phono at the same volume control position on the pre amp. @muon*The only difference is that my phono stage goes into the direct input of the Audio Research LS2 while the cd goes into Cd. Looking at the schematic this arrangement is nothing more than a SPDT switch selecting the input selector switch or the direct input. Perhaps the selector switch is "dirty" and dropping voltage across it and I will look into this over the weekend by swapping the cd to direct and phono to the input switch.
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