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About ophool

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  1. To use volume control on the Pi you need to enable the software mixer as per https://volumio.github.io/docs/User_Manual/Volume_Control_and_audio_quality.html After checking your DAC specs, it might seem simplest to use the single ended outputs which halve the voltage out of the balanced connections.
  2. Reading this I took pics to be (numbering from top down) 1 & 4 the EH 6CA7, 2 & 3 the Sovtek 5881/6L6WGC
  3. Not an assumption I would be prepared to make given the wide variety of valve types and pinouts using the octal arrangement. Using a pentode in place of a rectifier (or vice versa) might create more excitement than would be wanted. Even amongst the pentodes, checking the list of substitutes for the 6L6 shows many having varying pinouts which would therefore not be "drop in" replacements. From what I can find, a 5881 is a pentode that should have 7 connected pins as also is the 6L6, the EL34 is also a pentode having 7 connected pins so the missing one on your Mullards is fine. 6 pins on a 5881 does not compute.
  4. Hi, I would suggest the Jelco HS-25 as being a good match for the cartridge and arm. It is virtually equivalent to what I have my DL-110 mounted on and that has seen service on an SL1200 and several other arms also.
  5. I went from the DL-110 to the DL-103, initially using it with an MM phono stage and a SUT. The SUT was a Denon intended for use with the DL-103. While I liked the 103 I thought it a little coarse, particularly on classical music, so I purchased a DL-301 II and was happy with that for a number of years. I did replace the SUT with an active headamp and found that that improved the 103 significantly over the SUT. When I eventually sent the 301 for a rebuild, I had the late Duc fit one of his wooden bodies to the 103 and found that that plus a change to 1Kohm load really had the 103 singing. Most of the time these were used on a Michell Tecnoarm. Dependent on what arm you are using, the 301 with its higher compliance may be a better fit for you. On the Tecnoarm, prior to fitting the wooden body, I used a lead shim to add approximately 5gm extra mass with the 103, the 301 I ran as supplied, although I thought it a little better when loaded with around 212 Ohms. I have no experience of the 103R or other variants of the 103 and the 304 has quite a low output. Afterthought, the 103 series, including the R variant, are fairly low compliance and will usually sound better after playing one or two sides to warm up the suspension. This is regardless of any break-in from new.
  6. ASIO and USB are not mutually exclusive - see this panel from my system If you select the driver for a device that is not connected Foobar will usually timeout. A USB DAC driver will not drive your soundcard anymore than it will drive a scanner or printer. Why not connect the DAC by USB and save all this grief ?
  7. If the DAC is not connected by USB the computer does not "see" it and drivers are not required. (nor will they do anything) It is just the same as if you connected a CD player to the DAC by SP/DIF. If you see ASIO drivers for your soundcard in Foobar then select them, selection of Digital output will be in the Asus control panel or windows sound settings. If you cannot find Windows 10 ASIO drivers you may be able to use Windows 8 drivers in compatability mode.
  8. I would not say that a clamp or puck were necessary, but, IME the combination of one with various different mats may provide changes to your perception of various replay characteristics. They provided me an opportunity for trying various combinations until I found myself with a combination that satisfied my tastes. Their effect will also depend on what the deck is placed upon for support. On my modified P2 with GT platter and sub platter and SRM "silent base" I found the combination of a Funk Achromat and a Bren1 puck gave the result I was most satisfied with and I used that combination for many years. If the puck is placed gently on the record such that there is no shock load on the bearing there need be no concern on that account. You may find it interesting and instructive to experiment for yourself, I certainly did. I would also note that I do not follow RG's advice to allow the stylus to clean my records, not all his pronouncements need be read as gospel.
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