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Thread: New speakers and amps

  1. #2501
    Join Date: May 2011

    Location: Glasgow

    Posts: 6,804
    I'm Brian.

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    Quote Originally Posted by jandl100 View Post
    Hmm, I seem to recall there is an internal jumper.
    Just looked in the manual I got with my new DAC and it doesn't mention it at all!

    Mine came with the vc only set to adjust headphone volume, but that's fine for me with my new shitty Schiit Saga preamp.
    Yup , I remember reading somewhere that there's internal jumpers too .
    Regards
    Brian

    Sell your cleverness and buy bewilderment . (Rumi )


    Korus Computer Audio music server .
    DAC 3 French DAC
    Amplifier : Rega Brio R
    Speakers : Tannoy 637
    Interconnects : MS Audio / Klotz MC5000 .
    Speaker cables : Chord Epic Twin

  2. #2502
    Join Date: Jan 2013

    Location: Bristol

    Posts: 4,179
    I'm Justin.

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    Quote Originally Posted by jandl100 View Post
    Hmm, I seem to recall there is an internal jumper.
    Nor does mine.

    It us very easy to see what to do, though. Follow the volume pot lead to the back of the casing by the tube/solid state RCA output sockets. You will see two jumpers, one for each channel. Move both forward one pin. So they end up on pins 1 & 2, then a & b. They should be on 2 & 3, then b & c now for headphone volume control.

    I tried the Sylvania Gold Band 5670. You wanna be using a Western Electric 396A was my fairly rapid conclusion. That really is a good valve.
    "And it's lend me 10 and I'll buy you a drink. And mother wake me early in the morning."

  3. #2503
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 47,276
    I'm Grant.

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    Quote Originally Posted by jandl100 View Post
    I got a pair of Reflektor 6n3 valves arrived this afternoon Jervalves today (only need one for the 01A but they were sold in pairs).
    Anyone with one of these DACs like to try my spare one?

    Grant - did my valves turn up ok?
    Valves arrived this afternoon Jerry, thanks.. Good ginger biscuits those; i see you never left me any
    will give them a go soon.
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/EMOTIVA XPS1/12V BATTERY - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP\WE TUBED - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10, AUDIRVANA 3 PLUS, TIDAL - SMSL M6 MINIDAC - RPI/AUDIOPHONICS/VOLUMIO/5V BATTERY - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

  4. #2504
    Join Date: Jan 2008

    Location: Forest of Dean, Glos

    Posts: 10,187
    I'm Jerry.

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    Great.
    I mentioned that I had two Raytheon valves and included one in the pack I sent to you.
    I tried the one I kept in my new DAC-01A and it wasn't at all happy! Sounded faint and skewed.
    So don't worry if yours is the same.
    Jerry

    Qobuz 16/44 streaming, Topping D30 DAC with lpsu, Herron VTSP-2 valve preamp, Trigon TRE 50M monoblocks, MBL 116F speakers.

    Cables: Wireworld Starlight USB, Ixos Ixotica i/c, W&M speaker cables, Belden 19364 mains cables

    Headphones: Fostex TH600, Audeze EL-8, Wharfedale Isodynamic, Philips Fidelio X2
    Headphone amp: Rotel RX-603

  5. #2505
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 47,276
    I'm Grant.

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    Will watch it then. Try other 2 first
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/EMOTIVA XPS1/12V BATTERY - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP\WE TUBED - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10, AUDIRVANA 3 PLUS, TIDAL - SMSL M6 MINIDAC - RPI/AUDIOPHONICS/VOLUMIO/5V BATTERY - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

  6. #2506
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,345
    I'm Alan.

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    The one problem with the valve output stage is that the HT voltage is only 75V, it is regulated which is good but it really could do with being higher to get the best out of any valve. The actual voltage across the valve is only 62V which only exacerbates the problem.

    As it is only a buffer and is at a high signal level the regulation isn't necessary, so I removed it and simplified the filtering to achieve 90V across the valve.


  7. #2507
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 47,276
    I'm Grant.

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    Quote Originally Posted by Firebottle View Post
    The one problem with the valve output stage is that the HT voltage is only 75V, it is regulated which is good but it really could do with being higher to get the best out of any valve. The actual voltage across the valve is only 62V which only exacerbates the problem.

    As it is only a buffer and is at a high signal level the regulation isn't necessary, so I removed it and simplified the filtering to achieve 90V across the valve.

    Yes but your a genius . You dont have a pic of the jumper change to bring the vc into play?
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/EMOTIVA XPS1/12V BATTERY - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP\WE TUBED - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10, AUDIRVANA 3 PLUS, TIDAL - SMSL M6 MINIDAC - RPI/AUDIOPHONICS/VOLUMIO/5V BATTERY - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

  8. #2508
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,345
    I'm Alan.

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    I'll get the top off and take a pic.

  9. #2509
    Join Date: Oct 2012

    Location: The Black Country

    Posts: 4,345
    I'm Alan.

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    OK here is the pic. The jumpers are on the rear positions of the 3 pin headers, as so:



    So the jumpers are on 1-2 and a-b to give volume control on all functions.

  10. #2510
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 47,276
    I'm Grant.

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    oh, nice pic. thanks Alan...
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    OPPO BDP-103D DARBEE - JBE SERIES 3/B&O SP1/EMOTIVA XPS1/12V BATTERY - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP\WE TUBED - TWIN AVANTREE OASIS CLASS 1 BLUETOOTHS - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10, AUDIRVANA 3 PLUS, TIDAL - SMSL M6 MINIDAC - RPI/AUDIOPHONICS/VOLUMIO/5V BATTERY - FULL RANGE TWIN TELEFUNKEN/Q ACOUSTIC BT3/CANTON SUB - P.INSPIRED MAINS REGENERATED.

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