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Thread: Nytech CTA 252 XD Playing in MONO

  1. #11
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 4,649
    I'm Dan.

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    Quote Originally Posted by Scooby View Post
    Not sure how Nytech are configured, but might it be the Din cable being used is the wrong pin configuration?
    Hi Andy

    Could be i'm in the process of talking to Phil Ballam and hope we can work out the fault..

    Thank you
    Dan
    Main Rig
    Tisbury Passive Pre Amplifier & Linn LK85 Power Amplifier & Linn Tukan Speakers & QED Speaker Cable & Cable Talk & Linn Interconnects , Marantz CD 67 OSE CD Player
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  2. #12
    Join Date: Feb 2013

    Location: W Lothian

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    I'm Grant.

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    Quote Originally Posted by dantheman91 View Post
    Hi James

    I seem to think its outputting for Right hand channel only but coming out of both speakers which is awfully strange both left and right channels are producing sound but its wired to right only as when i move the balance to the right it follows the speaker but when i move it to left it stays the same its complex for me to describe but hopefully i'm making it clear..

    Please let me know if this is helping..
    could be wiring is wrong..
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
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  3. #13
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 4,649
    I'm Dan.

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    Hi Guys

    If this helps -

    Just tried L&R - Left disconnected from CD player sound still in both speakers balance in the middle - Right Disconnected sound still in both speakers balance in the middle - when altered to the left to right it goes silent so the channels are their

    Something still a miss though..
    Main Rig
    Tisbury Passive Pre Amplifier & Linn LK85 Power Amplifier & Linn Tukan Speakers & QED Speaker Cable & Cable Talk & Linn Interconnects , Marantz CD 67 OSE CD Player
    Vinyl :
    Rega Planar 2 / RB250 / Ortofon OM Super 10 / VDH Oil Bearing Upgrade / Roksan R Mat

    Second System / Late Night Radio :
    Aiwa A30 Amplifier & R30 Tuner - Celestion A1 Compact Speakers & Pioneer PD 203 CD Player

  4. #14
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 4,649
    I'm Dan.

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    Help from PFM i have tried a different DIN in the preamp section and this confirms their is output to both left and right channels under light touch on the pins.
    Main Rig
    Tisbury Passive Pre Amplifier & Linn LK85 Power Amplifier & Linn Tukan Speakers & QED Speaker Cable & Cable Talk & Linn Interconnects , Marantz CD 67 OSE CD Player
    Vinyl :
    Rega Planar 2 / RB250 / Ortofon OM Super 10 / VDH Oil Bearing Upgrade / Roksan R Mat

    Second System / Late Night Radio :
    Aiwa A30 Amplifier & R30 Tuner - Celestion A1 Compact Speakers & Pioneer PD 203 CD Player

  5. #15
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 2,442
    I'm Lawrence.

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    Interesting history here, it says they were often used in an active setup driving HF/LF on one channel, I wonder if that is achieved with the mono button or an external/internal switch/link.

    https://zstereo.co.uk/2013/10/28/nytech-cta252/


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  6. #16
    Join Date: Apr 2012

    Location: London

    Posts: 489
    I'm James.

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    Quote Originally Posted by dantheman91 View Post
    Help from PFM i have tried a different DIN in the preamp section and this confirms their is output to both left and right channels under light touch on the pins.
    I don't know the Nytech circuit so could be talking rubbish but it looks to me like there's a fault at the mono/stereo switch (if there is one). Both channels seem to be working and appear to be being summed. That's going to happen after a gain/buffer stage I'd suspect. If I'm correct and there's a tape out then that might still be working in stereo if you can try it? If not it takes the fault to even earlier in the circuit.

    Either its been hard wired for mono - might have been done many moons ago - or it might be a failed mono switch or shorted pin on it. It should be easy to check if you can get it open. At least both channels are working!

  7. #17
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 4,649
    I'm Dan.

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    Hi James

    Thanks for the Info - i have been quoted 300 by nytech for a full service but i just want to see if it can be converted to stereo are their any kind hearted souls on here willing to take a look for me?

  8. #18
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 4,649
    I'm Dan.

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    Just taken it In for repair with a local repair company.
    Main Rig
    Tisbury Passive Pre Amplifier & Linn LK85 Power Amplifier & Linn Tukan Speakers & QED Speaker Cable & Cable Talk & Linn Interconnects , Marantz CD 67 OSE CD Player
    Vinyl :
    Rega Planar 2 / RB250 / Ortofon OM Super 10 / VDH Oil Bearing Upgrade / Roksan R Mat

    Second System / Late Night Radio :
    Aiwa A30 Amplifier & R30 Tuner - Celestion A1 Compact Speakers & Pioneer PD 203 CD Player

  9. #19
    Join Date: Sep 2009

    Location: Bournemouth

    Posts: 4,649
    I'm Dan.

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    It a Pre amplifier Board Fault but guy said like looking for Needle in a Haystack someones been in their in the past..

    Any Back up Ideas - I know nytech do new boards at 50 - I already have 100 all in on this already do i put it to one side or get another another opinion?
    Main Rig
    Tisbury Passive Pre Amplifier & Linn LK85 Power Amplifier & Linn Tukan Speakers & QED Speaker Cable & Cable Talk & Linn Interconnects , Marantz CD 67 OSE CD Player
    Vinyl :
    Rega Planar 2 / RB250 / Ortofon OM Super 10 / VDH Oil Bearing Upgrade / Roksan R Mat

    Second System / Late Night Radio :
    Aiwa A30 Amplifier & R30 Tuner - Celestion A1 Compact Speakers & Pioneer PD 203 CD Player

  10. #20
    Join Date: Dec 2018

    Location: Cornwall

    Posts: 123
    I'm Dave.

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    Its a good amp and the repair costs wont buy much of a replacement, i'd get it repaired if you've been happy with it.
    Amp Yamaha A-S500
    CDP Denon DCD 520
    Tuner Cambridge Audio T500
    Music Player Pioneer N30 Network Player
    DAC Beresford SEG
    PSU Linear 15v/Baresford Dorado
    Speakers Dali Zensor 3s
    Speaker Cable Fisual S-Flex Studio 2.5mm / Ortofon SPK 100
    Stands Audio Visual Twin Pillar
    Interconnects Van Damme Silver Plated OFC Pro Classic XKE & Klotz MC5000 Dac To Amp
    Headphones AKG K550 mk3
    SUB BK XLS 200

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