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Thread: Blind phono stage & amp; Capacitor testing

  1. #51
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    I will add that Burson and Sparkylabs have kindly sent us some discrete opamps to try in the new circuit so you can expect a write up about how they fare!!

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    Technics SP10 MK2 > Phonomac AT-1010 tonearm > ZYX R50 Bloom cartridge > Jolida JD9 MKII > Firebottle Monoblocks > Creek OBH-11SE Headphone Amp > IXOS Speaker Cables > Pioneer CS-77A Speakers

  2. #52
    Join Date: Jan 2013

    Location: Birmingham

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    I'm James.

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    What issues are you having with the op amps-noisy?

    Good to hear the project is still ongoing.
    VPI Scout 1.1 / JMW 9T Tonearm / 2M Black /Croft 25R+ / Croft 7 / Spendor SP2

  3. #53
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    Quote Originally Posted by Jimbo View Post
    What issues are you having with the op amps-noisy?

    Good to hear the project is still ongoing.
    Yes mate, cant use the discrete op ams in the first stage (Gain) due to noise but there is another issue with the offeset voltage (?) And something to do with rails. Alan has identified the issues and has a way around it but that involves redesigning the circuit. The hope was that the PCB freely available could be manipulated into doing what we want but its proving to be difficult.

    What we have found from testing and listening (no science yet) is that the MK2 prototype was blacker than black when we used the opamp that came with the board. This was used solely for gain and that was very encouraging.

    I honestly believe that​ when the wrinkles have been ironed out, this will outperform a lot of contenders. Trouble is, it needs to get there first!

    Sent from my EVA-L09 using Tapatalk
    Technics SP10 MK2 > Phonomac AT-1010 tonearm > ZYX R50 Bloom cartridge > Jolida JD9 MKII > Firebottle Monoblocks > Creek OBH-11SE Headphone Amp > IXOS Speaker Cables > Pioneer CS-77A Speakers

  4. #54
    Join Date: Feb 2010

    Location: Berkshire, UK

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    I'm Tom.

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    Ahem keen to hear more about that Nighthawk, all that adjustability is right up my street, I must look out for one to have a play with
    Speakers - 'RFC' Tannoy Canterburys with custom crossovers; Amp - Radford STA100; Preamp - EAR 912; Vinyl: Thorens TD124 MkII with Ikeda IT345-CR1 and Ortofon 309 Limited tonearms; Cartridges: Miyajima Madake, Zero Mono 0.7 and Premium 1.0 retipped by Ana Mighty Sound with bamboo cantilever, Ortofon SPU Royal N and Shure M3D with Jico stylus; phono stage and SUT from EAR 912; Esoteric Sound Re-Equalizer for equalisation of early mono and 78; Digital: Audio Note CDT2/II transport.

    'Wer nicht liebt Wein, Weib und Gesang der ist ein Narr sein Leben lang.'

  5. #55
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    Quote Originally Posted by montesquieu View Post
    Ahem keen to hear more about that Nighthawk, all that adjustability is right up my street, I must look out for one to have a play with
    There was one on ebay very recently at about 500(?) I really liked it but to me it sounded a bit compressed to my ears. Pitch black background though which is admirable. And the build quality was quite superb.

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  6. #56
    Join Date: Oct 2012

    Location: The Black Country

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    I'm Alan.

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    The Nighthawk is a very elegant design, no coupling capacitors in line although here is one electrolytic in the feedback network, so will have some (probably small) influence on the sound.
    I think the biggest drawback is that it uses feedback RIAA equalisation, which in most people's opinion, that have heard the difference, results in a slightly compressed or 'sat on' type of sound delivery.

    The one overriding quality is that it is VERY quiet

  7. #57
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    Quote Originally Posted by Firebottle View Post
    The Nighthawk is a very elegant design, no coupling capacitors in line although here is one electrolytic in the feedback network, so will have some (probably small) influence on the sound.
    I think the biggest drawback is that it uses feedback RIAA equalisation, which in most people's opinion, that have heard the difference, results in a slightly compressed or 'sat on' type of sound delivery.

    The one overriding quality is that it is VERY quiet
    I'm not sure I would buy one though. The idea in principle of having all the options available on the front panel is very useful. It didnt offer the space and sparkle of the other phono stages we listened to.

    It did sound "sat on" thats a very good description.

    Sent from my EVA-L09 using Tapatalk
    Technics SP10 MK2 > Phonomac AT-1010 tonearm > ZYX R50 Bloom cartridge > Jolida JD9 MKII > Firebottle Monoblocks > Creek OBH-11SE Headphone Amp > IXOS Speaker Cables > Pioneer CS-77A Speakers

  8. #58
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    Look at this on eBay http://www.ebay.co.uk/itm/132225828599

    Click the link, Tom 😉👍

    Sent from my EVA-L09 using Tapatalk
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  9. #59
    Join Date: Apr 2012

    Location: Southall, West London

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    I'm Geoff.

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    Quote Originally Posted by Bigman80 View Post
    Look at this on eBay http://www.ebay.co.uk/itm/132225828599

    Click the link, Tom ����

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    He prefers it to the EAR 834P. Not surprised, the 834P is nothing marvellous.
    Mr. Tact!

    Main system: MMs/ADCs/Low output MC's/One rare Japanese SUT/One scarce British phono stage/various tonearms/hefty Japanese DD TT and hefty Japanese BD TT and small British BD TT. 4 CD players/2 jitter buster/2 DACs/Valve buffer. TVC stepped attenuator or valve pre-amp or solid state pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/Two way British compacts and full range speakers, amongst others. And too much more to list!

  10. #60
    Join Date: Nov 2015

    Location: Wolverhampton

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    I'm Oliver.

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    Ive not heard one in all fairness. I dont think 580 is a great price either, although they can go for more. Its hype. its called the "Giant Killer" All I will say is it got murdered in the blind test by the OTP.

    Sent from my EVA-L09 using Tapatalk
    Technics SP10 MK2 > Phonomac AT-1010 tonearm > ZYX R50 Bloom cartridge > Jolida JD9 MKII > Firebottle Monoblocks > Creek OBH-11SE Headphone Amp > IXOS Speaker Cables > Pioneer CS-77A Speakers

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