Recent content by Fred_com
  1. Fred_com

    Audeze Mobius review / impressions

    The problem is that it doesn't powercycle - holding the power button does nothing. And it doesn't get recognised at all, on other devices too.
  2. Fred_com

    Audeze Mobius review / impressions

    @KMann unfortunately, I've bricked my Mobius too on the firmware upgrade. Followed all the instructions, laid it flat on the table, and just as the process of update started, my PC BSOD'ed. Naturally, Mobius do not get recognised now, and only the red led light up when connecting to the PC. It...
  3. Fred_com

    Sennheiser GSX 1000 / 1200 Impressions

    Hey guys, for those of you, who wondered what's inside - I've just disassembled mine, here are the guts: It uses Conexant's CX20833 for DSP and CX20745 as DAC/AMP
  4. Fred_com

    HiFiMAN HM-901 visit pg 18. IMGS pg 19. NEW beta FW 1st page. . to the 901s. .new 901s FW .

      Quote: It is actually this one -   http://pinouts.ru/CellularPhones-A-N/lg_common_24p.shtml   You can find some on ebay: http://www.ebay.com/itm/Repair-Parts-Data-Charging-Port-Connector-for-LG-KE970-/321146802524?hash=item4ac5d7515c...
  5. Fred_com

    New Audeze LCD3

    Hi guys,   here are my graphs of LCD-3(c) and LCD-3(f) after driver failure repair (great service by Audeze, as always):   C   F   As I'm not good at describing the sound changes - I'd just agree with previous posters about them :)
  6. Fred_com

    EHHA Rev A - Interest Thread

    Hi tomb,   thank you for the answer.   What if there is no volume pot? Could we say that input impedance will be equal to resistor which is connected to ground at the input (grid leak resistor?, which is 1M in EHHA), if such resistor exists?
  7. Fred_com

    EHHA Rev A - Interest Thread

    Hi guys,   does anyone know what is the input impedance of EHHA rev A?   I've tried searching this thread, but found nothing.   Thanks, Fedor
  8. Fred_com

    Post pics of your builds....

    Funch, input is from a dual-mono TPA Buffalo II and IVY IV
  9. Fred_com

    Post pics of your builds....

    Thanks for the kind words guys :)   @KimLaroux,  I had to mount L-brackets to the back panel, and back feet are mounted to those brackets, so that trafos are not over-balancing the whole thing.    @kchapdaily, yes, it does sound amazing. 
  10. Fred_com

    Post pics of your builds....

    Hi all, here's my balanced Bijou (not really great casework, but considerably better than my previous attempts):              
  11. Fred_com

    Bijou All Tube Futterman Headphone Amplifier

    Well, transformer is fine then. Did you measure 6.6V with or without the load (i.e. with PS connected)?   As for measuring mosfets for shorts: make sure that capacitors on PS boards are fully discharged (wait 5 minutes after disconnecting power, or check PS output voltage with your...
  12. Fred_com

    Bijou All Tube Futterman Headphone Amplifier

    Yes, it seems that those additional poles are just for mechanical stability ( panasonic ce tha capacitor datasheet )
  13. Fred_com

    Bijou All Tube Futterman Headphone Amplifier

    Sorry for the late reply.  Let's try to troubleshoot a little:  1. Did you try to load PS with 100K 1W resistor prior to connecting amp boards? 2. What trafo are you using? Are the ratings correct? 3. Check mosfet legs for shorts, if there's any, they have to be replaced. 4. Pictures...
  14. Fred_com

    Bijou All Tube Futterman Headphone Amplifier

    Yes, mosfets are tightened with a bolt and a nut, but don't forget insulating pad and a plastic washer for bolt (like these). As for the caps - I'd cut out excess legs, insulate the pads, and use some 22 awg cable to connect to the board. And also insulate the connections between caps legs, wire...
  15. Fred_com

    Bijou All Tube Futterman Headphone Amplifier

    That is correct, C2 orientation doesn't matter.
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