Recent content by yzriver
  1. yzriver

    My DIY Fullrange Speakers

    Can these speakers with FE126/127 be used as near field listening, for example, on a desk? The sound of a pair of monitors is a little boring for me, compared to my Paradigm speakers, so I would like to try the sound rendered by some music speakers.
  2. yzriver

    SOHA II Builders Thread

    I finished my case prototype of the SOHA-DAC combo. I know the cutting and wiring is shameful, but they are work well now. Next step is to find some good board and redo the wire. There are two LED that indicate the source is coaxial-DAC or RCA line in. Now source is DAC. On the top the...
  3. yzriver

    SOHA II Builders Thread

    I had a similiar problem as regal has. The LM337 back matal is Vin pin, and the heatsink is to ground from its leg. You need a sleeve to isolate the screw/net to the heatsink. Try the LM337 without heatsink first.
  4. yzriver

    SOHA II Builders Thread

    Quote: Originally Posted by rds That is possible I guess. But if an "amp" has unity gain then technically it's not an "amp", but a buffer instead. My understanding is that a pre-amp attenuates the signal before it is fed to an amplifier. Hopefully someone more knowledgeable will answer...
  5. yzriver

    SOHA II Builders Thread

    Quote: Originally Posted by rds You can of course, but do you want a pre-amp with a gain of 10+? My understanding is that pre-amps are usually unity gain. The power amp is unit gain, and preamp has some gain. Am I wrong?
  6. yzriver

    SOHA II Builders Thread

    Ask this question again. If it works, I can save money for a preamp and space. Can I use SOHA as a preamp? I have a Adcom GFA-5300 power amplifier, of which input impedance 47KOhm, sensitivity 0.1V for 1W and 0.9V for 80W. Thanks.
  7. yzriver

    SOHA II Builders Thread

    Can I use SOHA as a preamp? I have a Adcom GFA-5300 power amplifier, of which input impedance 47KOhm, sensitivity 0.1V for 1W and 0.9V for 80W. Thanks.
  8. yzriver

    SOHA II Builders Thread

    JamesL It maynot relate to your problem, I just want to let you know you need to be awared of the connector for headphone. You soldered the screwconnector pin to the center 3 hole, of which lable is L,G, R, but the headphone from tips to sleeve are left/right and grond. I maynot explain well...
  9. yzriver

    SOHA II Builders Thread

    I am building a SOHAII. It started to sing at last weekend, with a very clean, warm, very detailed sounds. The tubes are RCA 12AU7. The tested voltage: TB+ 92.2 TB+L 75.2, TPL 56.3 TB+R 74.9, TPR 56.4 The audio source is a DAC board, which works with DIR9001 and PCM1793. It uses a 1875 to...
  10. yzriver

    Gamma-2 (γ2) DAC Thread

    allright, how about make a gamma 3.
  11. yzriver

    Gamma-2 (γ2) DAC Thread

    For me, I like the gamma 2 integrating receiver and DAC in one board, but it would better to have seperated buffer stage or interconnection to outboard buffer.
  12. yzriver

    Gamma-2 (γ2) DAC Thread

    how gamma 2 compares to twistpearaudio's DAC? Is it reasonable to have two differential output from gamma 2? thanks
  13. yzriver

    Anyone has used SONY CDP-610ES

    I got a SONY CDP-610 from a local yard sale, by $20. This machine was built like a rock, weighting about 20lbs. It was made at 1983. I guess at that time a CD player is a high end machine, so the componets inside are very awesome. I am not a audiophiler, so I can't describe how good it sounds...
  14. yzriver

    SOHA II Builders Thread

    thanks runeight. Does a 2x18V transformer work for SOHA II?
  15. yzriver

    SOHA II Builders Thread

    Is it possible to use SOHA II as a power amplifier to a pair of speakers, for example, those sensitive fostex full spectrum speakers. It looks the SOHA II has a few watt output capabilities.
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