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mwl168

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Posts posted by mwl168

  3. DIY mini T2 Build Thread

    in Do It Yourself

    Posted · Edited by mwl168

    To date I've soldered all the SMD applications using a fine-tip soldering iron and a fine tip tweezer. I also find using very small gauge solder is key - I use .02"/3mm diameter solder from Kester with 2% silver and it works great. You can get a small tube of this solder from Mouser offered by NTE. I can try dig out the part number if you are interested.

    I want to experiment with a hot air station but have not done so yet. Mostly because I could to decide how much to spend and which one to get. Even the very basic one from the trusted brand (JBC, Hakko, etc.) costs an arm and a leg. 

    • Like 1

  4. Interested in getting started with DIY builds, don't know where to start

    in Do It Yourself

    Posted

    One thing I recommend is to watch a few of Youtube videos on soldering technics if you have not already done so. Pace put on a few videos that I like very much.

    Electrostatic amps like the Carbon operate on very high voltages which makes them rather unforgiving with less than tedious soldering job. In many threads here you will find information about cleaning solder flux, etc. that are good practice to follow. 

    I would further recommend getting good quality soldering station and solder. It’s very good investment for serious DIYers.
     




     

  5. The Headcase Stax thread

    in Headphones

    Posted

    This can end very badly!

    You are dealing with very high, unforgiving voltage here, a small misstep can easily turn into a catastrophic disaster. 

    I advise you to consider if you are willing and prepared to deal with such consequence before you continue to proceed down this path.  

    • Like 1

  6. The Headcase Stax thread

    in Headphones

    Posted

    Agree that measuring an amplifier with a device in a store isn’t practical.

    Assuming the ultimate goal here is to find an amp that you like the sound the most, I would pick one or two good recordings that I am very familiar with, keeping the front end and headphone consistent and simply listen to the different amps at the volume you like and as consistent as you can sense and go back and forth as needed. Then go with the one you like the most overall.

    Make sure the front end and amps are properly warmed up when you do this.

    • Like 1

  7. KG Balanced Dynahi build discussion thread

    in Do It Yourself

    Posted · Edited by mwl168

    I tie the ground of the PSU together when I do a dual mono amp - one wire that goes from the output ground of one PSU to that of the the other one and then, from there, a single wire to the chassis. I do the same thing when tying the LV and HV PSU ground together. So far this has worked well for me.  But I typically do not install a volume pot on my headphone amps. 

  8. The analog thread.

    in Home Source Components

    Posted

    14 hours ago, luvdunhill said:

    It’s fun getting to know a new setup. I don’t have the VPI really dialed in yet, but already don’t like the threaded clamp. I am trying just a heavier weight that places over the threaded spindle. I also don’t know why VPI didn’t better match up these foam discs when adapting their newest footers to older designs. I think I will have a go at designing a replacement.

     

     

     

    I am curious - what don't you like about the threaded clamp? 

    I like mine on the TNT, it does a good job coupling the record to the platter and works well if the record is very mildly warped. 

    For more severely warped record, I use a peripheral ring and a heavy brass center weight (have to take the washer off the spindle that works with the threaded clamp).  

    I do stop the platter when I change record. 

  13. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted · Edited by mwl168

    Matching P channel and N channel is very challenging even you have a large supply of both. Agree with Pars that it's not really required for this application. 

    If you already use dip socket for the THAT340 you can simply plug in the SK170/SJ74 into the dip socket with some leg bending. There should be some photos showing how this is done in the Balanced Dynahi build thread. 

    found the photo so I'll show it here...

     

    JFET replacing THAT340.JPG

    • Like 2
    • Thanks 1

  16. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted · Edited by mwl168

    The balanced amp gives twice the voltage swing and slew rate and 4 times the output power. Wether that matters for a headphone like HD650 is debatable. My personal opinion is yes.

    The motto here at HC is "moar is better" and never pass a chance to go overkill >:D

     

    • Like 2
    • Haha 1

  17. Part Sourcing Assistance/Advice Thread

    in Do It Yourself

    Posted · Edited by mwl168

    6 hours ago, kevin gilmore said:

    suitable replacements seem to be 2sa1552 / 2sc4027

    toshiba tta004b / ttc004b also look compatible

    I bought a bunch of tta004b/ttc004b for this exact purpose but have not tried them yet. 

    Would be nice if we can find something that's also pin-compatible with 2SK216/2SJ79.

  18. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted · Edited by mwl168

    6 hours ago, jbozek said:

    biggest reason is cost. i am a student so cost is a problem. second reason, i wanted a somewhat small and compact all in one. maybe in the future i will make a balanced version

    I see now that I missed it - I thought you built a SUSY Dynalo and only used one phase of the balanced output. I see now it's actually a single-ended Dynalo. Did you follow Kevin's original Dynalo schematic from many years ago? 

     

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