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About mwl168

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  1. square wave

    Looks to me that room for heatsink is the least of the problems.
  2. Watches

    I don't know much about watch, looking for some advice here. For an entry level watch priced around $500 with automatic movement, how would you rate between Tissot, Alpina and Frederique Constant?
  3. KGSSHV Carbon Build Thread

    Another factor to consider is the build quality. The 007 and 009 are both very well built, solid headphones. The L500 and L700 look to have more plastic parts?
  4. KGSSHV Carbon Build Thread

    I don't have the L700 and never had the chance to try one either. I do have the 007 MK2.9 and it works well with both my Carbon and SRX Plus FWIW.
  5. and now for something completely different part 3

    Thanks Kevin. I posted my edit the same time you responded and I stand corrected. I got pin 5 as NC from the OP07 and OP27 datasheet but as you said, pin 5 is not NC on OPA445 and OPA551.
  6. and now for something completely different part 3

    No, take a closer look at the pic I posted; I soldered a 24AWG wire to one of the outer leg of the trimpot then plug the trimpot directly into pin 5 (NC), 6 (out), 7 (V+) of the OP socket and insert the 24AWG wire into pin 4 (V-) of the socket. The socket holds the trimpot tight and it's totally reversible.
  7. and now for something completely different part 3

    I consulted with Kevin and there is an option to replace the servo with a trimpot similar to what was done on the original Dynalo. I use a 10K trimpot (10K - 20K should work for supply rails between 24VDC - 30VDC) with the wiper wired to pin 6 of the servo OP socket and the two outer legs to V+ and V-. With no input connected, I adjusted the output DC offset to 0V and it only drifts about 3mV from cold start to fully warmed up.
  8. goldenreference low voltage power supply

    I would not recommend using 25 vac trafo for 30VDC output. The drop voltage will also vary a bit depending on current draw.
  9. and now for something completely different part 3

    Hi Kevin: Other than removing the servo from the signal path, what other benefit does this added current mirror offer? And why would the SS Dynalo need it? Isn't the servo on the various Dynalo versions already out of the signal path?
  10. The Multi Amp aka Dynalo Mk2

    I came to the states in 1985. Visit family in Taiwan from time to time. Always spend days and hours in 光華商場. Used to walk the isles of 中華商場 in the old days.
  11. and now for something completely different part 3

    I am PISSED OFF at Mouser too. Same story, placed my order last Sunday and paid extra for express shipping. Order was confirmed within a minutes or so but was not shipped till Wednesday. I have not received the order which means it'll be Monday at the earliest. This is the same thing that happened to me twice in less than 3 weeks. I called and complained last time, Mouser could not figure out what was wrong but refunded my shipping charge. At least I did receive the shipment on Saturday. This is too much to be a coincidence. Like Pars, I've always had good experience with Mouser in the past. Wonder what's up with that company.
  12. and now for something completely different part 3

    Got a shipment in and replaced the 4-pin XLR on my CFP. And, yes, it does look better to my eyes than with the black socket.
  13. KGSSHV Carbon Build Thread

    Hard to tell from the rendering the size of the heat sinks. The Carbon runs hot, make sure the heat sinks are adequate.
  14. and now for something completely different part 3

    That sounds right to me - similar experience I had first time powering up the completed board!.