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johnwmclean

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Posts posted by johnwmclean

  1. The ultimate DIY? A Stax SRM-T2!

    in Do It Yourself

    Posted

     

    2 hours ago, starcat said:

    Indeed, way overpriced by now. In fact the almost only reason I decided to go with the RK50 is that it is still available in quad 50 ohm and 50 ohm is what the T2 was designed for.

    50k not 50ohm

    The Goldpoint V47 is an incredible attenuator, I prefer way more than DACT or RK50.

     

    • Like 1

  13. and now for something completely different part 3

    in Do It Yourself

    Posted

    9 hours ago, starcat said:

    Btw, what are the transformer covers that you are using? And what are the PCBs on the back and the one mounted on the front panel right next to the phones jack? 

    The transformer and covers both from from Antek:
    https://www.antekinc.com/ca-100-steel-cover/

    The rear panel has a diyaudio soft start circuit (blue pcb) and also amb audios ε24 power switch driver circuit/small transformer for the momentary switch on the front.

    Next to the output on the front is Kevins balanced headphone protector.  

    • Like 1

  14. and now for something completely different part 3

    in Do It Yourself

    Posted

    18 hours ago, mwl168 said:

    Care to share a few listening impressions? 

    I do need a planar... but HD800S are amazing with the CFA2. Comparative to the mini dynalo it’s more refined, open, bass has better detail and impact. I’ve not heard the HD800S sound this good, not quite as good as the SR-007 with a Carbon, but could be very content with the small compromises. 

    • Like 3

  17. goldenreference high voltage power supply (GRHV)

    in Do It Yourself

    Posted · Edited by johnwmclean

    On 6/3/2021 at 12:16 AM, jamesmking said:

    I thought I was going insane.

    Teehee...
    I was kind of thinking this was completely out of character for James.

    Meanwhile I bought some C2M1000170Ds from eBay and kind of resigned them to be fakes...

    They’re looking a bit beat up from being jumbled around, but I think the gamble paid off.

    IMG_5982.jpeg

    • Like 1

  19. goldenreference high voltage power supply (GRHV)

    in Do It Yourself

    Posted

    On 5/19/2021 at 8:04 AM, jamesmking said:

    The pin out is NOT the same...

    G3R450MT17D is G S D looking from front left to right

    C2M1000170D is G D S looking from front left to right.

    don't worry the C2M1000170D will be back in stock in a few months... maybe.... 

    I had a another look from the datasheets they are both G D S viewed from front left to right.

    Screen Shot 2021-05-31 at 9.45.03 pm.png

    Screen Shot 2021-05-31 at 9.45.11 pm.png

    • Like 1
    • Thanks 1

  20. KGSSHV Carbon Build Thread

    in Do It Yourself

    Posted

    8 minutes ago, Pars said:

    banish me to the corner :)

    I think I’m the minority here, maybe I should have some time in the corner.
    Just don’t get me started on the dot illuminated variety... 🤮

    ... to add fuel to the fire and to further rant aimlessly, I’ve rarely seen any commercial audio companies using these switches, I just can’t see the likes of Accuphase or Audio Note banging one of these bad boys on the front of their products.

    But hey this tots my personal pref, just throwing it out there :P

    • Like 3

  21. KGSSHV Carbon Build Thread

    in Do It Yourself

    Posted · Edited by johnwmclean

    I use momentary switches, they have a nice tactile feel, something like this works well:

    https://au.mouser.com/ProductDetail/Schurter/124166311120000?qs=lNltUIKtpkeBG%2Br9r7bWEA%3D%3D

    I really dislike the the tarty, latching and overused illuminated switches. So then you can use a a solo LED for the power indicator, I find it helps your amp from not looking like a door bell.

    You’ll need a driver switch circuit of some sorts with a relay, but well worth the effort.

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