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UFN

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Posts posted by UFN

  1. Part Sourcing Assistance/Advice Thread

    in Do It Yourself

    Posted

    Ran into the same problem a while ago. and found two potential solutions:

    1) There is an equivalent size (as far as I can see) with an M3-hole called the SK437 xx STS 2 from Fischer Elektronik (xx is length in mm.). However, note that only the STS 2 version has the right pin configuration for our use. Available from TME in the EU, but I haven't checked for other sources.

    2) I mounted my parts with a (nylon) M3 screw, where I trimmed the head slightly with a Dremel-type tool so it would fit between the fins of the original Aavid HS, with an M3 nut on the device side. A bit of a faff to do, but seems to work OK.

    //UFN

  2. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted · Edited by UFN

    FWIW I personally don't use teflon SPC for power because it's too stiff (no laughing in the back please :D ) but (surplus) silicone-insulated copper that's pliable and easy to work with. 18-20 ga sounds right for me (app. 0.5-0.75 mm2 in metric terms).

     

    //UFN

  11. SRX-Plus Build Thread

    in Do It Yourself

    Posted

    1 hour ago, Blueman2 said:

    mwl168,

    Any chance of going forward with the GB for just the amp?  I think some people (like myself) might go with another power supply for now. 

    Maybe take orders for the amp and the PSU separately instead? I'd at least still want a full set but I might consider adding an extra amp board - just in case. That would allow people to order amp boards only as well? Does give mwl168 some addition complexity in packing and shipping boards though.

    //UFN

  16. kgst

    in Do It Yourself

    Posted

    Yes, that's also one of the reasons I don't want to volunteer. The 25% VAT + additional duty and fees I would be asked to pay doesn't make a lot of sense to pay for the whole lot.

    //UFN

  17. kgst

    in Do It Yourself

    Posted

    Good initiative, but it might be good if we could get a more realistic cost estimate first? Spritzers $10 ballpark is just the factory FOB-price, so some estimate on what would be the final price (including shipping/import costs and a small contingency) would make it more realistic.

    If you commit to 50pcs the difference between $12 and $18 per unit suddenly matters :)

    //UFN

  18. kgst

    in Do It Yourself

    Posted

    17 hours ago, spritzer said:

    Around the 10$ mark F.O.B.  I'm sure the TKD's are around this level as well in these quantities. 

    Thanks. Even if the final price ends up being in $18-$20 range I'm pretty sure they'd go fairly quickly.

    Of course doing this is either a ton of legwork to run a GB or quite a bit of risk for someone to front the cash, buy the lot and then sell them off afterwards. Not sure if we have volunteers for either? B)

     

    //UFN

  21. Part Sourcing Assistance/Advice Thread

    in Do It Yourself

    Posted

    That was what I was thinking as well, although I can't seem to find any data sheet for a 2SC32725...

    DefQon: Not sure if you you already know, but 2SCxxxx is an NPN BJT in the Japanese system (2SAxxxx is the corresponding PNP). BCxxx in the European system is a silicon small-signal BJT, but no mention of polarity.

    //UFN

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