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judo

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Posts posted by judo

  1. On 5/20/2020 at 9:55 PM, mwl168 said:

    The latest FedEx tracking shows our boards are "in transit" in Japan :palm:

    I don't know if to laugh or cry! 

    About FedEx: I told earlier FedEx here is nice. Ordered from Mouser on Monday 14:30 CET and got the package now 12:30 CET Wednesday from Texas. As you know the mini T2, etc. boards have been coming for more than two months (by USPS) 😕

  2. 1 hour ago, Discom said:

    I've not received them yet either. I suspect they are stuck in customs. Either that or the local post dropped them off at a pickup point, forgot to tell me about it, and happily shipped them back after a week, which has happened before. Or they've disappeared...

    Yes, these are the options about here(Hungary). Not usual to lose something but the times are not usual too.

     

    12 minutes ago, MLA said:

    Mine just cleared customs...

    So there was some delay we will see. Thanks for the answers!

  3. One of my first Fedex shipping came from Viet Nam and went back and forth to China two times and after that to a lots of arabian country I was amazed I thought this was the Fedex way. After that something little from Amb went back and forth on the Los Angeles San Francisco line for a month but that was UPS so this is not exlusively Fedex method. Viet Nam would be the connecton ? :)  Here Fedex is nice they bring my Mouser orders.

  4. 1 minute ago, Pars said:

    Interesting. Where you have the temp probe was always the hottest area when I was using an IR gun. Maybe a bit further left. Any reason you didn't populate the rail caps (above the right heatsink)?

    a long story :) They were popped and  I always  forget to order them.

  5. To the heat issue:
    I have a "standard" mini from the first group buys. Case, the unfortunate 3 oz board, 402 led resistor, 255 bias resistor, 15 mA bias. I used it with offboard regulators and without the top cover mainly for a time. Now I squeezed in the onboard regs second times a bit better with the same heatsinks but only with open lid. I would not like to reduce the bias so I experimented with @Skooby's resolution(see in this thread) a little. In my version there is almost 10 mm the distance from the transistors's heatsinks to the lid so I made a "heat bridge" from two 5 mm thick aluminium pieces as you see in the picture. The result is more than I hoped. Measuring the temp on the heatsink hotter side:  with the top cover 85-86C; without the cover 70C. With the "heat bridge" and the cover 63C. The absolute temperature is depends on the ambient, the music, the headphones a bit but the more than 20C gain is stable. This was a surprise to me, the mod is easy maybe helps somebody. You can secure it with screws, widen it etc.. Maybe later. It is stabil mechanically I am happy with it as is. Thanks for Skooby!

    The temperatures were measured after cc. 90-120 minutes when they were stable.

    IMG_20200414_152345.thumb.jpg.f6d520e35863972ab6cd7fb6916c8a43.jpg

    IMG_20200414_152509.jpg

    IMG_20200414_152735.jpg

  6. I did not see Amb's board but some of the available little tps boards have enable pin.  The fix can use them(or the mini GRLVs ? :) ) too paralell with the onboard regs maybe .  You can replace the Amb's and use them for other purpose.  Brainstorming for the cost of somebody else I know.

     

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