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MASantos

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Posts posted by MASantos

  4. What Are You Building Today

    in Do It Yourself

    Posted

    9 hours ago, luvdunhill said:

     


    Any idea if a traditional drill press can deal with ... perpendicular force ... I am not sure the proper term, against the drill arbor? I would think the answer is no?

     

    I used a vertical drill press a few years ago to mill the backside of a 10mm aluminium front panel in order to fit a 1/4 jack. I did very shallow passes of mess than 1milimiter each time (about 1/32 inch).

    The chuck didn't suffer any abnormal wear.

  5. and now for something completely different part 3

    in Do It Yourself

    Posted

    1 hour ago, Pars said:

    Because these are used in a Darlington configuration, the matching is a bit different on these. You can use either the MJE or MJF (the MJE tabs aren't isolated so you'll need pads and washers to insulate these from the heatsink). I would probably suggest 16 of each or so?

    Could you elaborate on the matching process then? Shouldn't I just use 3 matched N and 3 matched P?

     

    ps: check your inbox

  10. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted

    7 hours ago, luvdunhill said:

     


    There are M3 versions of those heat sinks. I wish I had some more. Someone here found them for me, so maybe a search would turn them up. I would definitely get a few extra of them if someone would send them over to us here in the US.

     

    If you send me the info regarding the right model I could help buying them here in europe and sending a package over the pond.

  14. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted

    On ‎06‎-‎12‎-‎2017 at 2:57 PM, astro said:

    I tried aluminum heat sink before. It does have wider fin gap, but less fin count and much shorter fin height.

    The final stable temp is higher than the one you see in the pic. At last,  copper has higher thermal conductivity.

    I have to say sorry that currently I have no capability to handle a group buy, but I would like to provide the drawing and seller link if you want.

     

    Astro could you share the seller info and your case drawings please? A few of us might be interested in a group buy if the price is good.

  15. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted · Edited by MASantos

    On 25/11/2017 at 4:32 PM, astro said:

     

     

    107716.jpg

    Those heatsinks have very narrow fin spacing, better suited for forced cooling. Natural convection heatsinks have wider spaced fins to allow air to move.

     

    This said, any possibility that you could order more of those cases for those interested? I might be interested in 2 cases depending on price.

     

  16. KG Balanced Dynahi build discussion thread

    in Do It Yourself

    Posted

    On 30/11/2017 at 5:34 PM, Pars said:

    I know the Salas stuff is well thought of on diyaudio. Normally a balanced Dynahi would use two GRLVs. I don’t think Kevin is a proponent of shunt regulators but I’ll let him weigh in.
    I am planning on building Salas’ Simplistic phono stage but was going to use a GRLV plus PSU (or maybe dual mono GRLV plusses) for this instead of the included Salas shunt. I did my own board layout with the phono only.
    The GRLV is very low noise.


    Sent from my iPhone using Tapatalk

    I remember Salas saying how having the reg on the same board as the phono was a big influence on the great sound of the FSP. You could use the GRLV before the shunt, some people used a jung super reg as a "pre regulator" for the integrated shunt. 

  17. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted · Edited by MASantos

    18 minutes ago, ti5002000 said:

    No problem. It's not risky if you know the right source.. Justin just bought a pile of new old stock of jfets. Anyway, if you could sell me jfets to replace the that 340 I will be a buyer. If the price is right. But anything pm me. Thanks

    Sorry, I have enough jfets for me, but not enough for selling! :) You can buy them on diyaudio.com for about 50 $. 

  19. The Multi Amp aka Dynalo Mk2

    in Do It Yourself

    Posted

    Hello guys, long time since I posted around here, hope everyone is doing well.  I am looking into the dynalo mk2 for a new headphone amp. I've read around the thread and still have a few doubts.

    1- I've seen some references to a BOM for the Kerry dynalo mini board and also for the"normal" SMD version but couldn't find them anywhere. Could someone point me out where to find them? 

    2- The GRLV seems to be the go to choice for the standard build. It does have some choices regarding output voltage and configuration, but I couldn't find it in the grvl thread.

    3- Has anyone compared the bjt input IC  with matched jfet quad input? I have plenty jfets to use, any parts changes needed to use them instead of the THAT340?

    4- I really like the small for factor of the mini board with all the components in one board. I'll will be driving sennheiser hd650 (6xx actually), would the extra output capability of the "regular" board be an advantage here? I've seen some references of running very warm, should this pose a problem in the long run?

    5- I'll try to ask in the FS forum if anyone has spare boards for sale, if I don't have luck which gerbers should I use to order boards? There are many versions of the GRLV and dynalo mk2.

    Sorry for all the questions I haven't been around much and didn't follow the development closely.

  22. Wine fridge

    in Miscellaneous

    Posted

    8 hours ago, shellylh said:

    I'll mostly be using to store wine for the future.

    Cool! you might want to contact a few speacialized stores to get their opinion on brands and whatnot but overall go for the one with the best temperature and humidity control and anti vibration circuits.

    And I would recommend a unit with a single temperature setting dialled for whites. To serve a red it is only a matter of taking it out a few minutes earlier and letting it warm a bit. No harm whatsoever in storing them below serving temperature. Multi zone units are much more expensive and there will always be interaction between the 2 sections.

  23. Wine fridge

    in Miscellaneous

    Posted

    Are you looking to have wine and beer at the right temperature for daily drinking or do you plan to use the fridge to age wine? This is a most important question, wine ageing fridges are usually built to much higher standards and feature better anti vibration hardware (vibration is one of the main problems of cheap wine fridges and it will ruin the wines). 

    If you are looking for a frige to have your day to day drinks at right temp you might want to look for smaller unit, say 40-60 bottles with better built quality such as the one Nate pointed out. 

  24. Should I Get an HD600?

    in Headphones

    Posted

    3 minutes ago, EdipisReks1 said:

    I very much doubt it.  This smells like Sennheiser clearing old parts inventory.  

    I don't think that sennheiser will be dropping the HD600/650 from the lineup. This might be a very smart move from them to get quite a few units to the market and increase brand recognition with millennials and get some of the market away from beats. 
     

    I bought a pair, I sold my hd650 long time ago and this was a nice opportunity to get a new pair at a great price.

    Now I just need to build a new amp for them...

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