[sdiy] Which 1/4" Jack?

[Florian Anwander]

Hi Tony

Now I uploaded the pictures of the jacks and sockets (rought 600kB pics, 
not edited, no html around):

http://fa.utfs.org/diy/speck_xtramix/jacks.jpg
this picture shows both jacks in comparison. If you look at the shade 
that the flashlight is causing, you see that the jack with the 
metalhousing has a tip, which is more round at its "wasp-waist". The 
jack with the black plastic housing has a sharper wasp-waist.

http://fa.utfs.org/diy/speck_xtramix/socket_switch_working.jpg
This is the socket with the working jack inserted. You can see that the 
tip contact is raised.

http://fa.utfs.org/diy/speck_xtramix/socket_switch_not_working.jpg
This is the socket with the not working jack. You can see that the tip 
contact is very close to its switch contact. The shaft contact is raised 
normally.


Best regards, Florian


Oakley Sound wrote:

> Florian > There are some jack forms, which do not open the switch of the 
> pin contact. Since the switch contact is connected to ground the input 
> was shortened.
> 
> This is interesting. I have had no problem with any Switchcraft sockets 
> or plugs.
> 
> But if Speck used the 112APC printed circuit board mounted sockets it is 
> imperative that a largish hole be placed in the PCB to allow the tip of 
> some longer plugs to poke through. Some plugs are too long and will 
> touch the PCB and therefore not push in far enough and not break the NC 
> contact.
> 
> I have seen at least one commercial product where the makers didn't put 
> that hole there and any inserted jacks would leave the NC connection 
> closed thus shorting out the tip.
> 
> In this instance its worth using the blunt nosed jack plugs which mostly 
> come from the European and US makers.
> 
> Tony
> 
> www.oakleysound.com
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