[sdiy] Which 1/4" Jack?

[Graham Atkins]

Florian,

I can see the problem that you have which does look like a mismatch  
with that
particular plug / socket combination. However, that is not a  
Switchcraft 112APC
socket is it, or am I missing something. Here is the real thing :-

http://www.switchcraft.com/products/jack-90.html

Graham

On 17 Jan 2009, at 17:53, Florian Anwander wrote:

> 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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