One weird Jack Problem!

[Izzy]

One weird Jack Problem!

I dont know what the heck is wrong with my Ds-1 Circuit.

It is working fine but when I enclose it in the enclosure (Tin) it doesnot work.

I found out the problem was input jack. When I put Input jack inside the enclosure and tie the screws it doesnot work.
When I unlock the screws of the input jack from enclosure and and try  the input jack outside it works again.
Do you guys know whats wrong?

I checked volatge between enclosure and ground and I was surprise that enclosure had 9v running??

What is wrong here?

I dont think I have shorted anything here. Does Outputjack or Pots leak voltage??

[Bernardduur]

Did you use the jack to switch the battery on and off? If so, maybe you miswired something

[Izzy]

I checked it twice the wiring are right.

Board negetive to DC's negetive.
DC's one positive to board positive.
Dc's another postive to battery positive.
Battery's negetive to Ring.

[Meanderthal]

Ok, it sounds like you're switching + on the input jack! You should switch - instead. Bat neg should go to ring, board neg to sleeve.

[Izzy]

Yes, Battery Neg is going to the ring.
AndBoard neg is going to the sleve.

Please note that It works when I unscrew jack from the enclosure and plug guitar from top. But when I put jack back to the enclosure and and plug guitar its dead quiet.

[sfr]

Is it an open frame jack?  (this is a DIY build, I assume?)  The leaf-spring thing that sits against the tip of the cable flexs out when you insert a jack - it sounds like the tip of that jack might be shorting against something (the case, the DC jack, something like that?) when you put a cable in it.

You mention seeing 9V between enclosure and ground - that's no good. (I'm assuming the ground you measured to get that measurement is the board ground?)  Does this happen as well when the jack is outside of the enclosure?  I would worry about having 9v on the enclosure first- that's not right at all.  Are you using a non-isolated DC jack?  Did the ground and 9V on the jack get swapped? 

[Izzy]

Here are Few Pictures I guess that Might help.
In the mean time let me check if it still has 9v on enclosure when jack is out.

http://img352.imageshack.us/img352/3255/dsc00078zn8.jpg


http://img62.imageshack.us/img62/1804/dsc000792de9.jpg


http://img62.imageshack.us/img62/9933/dsc00080rs7.jpg

[Izzy]

Hmm now when I checked there is no 9v on the enclosure. Thank god.
Now when I plug guitar with only input jack outside enclosure it oscilates (quiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii) and the pitch chanegs as I tough  the jack. But when I insert into the input jack hole of the enclosure it wont wrok.

I also tried inserting input jack in the enclosure without the jack touching the wall of the enclosure and it still wont work?

[moody07747]

One weird Jack Problem!

I dont know what the heck is wrong with my Ds-1 Circuit.

It is working fine but when I enclose it in the enclosure (Tin) it doesnot work.

I found out the problem was input jack. When I put Input jack inside the enclosure and tie the screws it doesnot work.
When I unlock the screws of the input jack from enclosure and and try  the input jack outside it works again.
Do you guys know whats wrong?

I checked voltage between enclosure and ground and I was surprise that enclosure had 9v running??

What is wrong here?

I dont think I have shorted anything here. Does Output jack or Pots leak voltage??

When making my kick trigger for my drum set it would not work when i installed the 1/4 phone jack into the metal case...turns out it was grounding out to something else so i put some electrical tape around the hole of the metal where the jack was installed and its been working fine since then.

[Izzy]

I wll try that, But what is causing oscillation?

[Izzy]

Foudn otu that the Oscillation happens when The tone Is  FULL and If I touch  that input wire ...then the oscilation  keeps oon happening.
Strange!

Now My problem is When I put inside the enclosure (i.e when the input jack touches the enclosure) it wonr work.
When I remove the input jack from enclosure it works again!

I check the encliosure and it is connected to the ground. And I also check edfor continuity between the enclosure and the outer side of input jack which touches the enclosure and they have contuinuity. BUt when they two touch (probabaly) its not working ?? why?

And is the outer side of the jack supposed to be ground? I mena does sleve and the outerside of the jack are connected internally.?

[sfr]

Okay, I'm not sure exactly what you mean by "outer side of the jack" - do you mean the metal sleeve over the end of the part of the guitar cable you plug in?  Yes, that should be ground. 

BTW - does this thing work with the jack in the enclosure, but the effect bypassed? 

Make sure that any guitar cables you're using are good - I know I've spent a while looking for shorts when it turned out I had just grabbed a wrong cable.   (I *knew* that thing was sitting conviently on the workbench for a reason - I had put it there so I'd remember to fix it!)

From the symptoms you describe, it sounds like you've switched the tip/sleeve connections on the input jack (or possibly at the switch) and that when you put the input jack into the enclosure, you're grounding the signal from the input.  (Same thing as turning your volume pot all the way down)

I would plug a guitar lead in that input jack, and make sure that input jack is clear of the enclosure.  Now using the other end (the end not plugged into the effect) of the guitar lead to probe from, make sure you have continuity between the sleeve of the jack and ground on the board as well as the enclosure.  You shouldn't have continuity between the sleeve and anywhere that's not ground (input, 9V, etc.) Probably want to check this with the effect both on and off.  This is assuming you have the ground lug on that jack attached to a wire, and that you're not just using the body of the jack to make that ground connection.

Now with the effect switched on, make sure you have continuity between the tip of that guitar lead and the "Input" on the board.  And not anywhere else.  With the effect switched off, you should have continuity between the tip of that guitar cable, and the tip of a guitar cable plugged into the output jack.

If everything checks out okay, put the input jack back into the enclosure - plug a guitar lead into it, measure from the other side, make sure you don't have continuity between tip and sleeve.  Check in both bypass and with the effect on.

That also occurs to me - if it was the *output* jack that was backwards, I think you'd get the same symptoms you've described, and it might be worth checking the wiring on that one as well. 

[sfr]

Actually - looking at this photo in more detail - it looks like you may have the tip and sleeve miswired on the jack at the left.  I can't tell for sure from the photo, but worth checking.

[Meanderthal]

 Yes, I see a possible problem with that shielded cable. Ok, on the output jack, notice that the inner lead is soldered to the sleeve, and the outer(shield) is soldered to the tip. This is opposite of normal. I can't quite make out what's soldered at the switch, but I see that the shield appears to be soldered to the sleeve on the input, which is the opposite.
It might be a good idea to get rid of the shielded cable and just use hookup wire to rewire your bypass switching- your enclosure will shield the circuit anyway, and it really appears that is where the problem lies.