According to Mr.Bean`s rules
1) Bear Hug Compressor
2) No dry or wet signal. Only HUM . Doesn`t even bypasses may guitar signal when OFF.
3) Nothing yet as I built it a week ago left it for couple of days as it didn`t start first time (hours of trying) and tried again at Sunday - still nothing.
4) Subs: C3,C6 and C8 - used tantalum (little + mark soldered to square pad) ; D3 - D4 - BAT41 ; Q2 - BC550 (given sub according to google) ; Q3 - BF245 (same as Q2)
Will post pics when I make some.
Sounds like it's boxed. Did you try it on a test rig before boxing it up?
We're going to need pics, but right now, hum and no signal even in bypass signals a footswitch and/or jack wiring error.
Thank You Midwayfair.
It`s not boxed. I did that with switch, jacks and etc. wired according Madbean`s SWDiagram outside. I used it with Harmonic Percolator and it is working.
Can`t make photos now. Forgot to mention it is self etched but I`ve probed all traces with my DMM. There are no bridges and no cuts.
Quote from: koky on February 12, 2013, 07:42:10 PM
Thank You Midwayfair.
It`s not boxed. I did that with switch, jacks and etc. wired according Madbean`s SWDiagram outside. I used it with Harmonic Percolator and it is working.
Can`t make photos now. Forgot to mention it is self etched but I`ve probed all traces with my DMM. There are no bridges and no cuts.
Did you ground BOTH sleeves of the in/out jacks?
Yes.
Quote from: koky on February 12, 2013, 07:47:00 PM
Yes.
Well, the first thing to do is fix the bypass. Once it's working in bypass, we can start working on the board.
Get out your multimeter and check that, in bypass mode, the in jack's wire is connected to the out jack's wire and nothing else. Flip the switch, and check that the board in is connected to the in jack's wire and nothing else on the switch. Do the same for the output.
Do you have an audio probe? If not, now might be the time to make one.
I`ll do that ... but tomorrow. Now I`m too tired and it is 10 PM here. Thank You again. I know that it will be fixed.
By the way great songs for the FAWM contest. Wish you luck.
Quote from: koky on February 12, 2013, 07:59:59 PM
I`ll do that ... but tomorrow. Now I`m too tired and it is 10 PM here. Thank You again. I know that it will be fixed.
By the way great songs for the FAWM contest. Wish you luck.
Thanks! Good luck with the pedal, and have a good night's sleep. That always helps. :)
Hello! Just managed to get back home from two days at work and in a hurry to post pictures of "Test Rig" and Bearhug.
"Test Rig" It`s not boxed because that is my last 3PDT switch and I have to wait 2 weeks to fill my stash.
(http://i608.photobucket.com/albums/tt164/kokySX/Image0368_zpsafdcea3a.jpg)
(http://i608.photobucket.com/albums/tt164/kokySX/Image0370_zpsfa39b242.jpg)
Bearhug
(http://i608.photobucket.com/albums/tt164/kokySX/Image0372_zps895a50ff.jpg)
Like mentioned above with this "rig" I`ve tested PepperSpray too and it`s working. Brilliant buy the way.
And if you plug your guitar in without the bearhug board connected to anything, do you get bypass signal? Like I said, you need to confirm that you have bypass before we can begin troubleshooting your Bearhug board if necessary. Once you have bypass, if the bearhug is not working, you'll need to use an audio probe to find out where the signal is being lost, and take voltages on Q1 and Q2.
Clearer pictures of your wiring would be way helpful also.
Quote from: jimilee on February 14, 2013, 05:28:35 PM
Clearer pictures of your wiring would be way helpful also.
And of the board. The values are unreadable in that picture. Take it out in the sunlight if you have to.
I have bypass signal.
So I assume that I have to build audio probe to what is going on with this circuit. But that unfortunately will happen at Saturday. Have to be patient till then (me). I`ll also take good camera and will make pics ( stupid cell camera). Thank you for your time an advises.
There's a couple things you can do in the meantime. Looks like you used sockets, so that should make a few things easy.
1) What's the voltage on each pin of Q1 and Q2?
2) which way is Q2 facing? BC550 is a backwards pinout from the MPSA18.
1) Q1
0.01
0.01
-0.02
Q2
0.22
0.61
8.16
2) Wrong :-[
And still nothing. I made new Test rig following Jacob`s description without AUDIO PROBE because I don`t have DMM probe cord at hand.
Q1 is the MOSFET, the BS170. I just want to make sure you've probed the right part. 0v there means your voltage isn't making it to the MOSFET.
The only component connected to the drain of Q1 is R4. Measure on both sides of that, and check your soldering and continuity to make sure that the 2.2K resistor is connected to the drain. Make sure the other side is connected to the cathode of the polarity protection diode (D1). Then make sure it's not connected to anything else - like ground.
Since you ALSO aren't getting any voltage at the gate of Q1, that most likely means R5 also isn't connected properly to the 9v. Since both of these parts are very close to the ground connection, I suspect that there's a bridge to ground there.
Q2 wouldn't have caused you to get no sound. I just wanted to make sure it was facing the right way for when we get sound. :)
So SO SO sorry for my stupidity. Rookie mistake.
Q1 8.63 0.01 0.01
Quote from: koky on February 15, 2013, 05:48:35 PM
So SO SO sorry for my stupidity. Rookie mistake.
Q1 8.63 0.01 0.01
Source and gate voltages are both too low ... they should be fairly low, but the gate is still connected to a bias voltage and you're reading essentially 0 volts. Still sounds like it might be a ground issue somewhere, especially because you're getting hum and not "silence." Again, check continuity against the schematic, measure components if you have to. The dry path is very, very few parts, and if something is wrong, you should be able to find it.
Try replacing the MOSFET with a silicon transistor for a moment. I want to make sure it's not a blown MOSFET. Also, double check the pinout against the datasheet and make sure it's in the circuit correctly, although putting it in backward should give you silence and not hum.
I have followed all paths and I found that the trace between middle leg of Q1 and C2 is MISSING. :-X
Repaired !!! Meanwhile volume pot lugs has broke. :-X Repaired that too!!!
Plugged the effect and ... VOILA here comes the lovely sound ;D
And when it is NOT MEANT TO BE ... 9V wire just broke :-[ Repaired that!!!
Plugged again ... HUM, Motorboat, HISSS !!!
SO FINAL VERDICT - I will re-flow all pads and hopefully I will have compressor at the end of this week!
Thank you for your time midwayfair or I can call you Jon.
Here I have found great community and great people that are ready to spend time and knowledge just to make this world a better place to live.
Thank you all DIY`ers.
Kostadin
Quote from: koky on February 15, 2013, 07:52:23 PM
I have followed all paths and I found that the trace between middle leg of Q1 and C2 is MISSING. :-X
Repaired !!! Meanwhile volume pot lugs has broke. :-X Repaired that too!!!
Plugged the effect and ... VOILA here comes the lovely sound ;D
And when it is NOT MEANT TO BE ... 9V wire just broke :-[ Repaired that!!!
Plugged again ... HUM, Motorboat, HISSS !!!
SO FINAL VERDICT - I will re-flow all pads and hopefully I will have compressor at the end of this week!
Otlichna! (You're from Russia, right?) So glad to know it's on its way to being working. :) Hopefully after a reflow it'll fire up and you can get your squish on. :)
>or I can call you Jon.
Of course!
No I am NOT from Russia. I am from Bulgaria.
Quote from: koky on February 15, 2013, 08:01:49 PM
No I am NOT from Russia. I am from Bulgaria.
EEK! Sorry. No offense meant, I just recognized the name as eastern European. :)
No I`m not offended.
Still nothing. I did what i said before. I`ll try to build it on prefab board instead of etched. Can I use this https://dl.dropbox.com/u/9878279/Jon%20Patton%27s%20layouts/Bearhug%20layout.pdf as guide to do so?
Kostadin
Quote from: koky on February 17, 2013, 12:50:20 PM
Still nothing. I did what i said before. I`ll try to build it on prefab board instead of etched. Can I use this https://dl.dropbox.com/u/9878279/Jon%20Patton%27s%20layouts/Bearhug%20layout.pdf as guide to do so?
Kostadin
I wouldn't give up on that etch yet. You got sound once, that means it's working. You just need to find a bad trace or solder joint -- go through with your multimeter against the schematic. It'll be a lot faster fixing this one than soldering up a new on on perfboard.
In any case, yes, that's my perf layout and it's verified a couple times over.