November 26, 2018 at 7:11 am #3146AnonymousInactive
today i’m making the foxy lady, but the first test is not concluant.
i’ve voltage in the pcb, but not on all composents or resistors. the bypass led dont work. the two diode don’t work too.
i’ve sound in bypass mode. nothing with the effect.
i’ve check evrything i could but i don’t see the problem..
so how i can check more? step by step? or if you see something wrong, tell me please.
thank u to the community
braKoNovember 26, 2018 at 2:14 pm #3153
Since you are using a battery, you need to plug a 1/4″ plug into the IN jack to activate the power. You said you have power to the board. The power must reach both boards. Confirm that you have power to all transistors. Provide voltage measurement for all legs of the transistors and the supply voltage.
If you do not have voltage to all transistors, carefully reflow all solder joints. Since you did not use SOCKETS on the transistors, you may have damaged one or more of them.
SIgnal must pass through jumpers. For all features to function, you need to install jumper wires on J1, J2, J3 and J4. I can’t see all of these on the photo. Confirm.
The status LED is not working because you have it installed on the main board. To use the LED on the main board, you must wire S4, S5 and S6 to the foot switch. A 3PDT board is not used. When a 3PDT board is used, the LED is installed on that board and S4, S5 and S6 are not used.
I cannot see if the blue wire from the 3PDT board BO pad is connected to the IN pad with a “T” on the main board. I think it is there.
Make these corrections and report back.November 26, 2018 at 2:35 pm #3155AnonymousInactive
yes i tried with a 1/4 plug of course, and with a transfo 9v.
all 4 jumper are jumping.
so i’ve to check all transitors and reconnect the led to the 3pdt board (have i to put one resistance on this board???)
for this i don’t understand sorry : “I cannot see if the blue wire from the 3PDT board BO pad is connected to the IN pad with a “T” on the main board. I think it is there.”
and an other question, can i use a b250k pot for the mid scoop? with a resistance maybe?
thank uNovember 26, 2018 at 3:03 pm #3157
Yes, the LED needs a CLR (resistor) on the 3PDT board.
Confirm the connection from the 3PDT board pad marked BO to the main board IN pad marked with a “T”.
The Mid scoop uses a 250K pot. If you can add a resistor of about 28K between lugs 1 and 3 of the pot, that will make about a 25K pot.November 26, 2018 at 6:34 pm #3165BarryKeymaster
We can’t see the other side of the board to make sure you connected to the correct pad.
The Green Wire [Out] looks OK but we cannot see the Blue Wire [IN] in the photo.November 27, 2018 at 1:14 am #3171AnonymousInactive
i’havnt check voltage in transistor yet, but :
i have resoldier de led on the 3pdt board with a 2,2k resistance, it’s working
“Confirm the connection from the 3PDT board pad marked BO to the main board IN pad marked with a “T””. so i have resoldier the wire BI of the 3pdt to the “T” in on the board like in the manuel and no from the BO… is it ok?
so now it’s working but i’ve a great loss in the disto… so i have to recheck all value of all composents…
and after i will modif it with the mid scoop and maybe transfer the layout 😉
thanksNovember 30, 2018 at 3:59 am #3203AnonymousInactive
ok, i’ve check my board but i don’t know from where the problem is coming..
the problem is that i’v a great loss in the outuput volume..
any suggestion please?
thanksNovember 30, 2018 at 1:34 pm #3207
Since you have made several wiring changes, I think we should take new photos to help us see what has changed.
Now that you have signal passing, confirm that you have signal on both bypass and effect settings.
Provide voltages on all transistors, all three leads and your battery voltage. Use the recommended format of Q1, C,B,E, etc.July 31, 2019 at 4:55 am #6490AnonymousInactive
hello, i’m back to finish to resolve the problem that i have on my foxy lady.
have i a problem on the Q4???
my problem is the same : sound’s effect seems to be very very far away!
thank you for you helpingJuly 31, 2019 at 5:02 pm #6491
The emitter voltages on Q1, Q2 and Q3 all seem to be low. Q4 voltages are also wrong. I would expect to see Q4 C-0.0, B- 0.7, E- 8.0 or close to these values.
FIrst, report your battery voltage. Then provide new measurements of all four transistors. Then remove Q4. Report new measurements of all four transistors including the empty Q4 values.August 1, 2019 at 8:20 am #6494AnonymousInactive
hi,battery voltage is 8,9/9V. with Q4 all values are the same. without Q4, the same same…August 1, 2019 at 12:26 pm #6497
In the above photo, Q4 appears to be installed incorrectly. It should be installed as shown on the board silkscreen. Check this and provide new measurements of Q4 installed and also the voltages at the Q4 socket without the transistor installed.August 2, 2019 at 4:23 am #6500AnonymousInactive
Q4 7 / 7,8 / 7
without 8,8 / 8,8 / 0
problem!August 2, 2019 at 5:07 am #6501AnonymousInactive
i want to make the modif for the mid scoop.
is it this one to replace c10?
thank uAugust 2, 2019 at 5:58 am #6502AnonymousInactive
when i touch behind the pcb and create contact with my finger, near q3 and volume, volume come up! bizarre?August 2, 2019 at 10:02 am #6503CybercowModerator
brako – living human skin possesses natural electrical properties such as resistance and capacitance. The capacitive nature of human skin is half the reason why touch-screens on phones (and other devices) work and the combined resistive and capacitive nature of skin is why touching live audio circuit connections can alter the state of that live electrical audio circuit. Not knowing precisely where you are touching is problematic in helping troubleshoot the issue. But if touching the solder-side near Q3 and volume brings the volume up, it suggests that something in that part of the circuit is not right – a bad solder joint, an incorrect component value, a bad component, etc. It’s hard to say because we don’t know precisely what was “touched”. Do you have an audio probe and know how to use it?August 2, 2019 at 1:57 pm #6504
We have not seen a photo of the solder side of the board. But, I believe you may have a bad solder joint. SInce you did not use sockets for the transistors, you may damage them when reheating their connections. It also appears that you removed Q4 and then installed a socket for it. Since we are getting bad voltage readings at Q4, that transistor may be damaged.
I suggest you carefully reheat all solder joints and retest. Be careful not to apply too much heat to the transistor junctions.
I do not recommend making any further mods to the circuit until you have the basic circuit functioning properly.
- You must be logged in to reply to this topic.