bad stone . lfo not working

Started by carlozsulca, November 06, 2020, 09:20:27 AM

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willienillie

Quote from: duck_arse on November 05, 2020, 08:43:54 AM
pot(s) got solder in the lug rivets? we don't allow solder wires to the rivets, no matter how enticing they appear - it causes too many problems.

carlozsulca

I already made sure that all the resistors are well soldered and with the correct values, install the color switch that is in the schematic to be able to really hear the output of the effect and no longer the mixture of the output of the first amplifier with the effect, Well, now the signal from the first amplifier is cut off, only the effect signal comes out and the problem persists but now the volume is very low and there is no effect


carlozsulca

Quote from: willienillie on November 06, 2020, 04:24:28 PM
Quote from: duck_arse on November 05, 2020, 08:43:54 AM
pot(s) got solder in the lug rivets? we don't allow solder wires to the rivets, no matter how enticing they appear - it causes too many problems.
the pots are from a previous project but they are in good condition and mark the values that they should

Fender3D

Quote from: carlozsulca on November 06, 2020, 03:19:29 PM
I measured the voltages of pins 2,4,6,8,12,15, with the switch in manual and turning the potentiometer, it outputs 1.85V with the potentiometer at minimum and 1.91V at maximum

As Scruffie said your 4009 voltages look fine.
BEFORE attemping to build a complex circuit like this, understanding its functioning should be a good rule of thumb
Since manual control provides voltage to control FETs, you should measure what voltage you got on manual's wiper, or, even better, at point E on schematic.

Scruffie asked for pictures of tracks side, I guess it's not only a part values issue....
"NOT FLAMMABLE" is not a challenge

duck_arse

Quote from: carlozsulca on November 06, 2020, 09:20:27 AM
Hi

-excuse my bad bakelite cut


we can't excuse bad bakelite cuts, because it indicates rough/poor handling of the board, which may cause/result in cracked copper traces. as requested above, can we see your copper side as well, please ?
" I will say no more "

carlozsulca

#25
Quote from: Fender3D on November 07, 2020, 07:00:35 AM
Quote from: carlozsulca on November 06, 2020, 03:19:29 PM
I measured the voltages of pins 2,4,6,8,12,15, with the switch in manual and turning the potentiometer, it outputs 1.85V with the potentiometer at minimum and 1.91V at maximum

As Scruffie said your 4009 voltages look fine.
BEFORE attemping to build a complex circuit like this, understanding its functioning should be a good rule of thumb
Since manual control provides voltage to control FETs, you should measure what voltage you got on manual's wiper, or, even better, at point E on schematic.

Scruffie asked for pictures of tracks side, I guess it's not only a part values issue....
Yes, I have some idea of how it works since it is the second one that I built, but in the previous construction the same thing happened but I left it there and now it is the first time that I turn for help, in the printing of the pcb I was careful that the tracks are in good condition, I attach the photo of the back since now I have good lighting

edit:
that jumper between pin 13 and 14 of the 4009 is in place since in the russian project post they mentioned that there would be an improvement, I already tried with or without the jumper, the problem persists