Voodoo Main Discussion

[Altair]

Don,
please take look to your breadboard and update it's schematic!
We need to know how to proceed.

[6666]

Moreover, to do delay line with smith trigger the pull-up resistor must be connected to the input gate pin, not at the output.
Referred to the schematic:
-R48 must be on pin 5 of 40106;
-R22 must be on pin 1 of 40106;
-C25 and the third gate of 40106 don't should be needed if modification at post #956 will be made.

This is confusing, you said "-R22 must be on pin 1 of 40106;" do you mean resistor 54 which has a value of 22K ? going by pin number changes in post #952

R22 which is 270K is on pin 1 and 2 of U3a

[Altair]

Ohh, sorry to everyone, you rigth!
I meant: R54 (22K) must be connected to pin 1 of U29 (40106).
About: "-C25 and the third gate of 40106 don't should be needed if modification at post #956 will be made" I meant that if the modification described at post #956 will be made, probably C25 and the third gate of 40106 will no needed anymore: a direct connection between pin 2 of U29 and pin5 U2 will be required instead.

[SilverSurfer17]

Well i figured out a few things with this experiment when someone says you can go higher wattage on a resistor thats not always the better option for fitment not knowing higher wattage means bigger resistor checked the board 4 times for any shorts none seen plugged it in turned it on got a few beeps a pop and nothing checked the speaker out put and it has 12 volts coming out of the positive for the speaker and the speaker was hot checked it numerous times and no visible shorts

[dfbowers]

Don,
please take look to your breadboard and update it's schematic!
We need to know how to proceed.

Yes.. sure will!! I by moving everything over to my protoboard It’s a good check. You guys are too fast sometimes. More in a bit..

[surfdetector]

the speaker was hot checked it numerous times and no visible shorts

Hopefully you are not using an 8 ohm speaker. High impedance headphones are a better fit for this Original Voodoo.

[SilverSurfer17]

Yes i was i used what i found in a waterproof speaker and in the ohm range that was listed but that still doesn't explain 12 volts on the positive side of the speaker i assume it fried that speaker also if it is a short or wrong installed part it could of taken out something else i have the 5 volts on both test point 14 and 15 and have a wave form coming out the TX but im as far as i can go until i get some more expendable cash im bust for awhile after having to buy the parts the oscilloscope and new multimeter i need to get Georges book a pole a coil a Arm rest coil cable and some other minor parts plus whatever might of toasted

[SilverSurfer17]

Also im curious you coil guys i was thinking back to my Tesla coil days and i know the primary coils where copper tubing any of you guys tried making one with tubing or does it give off to much skin effect because its hollow also have you tapped coils at different places to get different inductances and ever messed with that instead of just winding a coil to a certain length maybe its just me seeing similarities between the two

[Orbit]

[MartinB]

Yes i was i used what i found in a waterproof speaker and in the ohm range that was listed but that still doesn't explain 12 volts on the positive side of the speaker i assume it fried that speaker also if it is a short or wrong installed part it could of taken out something else i have the 5 volts on both test point 14 and 15 and have a wave form coming out the TX but im as far as i can go until i get some more expendable cash im bust for awhile after having to buy the parts the oscilloscope and new multimeter i need to get Georges book a pole a coil a Arm rest coil cable and some other minor parts plus whatever might of toasted

Check that Q12 is still OK

[SilverSurfer17]

Thanks yeah i saw that was the first thing inline of the output socket and figured that was the first place to start ill have to hunt down my soldier wick and pull it out and check it thanks

[SilverSurfer17]

I guess by the laugh it must not be the same trying to get the best tuning you can as a Tesla coil ?

[ivconic]

Ohh, sorry to everyone, you rigth!
I meant: R54 (22K) must be connected to pin 1 of U29 (40106).
About: "-C25 and the third gate of 40106 don't should be needed if modification at post #956 will be made" I meant that if the modification described at post #956 will be made, probably C25 and the third gate of 40106 will no needed anymore: a direct connection between pin 2 of U29 and pin5 U2 will be required instead.

[6666]

[ATTACH]54191[/ATTACH]

Love it

[ivconic]

Fortunate coincidence in my drawing is that i did lot of wire jumpers on the top layer and now it will need not much of a surgery to correct those.
Only one track have to be cut actually, the one which goes from pin 2. to trimmer.
Jumper that goes from pin 6. omitted now and trimmer side soldered to close trace that goes from pin 5.
C26 soldered only with one pin to pcb, other pin in the air and with wire connected to pin 6.
Wire jumper that goes from pin 4. omitted. Pin 5. at 4066 connected to pin 2. at 40106 with short wire.
C25 omitted.
And that's all from the "surgery".