Honey Bee Stripboard Help

[ToneRangerAudio]

Hey all,

I built this Honey Bee clone on stripboard this morning and am having some issues with it. There is a whine that occurs when the effect is engaged, and the drive pot changes the pitch of the whine, as does my guitar volume knob. I've looked over all the placements, polarities, connections, and solder joints and can't find anything wrong with it. It's making me think it's the op-amp. When I removed the op-amp, there was no whine, obviously. I ordered it from Tayda and thought it was the right CA3130, but does the EZ at the end mean something else? I tested the circuit on my breadboard and know for certain that everything was connected and placed correctly.

Here are the voltages for the op-amp and JFET:

1. 0.07
2. 4.31
3. 4.29
4. 0

5. 0.07
6. 4.34
7. 8.64
8. 4.38

D. 8.64
S. 0
G. 0

I've attached images of the stripboard front and back, the stripboard layout I'm building from, the op-amp I purchased from Tayda, and the data sheet for the op-amp.

Any help would be appreciated! 

[antonis]

There are some suspects here:

[idy]

I think EZ is a suffix denoting lead-free environmental compliance. You should be OK if you don't swallow or smoke it.

What are you using to power it? Battery? Unregulated brand-x power supply? Those will do that exact thing every time.

[ToneRangerAudio]

There are some suspects here:

Already checked all of those :/

[ToneRangerAudio]

I think EZ is a suffix denoting lead-free environmental compliance. You should be OK if you don't swallow or smoke it.

What are you using to power it? Battery? Unregulated brand-x power supply? Those will do that exact thing every time.

Voodoo Lab ISO 5 in the 9V slot on my workbench straight into my bread board

[ToneRangerAudio]

I am noticing the that when I remove one of the grounds from veroboard, the whine goes away, but I still have no output

[ToneRangerAudio]

Okay, the ground wire at the bottom left is reading 9V when I test it with my multimeter. Kind of strange it's reading that since it's going to ground?

[Clint Eastwood]

The voltages of the jfet don't make sense. The drain voltage should be lower than the supply voltage and the source voltage higher than zero volts. This jfet does not seem to be working at the moment. Maybe take it out and check it.

[idy]

Yes, if that lower left ground wire is reading 9v, nothing will work.

That layout is a little funny in that there are two wires that need to be connected to ground by you. Most of us would make the layout one column wider or something and take care of that. Run a wire from the lower right corner to oner of the empty spots in the top right row.

You are reading the bottom half of what should be a 31.6k/31.6k voltage divider but is instead a 63.2k path to supply.

[soggybag]

If that's a dual op-amp it looks like pin 8 is low, should be 9v?

[idy]

CA3130 is a single opamp. Used because it is MOSFET input, CMOS output. Mojo if it overdrives. The data sheet is there.

[duck_arse]

you show no circuit diagram. we are in the dark.

please see the arrows. what value have you fitted for the red arrow?
green arrow should be 360k?
white arrows should be 31k6 [really? why? why not 33k?]
purple arrow should be 27k?




 

[ToneRangerAudio]

Yes, if that lower left ground wire is reading 9v, nothing will work.

That layout is a little funny in that there are two wires that need to be connected to ground by you. Most of us would make the layout one column wider or something and take care of that. Run a wire from the lower right corner to oner of the empty spots in the top right row.

You are reading the bottom half of what should be a 31.6k/31.6k voltage divider but is instead a 63.2k path to supply.

I used two 30k resistors instead of the 31.6k pair. Should I switch them to 33k?

[ToneRangerAudio]

you show no circuit diagram. we are in the dark.

please see the arrows. what value have you fitted for the red arrow?
green arrow should be 360k?
white arrows should be 31k6 [really? why? why not 33k?]
purple arrow should be 27k?

I'm just showing what I built it off of from online. Didn't have a circuit diagram.




 

[antonis]

I used two 30k resistors instead of the 31.6k pair. Should I switch them to 33k?

Nahhh.. As far as both are of the same value, pin 3 is biased (via 360k+15k) at half the supply voltage..

A reference schematic:

[ToneRangerAudio]

I used two 30k resistors instead of the 31.6k pair. Should I switch them to 33k?

Nahhh.. As far as both are of the same value, pin 3 is biased (via 360k+15k) at half the supply voltage..

A reference schematic:

Cool! Yeah that's what I thought!

[ElectricDruid]

So where are these 30-whatever-K-they-are resistors on this schematic?

I'm still feeling like we haven't got the complete information. God, I hate stripboards with no schematics (I should probably have that engraved on my tombstone, although at that point, I could maybe tell him in person?!).

[idy]

I can't upload an image, but Aion's Procyon is a clone and shows the two 31.6k to where the above schematic uses 47k,  R18 and 19.

[PRR]

I can't upload an image, but Aion's Procyon is a clone and shows the two 31.6k to where the above schematic uses 47k,  R18 and 19.

https://aionfx.com/project/procyon-natural-overdrive/
https://aionfx.com/app/files/docs/procyon_documentation.pdf

The values of these resistors should be nearly equal, but can vary over a very wide range 10k to maybe a Meg. Someone found a box of 31.6k under the bench and made good use of them. Like the time  a box of 47 Ohm 2 Watt fell off a truck in front of me-- I was series-ing 47s for everything for years.

[Slowpoke101]

The resistor that the RED arrow points to should be 2K2, not 2M2.
The resistor that the PURPLE arrow points to should be 27K.
The resistor that the GREEN arrow points to should be 360K (but anywhere from 360K to 560K will be fine). 10K is far too low (well, I think that is what the valve of the resistor is that installed there at the moment).
Lastly the WHITE arrows point to the resistors that set the Vref voltage. Use 31.6K if you want to but you can use anywhere from say 10K to 100K without problems, as long as both resistors are of the same value.