Marshall Guv’nor/Guvernator- no sound

megatrav

Well-known member
Got this guy all wired up. I tried to make it as neat as I could.
The pedal powers on but there is no sound bypassed or engaged.
I am thinking I either goofed on the switch or jacks.
Here are some pics. 3942FCCB-2330-42B5-9F63-0FCCBC15CB5E.jpeg C94818FE-E2DD-4E4E-A1A2-8D7B1B027175.jpeg B1812D7E-2992-4F59-B39D-7B0DF0EF03B5.jpeg 5FC6125E-3BC7-4139-BF1F-AF6C473C43F9.jpeg 785EE9D7-FA49-43CF-AC38-E461B67C901A.jpeg 3E6BA050-BD16-4418-9DE2-93C987D75733.jpeg DCDA229C-EBBF-4CBD-BFBB-DDC3A6F93614.jpeg BD49430C-CB05-4E74-B6A7-1771FAAC1194.jpeg 91930A84-4AE9-407F-A94D-73B56804BDDE.jpeg
Any help is much appreciated :)
 
Thanks for the tips. This is the last build I will be doing for a little while. I will use less solder in the future and definitely look into smaller, different colored wire. Do you all prefer braided or solid?
 
So, I encountered some issues-

The first one is a bit a mystery to me, but hopefully someone can chime in.
I was testing the pedal and noticed it was a little intermittent. When I engaged the pedal there wasn't any sound. As I was adjusting the volume control, I nudged the LED and full sound came in.
I didn't use a bezel for this one, so I assume its shorting out to the enclosure. The leads aren't touching at all, so I assume without a bezel it needs to be mostly inside of the enclosure.
It should still work, but I may end up installing a bezel, since I do have one lying around.

The second issue is one that I figured out myself- I accidentally swapped the volume pot and volume pot. Luckily, these two aren't mounted to the board, so they should be easy to swap since I currently don't have any solder wock.

The issue is- when I was taking the knobs off, I stripped the screw on the knob on the volume control. So, I am going to attempt to drill through the tiny screw tonight and get it off. Hopefully, I can do it without destroying the knob or the pot, but we will see.

This is a good example of how rushing through soldering or not paying enough attention to detail can create more work! lol
 
So, I encountered some issues-

The first one is a bit a mystery to me, but hopefully someone can chime in.
I was testing the pedal and noticed it was a little intermittent. When I engaged the pedal there wasn't any sound. As I was adjusting the volume control, I nudged the LED and full sound came in.
I didn't use a bezel for this one, so I assume its shorting out to the enclosure. The leads aren't touching at all, so I assume without a bezel it needs to be mostly inside of the enclosure.
It should still work, but I may end up installing a bezel, since I do have one lying around.

The second issue is one that I figured out myself- I accidentally swapped the volume pot and volume pot. Luckily, these two aren't mounted to the board, so they should be easy to swap since I currently don't have any solder wock.

The issue is- when I was taking the knobs off, I stripped the screw on the knob on the volume control. So, I am going to attempt to drill through the tiny screw tonight and get it off. Hopefully, I can do it without destroying the knob or the pot, but we will see.

This is a good example of how rushing through soldering or not paying enough attention to detail can create more work! lol
When I first started building I always used a bezel, now I rarely use one. If you're using a step drill bit there is a little trick. The step bits have a small bevel to each step. I have the drill sizes I use on an enclosure marked with a sharpie so I know where they are. When drilling for the LED when I get to this step on the bit I go real slow and test fit the LED I get it to where the LED is tight in the hole, this way the lip on the bottom of the LED will prevent it from going through. This way there is no worrying about the LED coming through the enclosure and shorting out on it. It works great for 3mm and 5mm LEDs and it looks good and sleek. If I get a little overzealous while drilling and the hole is loose, I ensure just the tip of the led is poking through before soldering it into the board. Once you get comfortable with this you can put the LED where ever you'd like and run wires to the pads, it will stay there no problem, if your worried about it slipping out a small dab of glue on the side works well and it still comes out easily if you need to remove the circuit from the enclosure.
 
When I first started building I always used a bezel, now I rarely use one. If you're using a step drill bit there is a little trick. The step bits have a small bevel to each step. I have the drill sizes I use on an enclosure marked with a sharpie so I know where they are. When drilling for the LED when I get to this step on the bit I go real slow and test fit the LED I get it to where the LED is tight in the hole, this way the lip on the bottom of the LED will prevent it from going through. This way there is no worrying about the LED coming through the enclosure and shorting out on it. It works great for 3mm and 5mm LEDs and it looks good and sleek. If I get a little overzealous while drilling and the hole is loose, I ensure just the tip of the led is poking through before soldering it into the board. Once you get comfortable with this you can put the LED where ever you'd like and run wires to the pads, it will stay there no problem, if your worried about it slipping out a small dab of glue on the side works well and it still comes out easily if you need to remove the circuit from the enclosure.
So, I had Tayda drill my enclosure for me. It has a 3mm hole and the LED fits really well. It doesn't come all the way through. But for some reason, it causes the sound to go out unless its slightly pushed in from the outside. I will investigate this further. I have to de-solder some things to fix my kerfuffle with the pots
 
So, I had Tayda drill my enclosure for me. It has a 3mm hole and the LED fits really well. It doesn't come all the way through. But for some reason, it causes the sound to go out unless its slightly pushed in from the outside. I will investigate this further. I have to de-solder some things to fix my kerfuffle with the pots

Most likely you’re shorting out the power lead of the LED on something. Maybe the enclosure? Try some good ol’ electrical tape along the path of the leads.
 
A good tip for this kind of wiring is to put a bit of heatshrink tube over the wire before you solder it to the LED lead, then when the joint is soldered move the tube over the joint and lead and apply heat to shrink it down. Then you get a nice snug and insulated lead. If you are running the leads straight to a PCB then put heatshrink over them first.
 
Can you grab it from the inside with needle nose and turn it?
I don't have any that are small enough (I think) but that is a good idea that I have not tried. I may try this and tweezers. I have some really small bits, so I might be able to get it without too much trouble, but I worry about wrecking the pot. I don't want to have to order another one lol
 
see if you can force the knob off of the pot using something like a lever on the bottom of the pot pushing up (maybe a spoon, maybe two spoons with one on each side)
I did think about this, but the knob is on very tight so I am a little worried it might damage the pot. This is my last resort if the other options do not work.
 
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