making VOX Treble booster

Started by oscar, April 25, 2006, 03:33:51 PM

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oscar

Hello,
I am trying to make this treble booster
http://www.blueguitar.org/new/schem/_fx/vox_treboost.gif
i currently am using two mono jacks because they were out of stereo jacks in my local shop. I plan on changing the input to a stereo when i can. But i am not sure how to wire the mono input jack, do all the ground wires go on the same lug as the black battery cable? At the moment when i plug it in, it makes the sound quieter. Any thoughts as to what might be the problem? All the soldering is good. I can only think that i have wired the input jack wrong.
Thanks a lot,
Oscar.

oscar

I forgot to mention i changed the transistor from a 2N2924 to a BC109.

leonhendrix

You can wire the black battery lead to ground, it doesnt have to be on the jack but this means the battery will drain even when unplugged

smnm

If you don't use the stereo jack to switch on the effect you need a mini switch to open and close the power connection. I actually put an on/off switch like this in some of my early pedals so I could leave them plugged in without draining the battery, but I switched (no pun intended!) to the conventional stereo jack as it's one less hole and less wiring.

Don't know about the volume loss, try the voltages etc thing as in the 'what to do when it doesn't work' sticky

S

oscar

It works. It turned out i had confused the 1k resistor and the 100k resistor. Anyway it sounds awesome. I recommend it as a project. I made the modified circuit shown under the original. It is still just a bunch of wires, i dont have a stereo jack or a switch or a box yet. I previously made a fuzz face on a circuit board and it took a long time for me to get it working. This time i didn't use a circuit board i just soldered the components directly together, i found it a lot easier that way, now i just need to attatch it to a piece of board. I wonder what difference using a bc109 has made instead of the transistor shown in the schematic. Whatever, it sounds good.

petemoore

  It sounds to me like you're describing a 'hanging garden' build.
  That'd be where the parts are 'floating' except for being 'interconnected by their own leads to one another [no board].
  Enclosing that ... here I go speculating as I type into unknown territory [generally, the use of a board simplifies reliability.
  Maybe weave cardboard through and glue / clamp / pin that all together with an insulated 'bottom' of sorts which could rest on the inside of a shielded enclosure without touching any connections. I had an "Olson Frizzy Fuzz" which was hanging garden, and was also reliable for a very short time, opens and shorts being a constant irritation to be dealt with by 'bending it just right so it works for a minute' to getting the soldering iron out again.
Convention creates following, following creates convention.

oscar

The problems you explained there are exactly the problems i found when i did use a board, i feel this way the connections are soldered much more securely. I'm sure that circuit boards are probably better for real pros but i'm not a real pro. I think a hanging garden is a good name for it because that's what it looks like. Another advantage i found was that i could lay it out in front of me on the table so it looks just like the schematic, Which makes it really easy for checking things.