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. . . or when using an oscillating transistor, would slow down the oscillation or exaggerate it?

more information needed, what do you mean slow down? are you talking about a delay line?

If you wanna sweep the freq a pot will do just fine. It's a resistor that allows a range. Are you referencing your bazz?

Bellyheart wrote:If you wanna sweep the freq a pot will do just fine. It's a resistor that allows a range. Are you referencing your bazz?

I am actually. Before I solder it all up complete, I want to either make the sweep more noticeable or deeper. Either one will be fine. I tried a 1k pot on the ground source wire didn't change anything - well nothing for the better. It made it sound harsh and 'tinny' increasing the top end without any sweep. adjusting the pot had no influence. It so I tried placing it between the emitter resistor and the ground and same thing: harsh and no sweep. So what i was wondering if possible to (one or the other or both) is there a way, or component that would speed up/slow down the sweep or affect the depth of the sweep. Otherwise I will just solder what I have, give it a foot switch, an LED, and throw it in an enclosure.

Can you post a sketch of the actual circuit?

Can you post a sketch of the actual circuit?

Nocentelli wrote:Can you post a sketch of the actual circuit?

I can do better than that. Here is a photo of the breadboard. I know the solder joints on the jacks are in the wrong place, but they are only for breadboarding. I was attempting the Bazz Fuss, it was unsuccessful so i swapped a few parts. The resulting sound was a boosted tube amp through a semi slow Leslie cabinet.

I was thinking schematic or circuit diagram, I can't read all the connections or values from the picture.

Oh. That makes sense. I will draw up an actual schematic.
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Nocentelli wrote:I was thinking schematic or circuit diagram, I can't read all the connections or values from the picture.

Im drawing it up, just not as easy as it was when I was a kid. Ironic huh? I used to whip this stuff out like nothing. I guess its like riding a bike. But yeah I definitely want to know from those that have been doing this longer than me how to make what I have better or how to do it better next time.

Nocentelli wrote:I was thinking schematic or circuit diagram, I can't read all the connections or values from the picture.

Okay here it is. It has been a while since I've drawn up a schematic. C1 and C2 are vintage ceramic discs about the size of a US Nickel and after some research I am pretty sure I got their values right.

The code on the ceramic disc caps read:

Y S U
1 0 3 M
2 K V
KCK

el badger wrote:

Nocentelli wrote:I was thinking schematic or circuit diagram, I can't read all the connections or values from the picture.

Okay here it is. It has been a while since I've drawn up a schematic. C1 and C2 are vintage ceramic discs about the size of a US Nickel and after some research I am pretty sure I got their values right.

The code on the ceramic disc caps read:

Y S U
1 0 3 M
2 K V
KCK

Ughhh

Did you actually draw that right? That's just weird. One of the diodes which connects directly to your +9V is forward biased directly to GND... Did you notice one getting hot? (I'm surprised it didn't blow.) There's also no DC blocking cap on the output. Luckily your amp will have one so it will still work but as soon as you add a bypass switch it's gonna pop like crazy.

Any sound you are hearing is probably just your power supply dying, that diode is just like a short to ground. Can you actually hear any guitar?

Most oscillators work by charging then discharging a cap. You adjust the frequency by controlling the time it takes to charge this cap. You can use a pot to control the charging current, increasing the resistance will reduce the charging current meaning it takes longer to charge up and so a lower frequency etc.. You can also up the size in the capacitor it will work the same as above.

There's ICs that will give you an oscillator, NE555, CD4047 etc. You can build one out of op amps or transistors too..

Or.. If you just want to mess around and make some weird shit that oscillates when you do just remember the bigger the cap - lower frequency(Takes longer to charge up). You've just got to find the tight one though

mysteriousj wrote:

el badger wrote:

Nocentelli wrote:I was thinking schematic or circuit diagram, I can't read all the connections or values from the picture.

Okay here it is. It has been a while since I've drawn up a schematic. C1 and C2 are vintage ceramic discs about the size of a US Nickel and after some research I am pretty sure I got their values right.

The code on the ceramic disc caps read:

Y S U
1 0 3 M
2 K V
KCK

Ughhh

Did you actually draw that right? That's just weird. One of the diodes which connects directly to your +9V is forward biased directly to GND... Did you notice one getting hot? (I'm surprised it didn't blow.) There's also no DC blocking cap on the output. Luckily your amp will have one so it will still work but as soon as you add a bypass switch it's gonna pop like crazy.

Any sound you are hearing is probably just your power supply dying, that diode is just like a short to ground. Can you actually hear any guitar?

Most oscillators work by charging then discharging a cap. You adjust the frequency by controlling the time it takes to charge this cap. You can use a pot to control the charging current, increasing the resistance will reduce the charging current meaning it takes longer to charge up and so a lower frequency etc.. You can also up the size in the capacitor it will work the same as above.

There's ICs that will give you an oscillator, NE555, CD4047 etc. You can build one out of op amps or transistors too..

Or.. If you just want to mess around and make some weird shit that oscillates when you do just remember the bigger the cap - lower frequency(Takes longer to charge up). You've just got to find the tight one though

I went back and verified, the drawing is spot on but no heat from the diodes. I don't know if it is killing the battery though. It sounds great though. I just wanted to know if it was possible to bring out the sweep more. It might be better to not solder it up just yet, shelve this one and start fresh. If it is a mess, I wouldn't know unless I was told like I just was. Thank you for checking it out. Last thing I want is to catch the carpet on fire.