What do the resistors in this circuit do?

timhulio · Post by **timhulio** » Tue Jul 15, 2008 8:48 am

I'm building a simple A/Y box similar to this to combine the output from two sources to go into one amp. Do I need to worry about these resistors for this purpose?

Post by **Mike** » Tue Jul 15, 2008 8:49 am

The 1k5 is limiting the current to the LEDs. If you want the LEDs yes you need it.

The others stop a "pop" noise when you click the footswitch.

I would definitely drop the 20p to do it properly.

Post by **Doog** » Tue Jul 15, 2008 8:54 am

Mike wrote: I would definitely drop the 20p

hahaha

Post by **Mike** » Tue Jul 15, 2008 8:59 am

Is that a bum sex reference?

Post by **Doog** » Tue Jul 15, 2008 9:00 am

HAHA, no, I just found it funny.

Filthy boy.

Post by **Mike** » Tue Jul 15, 2008 9:01 am

haha.. fair play.

Given that the 3PDT is going to cost around Â£5 you might aswell tack all the other components onto the order from SmallBear or whatever.

timhulio · Post by **timhulio** » Tue Jul 15, 2008 9:07 am

I'll pop into maplin. Why do they write 1k5 and not 1.5k? That's what it means, isn't it? I also bought an MXR dist+ kit to go in my old MXR dist+ box instead of Yunn's diarhoeaa fuzz.

Post by **Mike** » Tue Jul 15, 2008 9:10 am

timhulio wrote:I'll pop into maplin. Why do they write 1k5 and not 1.5k? That's what it means, isn't it? I also bought an MXR dist+ kit to go in my old MXR dist+ box instead of Yunn's diarhoeaa fuzz.

Because a . is hard to see on a schematic or Printed Circuit Board layout.

Post by **Mike** » Tue Jul 15, 2008 9:12 am

timhulio wrote:I also bought an MXR dist+ kit to go in my old MXR dist+ box instead of Yunn's diarhoeaa fuzz.

Nice. You're becoming a bigger man.

timhulio · Post by **timhulio** » Tue Jul 15, 2008 9:12 am

Now it all makes sense. Thanks Mike!

Post by **Mike** » Tue Jul 15, 2008 9:12 am

No worries, anytime.

Post by **Doog** » Tue Jul 15, 2008 9:13 am

Mike wrote:
timhulio wrote:I'll pop into maplin. Why do they write 1k5 and not 1.5k? That's what it means, isn't it? I also bought an MXR dist+ kit to go in my old MXR dist+ box instead of Yunn's diarhoeaa fuzz.
Because a . is hard to see on a schematic or Printed Circuit Board layout.

Ahhh, never knew that. THNKS 4 THA SCIENCZ, PROFESSOR MIKE!

What is Yunn's fuzz like, apart from loose and uncomfortable?

Post by **Mike** » Tue Jul 15, 2008 9:16 am

It's also from the olden days when all this stuff used to be photocopied and screenprinted etc. The dots would get lost in time and lead to badness.

The difference between 1.5K and 15K is pretty large.

timhulio · Post by **timhulio** » Tue Jul 15, 2008 9:29 am

Doog wrote:What is Yunn's fuzz like, apart from loose and uncomfortable?

It really badly woolys-up your sound when the pedal is off, but turned on it's actually not terrible. The volume is way too high, but it does a kind of glitchy oscillation when you're not playing, and a typical superfuzz when you do, but with unpredicatable decay. None of this, I'm sure, was intentional.

Post by **Mike** » Tue Jul 15, 2008 9:43 am

He fucked up the bypass? If it's got a 3PDT then Yun is more special than I ever thought.

I saw his "Rocket Booster" schematic on DIYstompboxes the other day: ROLF.