bypass pop or occasional bleedthrough?

aen · Post by **aen** » Wed Aug 26, 2009 6:51 pm

So I make this HAX pedal, which makes a lot of racket. The problem with it is that in the traditional True Bypass wiring there's occasional blleedthrough from the oscillator/tone generator when bypassed. To remedy this, i tied the power to the chip to the indicator LED, and it pops when you engage.

I chose to go with the popping seeing as most people who use the hax are bedroom rockers or studio noisemakers. But now I've gotten an email about fixing the pop, and i wonder if theres anything else to try, or if occasional blledthrough would be preferable.

Post by **Mike** » Wed Aug 26, 2009 6:56 pm

Use the input grounded scheme, this will solve bleedthrough most probably

I use this for all the pedals I build, it calms the awkward ones down.

aen · Post by **aen** » Wed Aug 26, 2009 6:59 pm

hmm, ill have to try that. I dont have a pic, but my scheme sends the FX output to ground in bypass.

Post by **Mike** » Wed Aug 26, 2009 7:06 pm

Hmm.

Have you tried sticking low value (200-500pF) caps across the pins of the oscillating IC?
Using shielded wire for input and output from jack to switch might help, only ground one end of the shield though.

aen · Post by **aen** » Wed Aug 26, 2009 9:35 pm

nope, might give that a shot too. Keep in mind though, in true dwarfcraft fashion, the chip is being mis-used.

euan · Post by **euan** » Wed Aug 26, 2009 9:46 pm

Ahhh, there is some trick as well to do with a resistor at the input or output to stop pop as well. Cannae remember it.

Markn951 · Post by **Markn951** » Thu Aug 27, 2009 12:24 am

euan wrote:Ahhh, there is some trick as well to do with a resistor at the input or output to stop pop as well. Cannae remember it.

never heard of that before...actually, i'm curious as to WHY the pop happens. I mean, the physical switch has a click and i can understand that but i've never noticed an audible POP coming through the amp...

aen · Post by **aen** » Thu Aug 27, 2009 1:17 am

LOTS of EHX pedals do it. I think in this case it's becasue of the power conecting to the chip?

robert(original) · Post by **robert(original)** » Thu Aug 27, 2009 1:39 am

i have noticed a pop with a few pedals of mine(not dwarfcraft stuff per say) but it was generally with a great volume increase on the pedal itself.
i want to say that my nano bassballs did that, but after about 2 weeks of heavy hitting the popping went away, and it seemed like the switch just needed to broken in.

Post by **Mike** » Thu Aug 27, 2009 8:49 am

The resistor trick is a 1meg pulldown resistor to ground at the input and output.

stewart · Post by **stewart** » Thu Aug 27, 2009 9:01 am

aen wrote:LOTS of EHX pedals do it. I think in this case it's becasue of the power conecting to the chip?

the NYC big muff does it, and you have the added bonus of it buzzing like fuck too.

Post by **Mike** » Thu Aug 27, 2009 9:11 am

And when it's on - it's rubbish.

I hate the NYC Muff.

Post by **Doog** » Thu Aug 27, 2009 9:43 am

I've still got Spud's (your old one) here- plugged it in yesterday. The "bypass" is like turning your treble down to 0. FAIL EHX.

That said, I used it on a Doog album track- with the tone way down, it's pretty usable if you're not switching between clean and furze.

Post by **Mike** » Thu Aug 27, 2009 9:47 am

Yeah it's not tooo bad just ON but I prefer the Green Muff circuit.

The bypass was superwhack, the only thing it was good for was taming overly trebly guitars. I could TB that easily, BTW

Post by **Doog** » Thu Aug 27, 2009 9:55 am

Mike wrote:I could TB that easily, BTW

I was actually thinking about buying it off him, but the Green Muff does sound a lot nicer. And I don't need more distortion pedals, it's getting silly again.

Post by **Mike** » Thu Aug 27, 2009 9:57 am

haha tell me about it. I have amassed a huge amount of builds - it's frigging dumb

Post by **Doog** » Thu Aug 27, 2009 10:18 am

At least you're perfecting a skill and trying new builds and that.

Post by **Mike** » Thu Aug 27, 2009 10:20 am

Yeah, 'suppose, it's just addictive.

- I wonder what a HyperPak sounds like

*solder smoke*

BRANG!

That's what I'm building into the Saltstorm StormTrooper Case, a HyperPak with a new tone control which is bypassable.

aen · Post by **aen** » Thu Aug 27, 2009 2:32 pm

Doog wrote:I've still got Spud's (your old one) here- plugged it in yesterday. The "bypass" is like turning your treble down to 0. FAIL EHX.

That said, I used it on a Doog album track- with the tone way down, it's pretty usable if you're not switching between clean and furze.

Thats so bizarre. Its fucking EASIER to TBP a muff, and at least with the ECT, I didnt get any pops or anyting.

PS what is hyperpack?

bypass pop or occasional bleedthrough?

which would you rather deal with

bypass pop or occasional bleedthrough?