Messages

BTW - I should say thanks to David Rolo for coming up with the Hogweed and making the schematic available. I thought it might make this thread a bit more interesting if I showed you what my clone looked like. :-)

Hi Phil,
Not sure how those isolator blocks from irig work, but I would assume it uses a DC/DC converter and its switching frequency might not play well with this pedal.

Try a 1n cap across the collector and base of T1.Or from base to ground, see which works best, you might need to try a few values. I actually found that shaving some of the hi end off helped with the octave being more prominent.

Hi David, Thanks for taking time to offer help, much appreciated. :-) I'll try your suggestion.

Well, the noise only happens if the Octave switch is on and the Octave Up pot turned high, so something's happening on this part of the circuit. Noise is worse if other pedals are before it on the chain.

maybe a couple of 100n caps going from 9V to ground may quieten it

Good call. I added one 100nF poly cap right across 9v+ and ground at the power socket and that reduced the noise a lot. There's still some noise, but it's tamed it.

Dammit, I might be wrong about that. Still getting noise even with a separate power supply and plenty of juice. Reckon it doesn't like being in a pedal chain either.

OK, I think I have the answer.

The current from a GigRig Isolator is about 130mA. I tried it with a power supply from a GigRig TimeLord and directly from a GigRig Distributor (bot options supply a lot more current) and there is no power noise when the octave switch is on.

So, my question now is - how much current do you think this pedal pulls when the octave switch is engaged?

I built a Giant Hogweed clone:

http://tagboardeffects.blogspot.com/2015/10/giant-hogweed.html
http://www.davidrolo.com/wp-content/uploads/2017/07/GiantHogweedSchematic_zps445f5a36.png

I use a modular GigRig power system with Isolators and when I have the Hogweed powered on my board with an Isolator, and the Octave button on the pedal is on, I get high pitched whistling noises.

However, if I use a completely separate power supply there is no noise from the pedal.

The GigRig system is supposed to supply isolated 9v through an isolator and yet this is happening.

Any ideas?

I think the biggest factor that pulls me back to doing my own powder coating is the color selection and effects.  Transparency, glitter, holographic flicks, anodized, textured, flat, chrome, illusion, rainbow (flick)... they look awesome...

I think i need to order some new powders

So, a bit better than Tayda's enclosures, then? ;-)

Philtre

Thanks, inkjet clear sticker film with an extra sheet stuck over the printing for protection.

Interesting. How durable is the sticker film using this approach?

It seems fine as there are hex bolts holding down the brass as well as the pots keeping everything together. I know that Devi Ever also used this method (with Papillo paper) on her pedals

I tried it today, and it works great. Goodbye Envirotex! :-)

Been a while since we had a powder coating thread

Or an Armadillo thread.

So im just wondering what everyone's expectations are as far as bought powder coated enclosures and whether i'm just the eternal perfectionist.  To me, unless it looks like a commerical product (ie, impossible to do in a garage), i'm not 100% happy.

Also are you guys still PC'ing your own or do you buy them?  its a big mess and time consuming, so i certainly understand if you buy them!

I've bought a load from Tayda. They're OK, and they have a good variety of colours. How do yours compare to Tayda's?

Thanks, inkjet clear sticker film with an extra sheet stuck over the printing for protection.

Interesting. How durable is the sticker film using this approach?

That's pretty neat.  What do armidillo's eat?  plants and bugs?

90+% insect based, supplemented with the occasional egg, lizard, frog, or baby mouse if they happen across them. Very little vegetable matter.

Well, I recently built a modified Fuzz Factory clone and called it the "Fuzzadillo".

Excellent   Fun fact, the common armadillo of North America (9-banded, as seen above) cannot roll into a ball. Only the 3-banded Armadillos of South America have that particular trick (Your graphic is biologically accurate!).



....Not entirely sure how this thread got side tracked into Armadillo Facts, but ok!

Well, that's good to know although I can't take credit for the dillo graphic as I found it on Google search.

Well, I recently built a modified Fuzz Factory clone and called it the "Fuzzadillo".

I did an experiment. I built a RAT clone (http://tagboardeffects.blogspot.com/2012/01/proco-rat.html) and ordered some LM301s from Tayda and tried the following:

- OP07 (no compensation cap)
- LM301 with 100pf compensation cap
- LM301 with 33pf compensation cap

I know it's subjective but, for me, the last option won. Sounded a bit grittier.

(BTW - the Tayda LM301s are genuine as they squeal like a pig without the cap unlike the "LM308" I bought off eBay which was a repainted OP07)

Thanks for that info, redderset, very informative. :-)

For my own part I've tried an OP07 and an LM741 and, to me ears, there's very little in it. I might try a LM301 at some point but I'm fast coming to the conclusion that it's just not worth the bother fretting over this, and just bung in an OP07 without a compensation cap and be done with it. I believe that modern Rats use them.