ampage
Tube Amps / Music Electronics
For current discussions, please visit Music Electronics Forum. New: view Recent Searches.
New: visit Schematic Hell!
The sunn still shines online!

 
Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

Search for:  Mode:  

Re: Wah pedal circuits


 
8/31/1998 8:51 AM
paul perry
email
Re: Wah pedal circuits
Keep us posted on the pedal casting! Even zinc casting is far beyond my experience, let alone aluminium... kids, don't try this at home ;-)  
Seriously, i thought this would be a very tricky and expensive undertaking.. how hard is it?
 
9/4/1998 8:30 PM
Hamish
email

To cast things in aluminium is remarkably  
easy (though I have not tried it yet). You need:  
 
Some firebricks/clay  
Some sand/clay/stuff for casting in  
Suitable containers (small metal drum/rubbish bin)  
Charcoal  
Hairdryer or similar air blower/fan  
A crucible (suitable steel container for  
molten aluminium)  
Something to use as a pattern/template  
Some raw material (e.g. old pistons from  
auto scrap yard)  
Not much else apart from safety equipment  
and practice  
 
You can get set up for tens of dollars  
and do it at home. Do a web search for  
"gingery" to find out more about the  
author of a good book about this process.  
 
It is well within the reach of anyone with  
a stove to cast small emblems, e.g. Vox  
or Fender logos using silicone rubber as  
a mould, and appropriate zinc alloy (I think)  
from craft stores. It melts within the heat  
range of a typical stove top. The local  
library is likely to have more information  
on this.
 
 
  Saturday
Book Of The Day The Ultimate Tone, Volume III by Kevin O'Connor
Have you ever wondered if there is a better way to build a Bassman, Champ, Plexi, an 800, AC-30, Bulldog or Portaflex? Or you wanted to build an SVT with off-the-shelf parts? How about a master-volume amp that doesn’t change tone with the master setting? Everything you need to know is right here, including: proper grounding techniques, wiring methods, and mechanical considerations. Eighteen chapters cover the “iconic” amps everyone knows and loves, with schematics and layouts for each, along with the technical history of the product. Eyelet-board and chassis-mounted tube socket construction is used throughout, for easy servicing and modding. TUT3 is very accessible even if you cannot fully read a schematic and is a "must have" if you are going to build an amp for your self.

Note: The Ampage Archive is an Amazon Associate site. A small commission is paid to the site owner on any qualified purchase made after clicking an associate link such as the one above.
 
9/5/1998 6:09 PM
anonymous
As I recall, I think that Micromark sells some casting supplies including low temp metal alloys.  
 
http://www.micromark.com/
 
9/7/1998 11:44 AM
R.G.
I've always been tempted by DIY casting but always found a way around it.  
 
It's very interesting to think about casting, but any misstep in the process causes incredibly dangerous burns. People do do this, though.  
 
Seriously, the best way to get a way pedal shell is to find a dead crybaby. I just got a cardboard box full of dead crybaby wah cases from my friend the amp tech.
 
9/8/1998 5:56 PM
Hamish
email

A box of dead wahs. Here in New Zealand,  
the average guitarist* seems to be poorer  
and dumber than anywhere else. The brand  
name Peavey is highly regarded and is often at  
the top of the range available in the shops above the no brand  
far-East rubbish. A dead Crybaby wah would  
probably get sold for $100. FWIW a Boss  
Metal Zone is hot property, as are those  
shitty low end tweed Fender amps they sell  
these days.  
 
*case in point: I know a guy who traded his  
solid state Crate guitar amp for this other  
guy's crappy old valve amp. An early-60s  
Vox AC30.  
 
Anyway, the point is, it might be a long  
time before an actual Crybaby wah came  
up for sale, working or not. Casting  
is no biggie as I already have plenty of  
safety gear from welding. A leather apron,  
leather boots, and always having someone  
else around are about 90% of what you need.  
I would say the risks are less than playing  
with KT88 circuitry because at least with  
molten metal, you can see that it's there.  
One alternative is to pay an artist's  
collective or similar group to do it for you.
 
9/9/1998 9:16 AM
paul perry
email

Hamish, when you said:  
"case in point: I know a guy who traded his  
solid state Crate guitar amp for this other  
guy's crappy old valve amp. An early-60s  
Vox AC30."  
which was the 'poor' guitarist and which was the 'dumb' one? ;-)
 
9/9/1998 6:37 PM
Hamish
email

>>>  
Hamish, when you said:  
"case in point: I know a guy who traded his  
solid state Crate guitar amp for this other  
guy's crappy old valve amp. An early-60s  
Vox AC30."  
which was the 'poor' guitarist and which was the 'dumb' one? ;-)  
<<<  
 
Well, it's hard to say. The guy had the  
control panel drilled for a standby switch  
right after getting hold of it, and  
scratched his name onto it. At the same time  
he had the vib-trem channeld disabled.  
 
Relevant part: I built Stellan's (sp?)  
wah circuit but I can't get it to work  
properly. I have checked my veroboard layout  
a few times with no luck. It sort-of wahs,  
but breaks into feedback/oscillation  
right about when something interesting is  
starting to happen. I'm about to give  
up (again) and try the kitset "no moving parts" hall effect sensor wah.
 
<<First Page<Prev Page 2 of 3 Next> Last Page>>