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:  

Inductors in series for wah


 
6/1/1999 6:25 PM
Pascal
email
Inductors in series for wah
I`m using 150 mH inductors in series for my homemade wah to get the 500 mH value required, but the tone of my wah (vox clone) seems O.K. clean but when used in front of a cranked amp or OD pedal lacks "wah-wah" and high end in the distortion... should I tweak caps some more or is the inductor to blame, how about transistors, I`m using MPS-18's... (yes I have moved the pot around on the pignon)...
 
6/2/1999 7:01 AM
R.G.
Website
email

I've used the trick of putting several inductors in series, works OK.  
 
I don't think the inductors are the problem. Have you tried a commercial wah to see how it responds in the same setup? Wah in front of a distortion does not sound the same as a wah after the distortion - it mostly selects which frequencies will be distorted rather than making a wah in this setup.
 
 
  Tuesday
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.
 
6/2/1999 9:40 AM
gfr
Website
email

I prefer the tone of the wha before the distortion. When the wha is after the distortion the "WWWH" portion of of the sweep tends to be quieter then the "HAAA" part. The distortion helps to keep levels ballanced.  
 
BUT... This works with low to mid amounts of overdrive. If you are using ultra-high gain the wha effect is dominated by the huge amount of distortion and just disappears. There's a simple test to know if you have too much distortion: if when you change from the bridge pickup to the neck pickup the tone changes too little, you've got too much distortion.  
 
A common problem with classic whas is that they don't work properly before fx or amps with low input impedance. For example a Vox before a stock FF presents some problems (you can cure this with a resistor/pot in series with the FF input like the Fuller mod).
 
   Page 1 of 1