Tube Amps / Music Electronics
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|12/21/1999 7:40 PM|
OK, it's the Small Tweed #2 based on a 1960 Champ. This should be SE.
A tube direct box is not necessarilly SE. You can build a tube direct box with ballanced circuitry (differential pairs) and this would clip symmetrically.
I guess that another model in which the assimetry should be fairly obvious is the Soldano X88 (Modern High Gain from the front panel). It's a preamplifier (no power section) and it's designed to emphasize the even harmonics.
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|12/21/1999 7:41 PM|
Ah, and the Fuzz Face should be very assimetric.
|12/21/1999 8:42 PM|
The waveforms on the Soldano and Fuzz Face are both
so crazy it's hard to tell for sure, but they each
appear to be symmetrical to my eye.
|12/21/1999 11:05 PM|
I will be picking up a POD next week. I will do some quantitative analysis and write up something with waveform and spectrum plots. But I don't have a web site... Would anyone like to post it? I guess I could look into the free web sites.
|12/21/1999 11:58 PM|
>>I will do some quantitative analysis and write up something with waveform and spectrum plots. But I don't have a web site... Would anyone like to post it?
I'll be glad to post your work in my free info area if you would like.
|12/19/1999 2:43 PM|
Here's an idea for someone with a POD to try:
If you have a TS type circuit such as my Son of Screamer, you can remove one of the diode clippers so that the signal is only half-wave clipped. This will introduce lots of even harmonics. I might even suggest only using 1 Ge diode as a clipper in the feedback loop of the first opamp.
Drive the POD with this signal (tone control neutral), and see if it improves the amp-like sound of the POD.
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