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Old 21st February 2005, 09:04 PM   #21
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Quote:
Originally posted by jsteigs
there is some oscillation as well but...that's pretty much what distorion is.
No.
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Old 22nd February 2005, 01:13 AM   #22
troystg is offline troystg  United States
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Quote:
Originally posted by Upupa Epops
Connect resistor cca 2M2 in parallel to diodes.

Hi Pavel-

If that was your only comment I would think his circuit is pretty good?

If it meets with your approval I'll be trying it. :-)
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Old 22nd February 2005, 01:25 AM   #23
avenger is offline avenger  United States
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Hi,
after about an hour fiddling with it I finnaly got it going good. The only thing is some noise, its not hum, its like a high pitch buzz. I have everything grounded?!

The overall sound is awesome, nice rich warm tone, alot better than I expexted, I will next decrease the gain on the second preamp stage because it gets easy overdriven when the volume goes up, but other than that it works great.

One question though is that when I throw the power switch either on or off it makes this really loud click(high pitch), almost like if I was switching the power on or off at really high volume...shoud I get a quenchark cap accross the switch? What do you guys think?

In regard to the 741's....I wasn't picky at all, I just used what I had on hand, I agree that they are old but until I pinpoint any issues on the sound with them I will keep them in...I really like the tone so maybe they are testifying on what Brett said above about they sound characteristics.
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Old 22nd February 2005, 06:26 AM   #24
jsteigs is offline jsteigs  Japan
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Quote:
Originally posted by Upupa Epops
Connect resistor cca 2M2 in parallel to diodes.

thanks for the tip...i'll try it when i have time.


rabstg,
if you are going to build it, play around with the resistor ratio in the first part for different levels of gain. also, try different values for the fixed resistor in front of the gain pot for different ranges of distortion. finally, with the tone controls all set to minimum, the signal is grounded so you might want to try putting a resistor between the mid tone control pot and ground.

by the way, the diodes i used are 1N4148s
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