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Old 31st January 2008, 03:47 PM   #1
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Default low distortion sweep generator - not a PC

Hey all, I have read various threads, searched the net and routed through eBay, and I cannot seem to find what I am looking for.

I build guitar amps and am constantly using narrow sweeps to help tune parts of the circuit. I use a PC now, but it is a royal PIA.

Does anyone make a purpose built audio sweep generator that has:

- 10Hz-20kHz
- narrow sweeps (2kHz from 1-20seconds)
- low sine distortion <.01%
- in its own little box?

thanks for the help
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Old 31st January 2008, 04:04 PM   #2
kevinkr is offline kevinkr  United States
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Some of the older wavetek stuff might work or could be modified to suit. For this sort of application I wouldn't think low thd would be majorly important if you are just looking at filter tuning and the like.
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
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Old 31st January 2008, 04:49 PM   #3
Yvesm is offline Yvesm  France
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I use white noise and averaged spectrum display
So you can see the effects of tweaking in "near" real time.

Beware to do not overload the Device Under Test, white noise has peaks at full level while average is about 40dB down.

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Old 31st January 2008, 05:16 PM   #4
jcx is offline jcx  United States
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test tones can be created as .wav and stored/played on any digital player - convience is only limited by the player user interface

iPod/DAP or even a desktop CD/DVD/universal player with a remote shouldn't be too cumbersome
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Old 31st January 2008, 05:25 PM   #5
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Thanks folks, I will give those techniques a shot.

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Old 31st January 2008, 09:28 PM   #6
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Tek SG505.

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Old 31st January 2008, 09:33 PM   #7
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Create (or download) the tones / sweeps that you need on a PC. Save them in WAV format. Use Windows Media Player 11 to burn them to an audio CD. Use a CD player as your source.
Tubelab, it's 5 year mission. To explore strange new tubes, to seek out new circuits and topologies, to boldly go where no tube has gone before......
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Old 31st January 2008, 09:45 PM   #8
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Hey jh, the SG505 is good for low distortion, but does not help me in the sweep category. Unless there is some option for it?
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