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dave dave is offline
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Default Audio gen for guitar amps ?

On 01/05/2015 03:37 AM, JW wrote:
On Wed, 31 Dec 2014 15:06:00 -0800 (PST) Phil Allison
wrote in Message id:
:


** Function generators are **** awful for audio repair work, the sine wave is full of high order harmonics that get exaggerated by the treble boost in many guitar amp models. Sounds bad through the speaker and looks bad on a scope.


It doesn't meet all your specs, but what about a Keithley 2015? They can
be had for about $500 on Ebay...


Look on the bay for a Heath IG-58 (several variations). They are very
low distortion for the price. (Typically 0.04 to 0.02 % THD, depending
on level and frequency). You can get a guaranteed one for $125 or less.
Or wait for a bargain and grab one for $50. The Elenco with the big
pointer is around 1%. Your smartphone can be used, too. I have not
measured the distortion of such apps.