Re: [CAD_CAM_EDM_DRO] small amp recommendation needed

>
> The most obvious is a Copley Controls DC servo amplifier. See
> http://www.copleycontrols.com/
> OR, he could build one of my velocity servo amps
> http://pico-systems.com/servo.html
> but, the Copley comes completed for about the same price as my
> kit costs to build!

Jon,

Thanks for the tip on Copley - we will look into that.

> Audio amps are totally unsuited for this. I assume he is pulling out any
> DC coupling capacitors, or any caps in the feedback that reduce gain
> below a few Hz. Most amps have this to prevent shoving a lot of DC
> through the speakers.

Actually, he wasn't modifying the audio amps at all as the kind of
frequencies he wanted to use were within the audible range.

Chris

--
Christopher C. Stratton, stratton@...
Instrument Maker, Horn Player & Engineer
22 Adrian Street, Somerville, MA 02143
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