RE: Question about Audio Reg Board -5v

The -5v supply goes to the LM324 Amp in the audio output section of the
board. I guess in this case it doesn't really need to be regulated?

http://rossiters.com/audio-output.html

Matt

On Tue, 1 Jul 2008 10:18:41 -0400, "Alex Yeckley"
<ayeckley@elektronforge.com> wrote:
> Some versions of the 7905 fall badly out of regulation under no-load
> conditions. I think the ones that Bob Roberts was selling at one point
> fell
> into that category. I've seen such 7905's put out -12V under no-load.
>
> Alex
>
> -----Original Message-----
> From: owner-rasterlist@vectorlist.org
> [mailto:owner-rasterlist@vectorlist.org] On Behalf Of Christopher X.
> Candreva
> Sent: Tuesday, July 01, 2008 10:12 AM
> To: Rasterlist
> Subject: Re: RASTER: Question about Audio Reg Board -5v
>
> On Mon, 30 Jun 2008, Matt Rossiter wrote:
>
>> be fine. I replaced the 7905 voltage regulator. Then I swapped in
>> another audio Reg board and got the same thing. Why would I be
>> getting -12v instead of -5v? It almost seems like this is normal.
>
> Are you sure you are measuring the correct line ? Try the direct output
of
>
> the reg, the test point (if there is one). My guess is you are on the
> -12v
> line.
>
> ==========================================================
> Chris Candreva -- chris@westnet.com -- (914) 948-3162
> WestNet Internet Services of Westchester
> http://www.westnet.com/
>
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Received on Tue Jul 1 12:03:31 2008