Re: Hoffman DRRI Conversion Low Volume - Magic Amp!

On Thu, 2 Oct 2008 09:01:04 -0500, "Stephen Cowell"
<scowell@xxxxxxxxxxxxx> wrote:


"JP" <JP@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:60k9e4lei51cdceppd40m9tvfmghil84tp@xxxxxxxxxx
On Wed, 1 Oct 2008 18:46:39 -0500, "Stephen Cowell"
<scowell@xxxxxxxxxxxxx> wrote:


"JP" <JP@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:pun7e4l004q876ofn7dtgo96a1pn7rgqts@xxxxxxxxxx
Started back on the DRRI today, hooked up the scope to the

What exactly is our problem today?
__
Steve
.

RS says it is parasitics...any suggestions? I'll be turning off the
puter for a week after today but will be back with it then...

If it's parasitics then you'd see it on the scope... creamy white
wide trace.

Steve, From JP's original post:

Then, I tuned in the scope and noticed that I had an
increase in output when I moved my hand over the
chassis over the V1 and V2 area.

Not sure what else could cause that. I read that as being guitar
signal, but if it's just increase in hum level, I suppose it could be
a floating grid. Doesn't sound as likely.

JP: If all else fails, draw a new schematic by tracing the wiring.
Assume nothing--do it like you were reverse engineering someone else's
design. There's got to be at least one wrong connection.

.

Relevant Pages

  • Re: Hoffman DRRI Conversion Low Volume - Magic Amp!
    ... I'll be turning off the ... puter for a week after today but will be back with it then... ... signal, but if it's just increase in hum level, I suppose it could be ... a floating grid. ...
    (alt.guitar.amps)
  • Re: Hoffman DRRI Conversion Low Volume - Magic Amp!
    ... I'll be turning off the ... puter for a week after today but will be back with it then... ... signal, but if it's just increase in hum level, I suppose it could be ... a guitar, or oscillator, connected. ...
    (alt.guitar.amps)
  • Re: Hoffman DRRI Conversion Low Volume - Magic Amp!
    ... I'll be turning off the ... puter for a week after today but will be back with it then... ... signal, but if it's just increase in hum level, I suppose it could be ... a guitar, or oscillator, connected. ...
    (alt.guitar.amps)
  • Re: Hoffman DRRI Conversion Low Volume - Magic Amp!
    ... I'll be turning off the ... puter for a week after today but will be back with it then... ... this points to a guitar or connecting cord ...
    (alt.guitar.amps)
  • Re: O/T, but somewhat germane to us in general
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