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Now that we are on this topic which i am glad you guys
brought up:
I also installed a sustainer into a roland ready
fender strat,now i dont have any experience with
electronics but the tech told me that in order to use
the sustainer i have to plug a 1/4 inch plug
dummy(like the one on a guitar cable) on the main
guitar jack if i am using the GK-pickup cable.But it
would be great if they could run through the same
GK-pickup jack output and just switch from synth to
guitar mode and use the sustainer,you think this is
possible putting some kind of switch on the guitar?
cheers
Luis
--- tcombs@sep.com wrote:
> In this case I think it would be risky to even try
> it. The GK pickup does
> not provide it's own power - power, I believe, comes
> from another device
> such as a GR33 or VG-8. In the configuration you
> want to try, the GK
> pickup would merely let power flow through it and
> into the sustainer
> circuit. A hunch tells me that the sustainer
> circuitry requires more
> amperage than the GK does to operate. Thus, I doubt
> the GK power supply
> is rated for powering a GK pickup and a sustainer
> circuit simultaneously.
> If sufficient over current protection is not built
> into the device that
> provides GK power, you could very well burn
> something up not in the GK
> pickup, but whatever device is providing GK power.
>
> Checking amperage is not something you can do simply
> with a multimeter in
> this situation. You'll have to somewhere make a
> break in the wire that
> carries power to the GK pickup and insert the
> multimeter in series with
> the flow of power (when you measure voltage you're
> actually connecting the
> meter in parallel with the circuit under question).
> However, an amperage
> measurement only tells you how much current is being
> drawn by a device -
> it tells you nothing about how much current the
> power supply is capable of
> providing (only the power supply manufacturer can
> tell you that).
>
> If it were me, I'd modify my guitar to make the
> sustainer battery as
> easily accessible as possible, always make sure I
> have a backup battery,
> and teach myself the habit of unplugging the guitar
> when won't be played
> for a long duration. I treat batteries like strings
> - always have a
> backup.
>
> Another option - find a wall wart power supply that
> is capable of powering
> the sustainer circuit, attach a long cable to it,
> put a power connector on
> your guitar, and wail away.
>
> Best of luck,
> Tom
>
>
> > Good point Brian, but would it be risky to "try",
> could i blow something?
> > Checking thru the spec of the GK pickup (that
> would be providing the
> > power) there is no mention of power requirments at
> all, I guess it has "no
> > user servicable parts" therfore no info...
> > (how do i check the amperage anyhow?my simple
> multimeter doesnt seem to
> > have that on it..)
> >
> > Mark
> >
> >
> >
> > Risky...You also have amperage to consider. Will
> the source be able to
> > handle the amperage that the pickup draws?
> >
> > I think your best bet is to contact the
> manufacturer for the specs.
> >
> > Brian
> >
> >
> > ----- Original Message -----
> > From: mark francombe
> > To: loopers-delight@loopers-delight.com
> > Sent: Friday, February 11, 2005 4:33 PM
> > Subject: electronics question for the
> tech-heads.
> >
> >
> > Sorry for Off topic..
> >
> > After a few weeks of completely happy and
> crazy use of my newly
> > installed (and now working, thanks to LD people)
> Fernandes Sustainer
> > pickup, I have for the first time left the damn
> thing plugged in
> > overnight, (battery switch on jack socket
> arrangment) and drained the
> > battery. THIS WILL NOT DO! now I could add a power
> switch to the
> > guitar (but then I would no doubt forget that ..)
> > BUT... I have a cunning plan!!!
> > I also have a GK midi pickup installed on the
> same guitar, and when I
> > poke around with the multimeter at the socket that
> is installed in the
> > guitar that takes the midi to my synth I find a
> pin that seems to have
> > around 7 volts sitting there. The sustainer pickup
> taks a 9 volt
> > battery (but when I test, again with multimeter)
> it also appears to be
> > around 7 volts.
> >
> > Now it doesnt take an idiot to realise what
> I'm suggesting. I would
> > like to take the power from the GK midi pickup
> cable and connect it to
> > the sustainer. Which I would have tried already,
> but for one little
> > prob.
> >
> > If I check voltage on the battery with
> multimeter connected with BLACK
> > cable to ground and RED cable to battery.. 7
> volts. When I do the same
> > on this mysterious power wire inside the GK
> connector, the multimeter
> > trys to swing the wrong way, I reverse the multi
> meter leads, and then
> > I get this reading of 7 volts.
> > Does this mean that the GK pickup is infact
> powered by -(minus) 7
> > volts? ( I've never really understood the concept
> of negative volts Im
> > afraid..) SO.. either I cant use this power, OR I
> must reverse the
> > polarity of it???
> >
> > Is this possible?
> >
> > Wise?
> >
> > Foolish?
> >
> > Help?
> >
> >
> >
> >
> > Mark
> >
> >
> >
> > mark francombe
> > www.markfrancombe.com
> >
> >
> >
> >
>
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=====
www.luis-angulo.com
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