Re: More noise question


Sacramento Dave wrote in message
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"bg" <bg@xxxxxxxxxx> wrote in message
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Sacramento Dave wrote in message ...

"Jim" <askme@xxxxxxxxxxxxxxxxx> wrote in message
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bg wrote:

What is a Derect Box ? Do have link for one? I am going to have him
check
out the Amp If anything is wrong he will fix it plus it's about a
twenty
minute drive. I have tried many chords and bought some new ones .
Someone
else said to try a Hum X
http://www.musiciansbuy.com/Ebtech-HUM-X-Hum-Exterminator-HUMX.html.

Anyway

Thanks Lulu


If your amp has noise with nothing plugged in, a direct box isn't
going
to
help. Try plugging in a shorted guitar jack (just the jack, with no
cable
attached). turn up your volumes and tones to whatever is normal for
you.
Does it still buzz?


He's got two amps plugged into one delay, causing a ground loop.

I still get noise in the one amp in any situation so I think that will
be
the first problem to fix. Then I might buy one of the HUMX devices or
something like it there not a lot $$$ . At any rate I don't need it but I
do. I had some problems with my deja vibe going out to two Amps .
Fulltones
advice was to plug it into a ungrounded source not the best advice from a
manufacturer but I did because I don't care and it did help. Now reading
about the HUMX it's says it lifts the ground but it's still grounded kind
of
like saying yes and no.


Keith makes a good point, that if changing the tube worked last time , it
might work again. I used to have an amp that had a polarity switch. What
this did, was reverse the power connections to the power transformer. It
worked the same as if you reversed the power cord in the outlet. With a
polarized plug or a three prong plug, you can't do that, so the switch
did
it for you. It made a huge difference in getting rid of buzzing noises,
but
it also made a difference in how much AC was on the chassis.
As far as a ground loop between the two amps, this happens because the
amp's
chassis are grounded to each other thru your effects pedal. The only way
you
can break that ground connection is by using transformers. Some direct
boxes
use transformers, some don't. What you need is a transformer based
splitter.

If you read my first post evedently keith did not that's the first
thing
I did change the tube. The buzz came back in just a couple hours of
playing. I guess there is a chance the new tube was faluty so at this point
I'll have the builder check it out no cost to me 20 minute drive. The amp
dose not have a revers polarity plug , they seem to be doing away with them
I always liked them. I will have to check out a tranformer based splitter.
Can you recommend one? It always seems with two amps there is some sort of
unwanted noise maybe the splitter will work. Thanks for the info

Yes I did read the post, but I tend to miss alot!
A very commonly used transformer, is called an isolation, or a 1 to 1
transformer. It's sole pupose is to connect two pieces of equipment together
without having to connect the grounds of the equipment together. Seeing as
you want to connect three pieces together, a 1 to 1 to 1 (three windings)
will also work.
Contact Jensen Transformers at their website, and see if they have a box
that will drive two amps from one pedal. I'm sure they do. Their
transformers are pro quality so don't expect Radio Shack prices.
bg

.

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