Home Audio Question

[Guest]

Archived from groups: rec.audio.pro (More info?)

Hoping one of you audiophiles can help me with this one:

I have a good quality Yamaha surround home system. When I had it
plugged in through my older Hitachi 27" tv set, I could turn on the tv
no problem.

Now that I have it hooked through my roommate's 32" Zenith tv, when I
turn on the tv or turn it off (his Zenith) there is a loud POP! that
comes out of all the speakers, and I know that's not good for the
speakers. What might be causing that? Is there something I can do to
fix that?

I also notice the speakes crackle when the furnace turns on our off as
well. Argh!


thanks!

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

> skydigger123@hotmail.com
>Date: 9/19/04 9:09 PM Eastern Daylight Time
>Message-id: <9dbsk01o5glrvgb40p5rlvelkbbohr3ffj@4ax.com>
>
>Hoping one of you audiophiles can help me with this one:
>
>I have a good quality Yamaha surround home system. When I had it
>plugged in through my older Hitachi 27" tv set, I could turn on the tv
>no problem.
>
>Now that I have it hooked through my roommate's 32" Zenith tv, when I
>turn on the tv or turn it off (his Zenith) there is a loud POP! that
>comes out of all the speakers, and I know that's not good for the
>speakers. What might be causing that? Is there something I can do to
>fix that?
>
>I also notice the speakes crackle when the furnace turns on our off as
>well. Argh!
>

Well, we are mostly recording studio guys but this sounds like a ground issue.
Try plugging into a different AC outlet? Tried a power conditioner (not sure if
that will help or not)? You can hirer a contractor (electrical) to come in and
run a dedicated outlet for you.

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

bruwhaha58097238@aol.com (Raymond) wrote in message news:<20040919234620.03961.00004022@mb-m19.aol.com>...
> > skydigger123@hotmail.com
> >Date: 9/19/04 9:09 PM Eastern Daylight Time
> >Message-id: <9dbsk01o5glrvgb40p5rlvelkbbohr3ffj@4ax.com>
> >
> >Hoping one of you audiophiles can help me with this one:
> >
> >I have a good quality Yamaha surround home system. When I had it
> >plugged in through my older Hitachi 27" tv set, I could turn on the tv
> >no problem.
> >
> >Now that I have it hooked through my roommate's 32" Zenith tv, when I
> >turn on the tv or turn it off (his Zenith) there is a loud POP! that
> >comes out of all the speakers, and I know that's not good for the
> >speakers. What might be causing that? Is there something I can do to
> >fix that?
> >
> >I also notice the speakes crackle when the furnace turns on our off as
> >well. Argh!
> >
>
> Well, we are mostly recording studio guys but this sounds like a ground issue.
> Try plugging into a different AC outlet? Tried a power conditioner (not sure if
> that will help or not)? You can hirer a contractor (electrical) to come in and
> run a dedicated outlet for you.

I agree it's a power issue. You may be running close to capacity for
amperage on the circuit that you are using for the stereo. When you
turn on the TV, the initial "short" presented by the power supply
transformer in the TV momentarity presents a power spike (back EMF)
just after.., and therefore a spike goes onto the power line and then
through your stereo.

A power conditioner for the stereo should help, but don't get a cheap
one. Also, I'd suggest running the TV off a different circuit. It may
be worth having a dedicated circuit installed just for the stereo.

Karl Winkler
Lectrosonics, Inc.
http://www.lectrosonics.com

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

Karl Winkler <karlwinkler66@yahoo.com> wrote:
>I agree it's a power issue. You may be running close to capacity for
>amperage on the circuit that you are using for the stereo. When you
>turn on the TV, the initial "short" presented by the power supply
>transformer in the TV momentarity presents a power spike (back EMF)
>just after.., and therefore a spike goes onto the power line and then
>through your stereo.

Umm... how is the stereo hooked up to the TV set anyway?

Is it plugged into something with a lot of DC offset?
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

Hey Guys,
Thanks for the ideas so far. I've ran an extension cord to other
rooms for the tv, no change. But, when I moved in here, I noticed
that on a wall receptacle there are the normal 2 vertial plugs, but
the screw in the middle had a bit of wire wrapped around it. Wonder
if the previous home owner used that as a ground? On the back of my
Yamaha receiver I have a GND terminal, just a little knobby thing I
can unscrew and pinch in some wire. In the manual it says it's for
turntable use, then later on says "connect to a good earth round like
a metal stake driven into moist earth".

Hmm so how do I create a round, do I just run a piece of wire from
that GND terminal on my Yamaha receiver to something? Forgive my
ignorance, I'm not an electronics guy at all.

Thanks muchly!
S.

On 20 Sep 2004 08:23:32 -0700, karlwinkler66@yahoo.com (Karl Winkler)
wrote:

>bruwhaha58097238@aol.com (Raymond) wrote in message news:<20040919234620.03961.00004022@mb-m19.aol.com>...
>> > skydigger123@hotmail.com
>> >Date: 9/19/04 9:09 PM Eastern Daylight Time
>> >Message-id: <9dbsk01o5glrvgb40p5rlvelkbbohr3ffj@4ax.com>
>> >
>> >Hoping one of you audiophiles can help me with this one:
>> >
>> >I have a good quality Yamaha surround home system. When I had it
>> >plugged in through my older Hitachi 27" tv set, I could turn on the tv
>> >no problem.
>> >
>> >Now that I have it hooked through my roommate's 32" Zenith tv, when I
>> >turn on the tv or turn it off (his Zenith) there is a loud POP! that
>> >comes out of all the speakers, and I know that's not good for the
>> >speakers. What might be causing that? Is there something I can do to
>> >fix that?
>> >
>> >I also notice the speakes crackle when the furnace turns on our off as
>> >well. Argh!
>> >
>>
>> Well, we are mostly recording studio guys but this sounds like a ground issue.
>> Try plugging into a different AC outlet? Tried a power conditioner (not sure if
>> that will help or not)? You can hirer a contractor (electrical) to come in and
>> run a dedicated outlet for you.
>
>I agree it's a power issue. You may be running close to capacity for
>amperage on the circuit that you are using for the stereo. When you
>turn on the TV, the initial "short" presented by the power supply
>transformer in the TV momentarity presents a power spike (back EMF)
>just after.., and therefore a spike goes onto the power line and then
>through your stereo.
>
>A power conditioner for the stereo should help, but don't get a cheap
>one. Also, I'd suggest running the TV off a different circuit. It may
>be worth having a dedicated circuit installed just for the stereo.
>
>Karl Winkler
>Lectrosonics, Inc.
>http://www.lectrosonics.com

 

[george]

Archived from groups: rec.audio.pro (More info?)

> >> >
> >> >Now that I have it hooked through my roommate's 32" Zenith tv, when I
> >> >turn on the tv or turn it off (his Zenith) there is a loud POP! that
> >> >comes out of all the speakers, and I know that's not good for the
> >> >speakers. What might be causing that? Is there something I can do to
> >> >fix that?
> >>

turn the amp off(or down ) first
the first thing i teach newbies to live sound is
AMPS , ON LAST
OFF FIRST
George

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

skydigger123@hotmail.com wrote:

> Hoping one of you audiophiles can help me with this one:

Well - we're pros actually. As in professional - we make our living by it.

Audiophiles are often referred to as 'audiophools' by the pro community
for their belief in *magic* components and stuff like that.

> I have a good quality Yamaha surround home system. When I had it
> plugged in through my older Hitachi 27" tv set, I could turn on the tv
> no problem.
>
> Now that I have it hooked through my roommate's 32" Zenith tv, when I
> turn on the tv or turn it off (his Zenith) there is a loud POP! that
> comes out of all the speakers, and I know that's not good for the
> speakers. What might be causing that? Is there something I can do to
> fix that?

Hard to say for sure. Almost *all* equipment makes a POP at power-on.

Maybe you were just *lucky* before ?

> I also notice the speakes crackle when the furnace turns on our off as
> well. Argh!

That sounds like a *noisy thermostat* - arcing when it does its thing -
it's not unknown for refridgerators to cause crackles/pops in audio gear
in the same way. A competent electrician may be able to 'suppress' it.

It's 'mains interference' btw. A *good* filter ( not a *gold plated one* )
betwen your wall socket and your hi-fi will help prevent this.

Don't believe marketing bullshit btw ( common in hi-fi ) - ask someone
who actually *knows* and has been there, when asking for recommendations !



Graham

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

No, the coax goes from the wall to a splitter, with 1 lead into tv,
and 1 lead into receiver. the tv the has monster rca's out to
receiver-in.

On 20 Sep 2004 11:42:28 -0400, kludge@panix.com (Scott Dorsey) wrote:

>Karl Winkler <karlwinkler66@yahoo.com> wrote:
>>I agree it's a power issue. You may be running close to capacity for
>>amperage on the circuit that you are using for the stereo. When you
>>turn on the TV, the initial "short" presented by the power supply
>>transformer in the TV momentarity presents a power spike (back EMF)
>>just after.., and therefore a spike goes onto the power line and then
>>through your stereo.
>
>Umm... how is the stereo hooked up to the TV set anyway?
>
>Is it plugged into something with a lot of DC offset?
>--scott

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

hmm i made the groud (using a coaxial cable that i snipped the ends
off of and stripped down) and made no improvement, actually it
DE-proved it hahahah it created a loud hummmmmm. So, I put my tv back
downstairs to test, and when I turn the tv on and off there is a very
faint pop now, barely noticeable.

I think Hitachi is just better quality, filtered outputs, etc. My 27"
Hitachi was $800 when I got it 8yrs ago, and the 32" Zenith my
roommate has was probably $299!

 

[Guest]

Archived from groups: rec.audio.pro (More info?)

<skydigger123@hotmail.com> wrote:
>No, the coax goes from the wall to a splitter, with 1 lead into tv,
>and 1 lead into receiver. the tv the has monster rca's out to
>receiver-in.

Right. Is there DC offset on the RCA outputs of the TV set?
--scott


--
"C'est un Nagra. C'est suisse, et tres, tres precis."