My receiver once in a while will buzz loudly or humm softly. This happens
maybe once every 30 days or so, and I use the thing every day. It *might*
be increasing, but I'm not sure.

Is this indicative of 1. it dying, or 2. something failing and causing an
impropper ground, or short?

Please advise. This is an 8 year old Kenwood receiver. Nothing special.
Pro Logic is all it's got.

--
http://www.allexperts.com is a nifty way to get an answer to just about
/anything/.

Thomas G. Marshall coughed up:
My receiver once in a while will buzz loudly or humm softly. This
happens maybe once every 30 days or so, and I use the thing every
day. It *might* be increasing, but I'm not sure.

Furthermore, I can get it to go away by turning the receiver off then on
again.


....[rip]...


--
http://www.allexperts.com is a nifty way to get an answer to just about
/anything/.

"Thomas G. Marshall"
. com said:

Thomas G. Marshall coughed up:
My receiver once in a while will buzz loudly or humm softly. This
happens maybe once every 30 days or so, and I use the thing every
day. It *might* be increasing, but I'm not sure.

Furthermore, I can get it to go away by turning the receiver off then on
again.


...[rip]...

How are you with a soldering iron?
You could try to resolder the PCB.
If that fails, there are probably some electrolytics on the way out.
If you know what to do and where to get them, it's an easy and
cost-effective repair.
If not, toss it.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

Sander deWaal coughed up:
"Thomas G. Marshall"
. com said:

Thomas G. Marshall coughed up:
My receiver once in a while will buzz loudly or humm softly. This
happens maybe once every 30 days or so, and I use the thing every
day. It *might* be increasing, but I'm not sure.

Furthermore, I can get it to go away by turning the receiver off
then on again.


...[rip]...

How are you with a soldering iron?
You could try to resolder the PCB.
If that fails, there are probably some electrolytics on the way out.
If you know what to do and where to get them, it's an easy and
cost-effective repair.
If not, toss it.


I assume that this means that it is likely that there is a part of the
printed circuit board that has burned or broken away?

I am fairly "ok" with a s-iron. As long as the things nearby the solder
point can withstand the heat. I know about not making "cold solder points",
which are flakey.

Are lower end kenwood receivers repairable at the component level?



--
Onedoctortoanother:"Ifthisismyrectalthermometer,wh erethehell'smypen???"

Sander deWaal coughed up:
"Thomas G. Marshall"
. com said:

Thomas G. Marshall coughed up:
My receiver once in a while will buzz loudly or humm softly. This
happens maybe once every 30 days or so, and I use the thing every
day. It *might* be increasing, but I'm not sure.

Furthermore, I can get it to go away by turning the receiver off
then on again.


...[rip]...

How are you with a soldering iron?
You could try to resolder the PCB.
If that fails, there are probably some electrolytics on the way out.
If you know what to do and where to get them, it's an easy and
cost-effective repair.
If not, toss it.

Here's a new wrinkle.

Out of the blue, the volume dropped to 1/3. Power cycle restores it.

Same prognosis?

--
"It's easier to be terrified by an enemy you admire."
-Thufir Hawat, Mentat and Master of Assassins to House Atreides

"Thomas G. Marshall"

I assume that this means that it is likely that there is a part of the
printed circuit board that has burned or broken away?

Could be, but mostly it's just bad solder joints.
Ageing PCBs that went through a soldering wave bath usually give
problems after several years.
Especially around components that become hot during operation and/or
are under mechanical stress like switches and connectors.

I am fairly "ok" with a s-iron. As long as the things nearby the solder
point can withstand the heat. I know about not making "cold solder points",
which are flakey.

Are lower end kenwood receivers repairable at the component level?

Sure, everything is repairable.
It's just how much money you'd like to spend ;-)

Here's a new wrinkle.

Out of the blue, the volume dropped to 1/3. Power cycle restores it.

Same prognosis?

Weird. Could be anything, from a failing speaker relay via rotten
switches to a defect input selector IC, or just a bad solder joint
somewhere.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

"Sander deWaal" wrote in message

"Thomas G. Marshall"

I assume that this means that it is likely that there is a part of
the printed circuit board that has burned or broken away?

Could be, but mostly it's just bad solder joints.

If there are bad solder joints in an 8 year old piece of equipment, the
soldered joints are unlikely to be the source of the problem. Problems with
poorly soldered joints generally show up very early in the life of the
equipment. When intermittant problems show up this late in life, the
probable causes are switches, volume controls, and other components.

Ageing PCBs that went through a soldering wave bath usually give
problems after several years.

Prior to surface mounting virtually *every* production-soldered circuit card
was wave soldered. Wave soldeing done right generally yields highly reliable
equipment. I'm talking mil-spec, commercial grade, and r installed
communcations equipment that runs flawlessly for decades.

A board that is wave soldered is not bathed in solder. Instead, the molten
solder was pumped in such a way that a flowing bulge of solder was formed
above a larger molten pool of solder. The circuit card rode on a track that
skimmed its underside over the bulge or wave of solder.

Especially around components that become hot during operation and/or
are under mechanical stress like switches and connectors.

This can happen no matter how the board was soldered if the board and
component fastening is poorly designed.

However, there's a basic rule of soldering, and that is that the purpose of
soldering is to limited to making electrical connections. Mechanical
positioning and fastening should always be accomplished by other means.

I am fairly "ok" with a s-iron. As long as the things nearby the
solder point can withstand the heat. I know about not making "cold
solder points", which are flakey.

Are lower end kenwood receivers repairable at the component level?

Sure, everything is repairable.
It's just how much money you'd like to spend ;-)

Here's a new wrinkle.

Out of the blue, the volume dropped to 1/3. Power cycle restores it.

Same prognosis?

Weird. Could be anything, from a failing speaker relay via rotten
switches to a defect input selector IC, or just a bad solder joint
somewhere.

More likely a component flaw than a problem with a regular soldered
connection.

"Arny Krueger" said:

Prior to surface mounting virtually *every* production-soldered circuit card
was wave soldered. Wave soldeing done right generally yields highly reliable
equipment. I'm talking mil-spec, commercial grade, and r installed
communcations equipment that runs flawlessly for decades.

And the OP was talking cheap Kenwood receiver.
Your point being, oh obtuse one?

--
Sander de Waal
" SOA of a KT88? Sufficient. "

"Sander deWaal" wrote in message

"Arny Krueger" said:

Prior to surface mounting virtually *every* production-soldered
circuit card was wave soldered. Wave soldeing done right generally
yields highly reliable equipment. I'm talking mil-spec, commercial
grade, and r installed communcations equipment that runs flawlessly
for decades.

And the OP was talking cheap Kenwood receiver.
Your point being, oh obtuse one?

Most large producers solder all their boards in the same tank - so a cheap
Kenwood receiver has boards soldered in the same tank as the expensive ones.

Your point being?

Sander deWaal coughed up:
"Arny Krueger" said:

Prior to surface mounting virtually *every* production-soldered
circuit card was wave soldered. Wave soldeing done right generally
yields highly reliable equipment. I'm talking mil-spec, commercial
grade, and r installed communcations equipment that runs flawlessly
for decades.

And the OP was talking cheap Kenwood receiver.
Your point being, oh obtuse one?

I think he means /even/ high grade equipment not /just/ high grade
equipment.

--
http://www.allexperts.com is a nifty way to get an answer to just about
/anything/.

"Thomas G. Marshall" said:

Prior to surface mounting virtually *every* production-soldered
circuit card was wave soldered. Wave soldeing done right generally
yields highly reliable equipment. I'm talking mil-spec, commercial
grade, and r installed communcations equipment that runs flawlessly
for decades.

And the OP was talking cheap Kenwood receiver.
Your point being, oh obtuse one?

I think he means /even/ high grade equipment not /just/ high grade
equipment.

Arny means nothing.
BTW excuse me for almost forgetting what this thread was about.
'Borgs always manage to bring up the worst in me.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

"Sander deWaal" wrote in message


"Arny Krueger" said:


"Sander deWaal" wrote in message
m

Ageing PCBs that went through a soldering wave bath usually give
problems after several years.

Prior to surface mounting virtually *every* production-soldered
circuit card was wave soldered. Wave soldeing done right generally
yields highly reliable equipment. I'm talking mil-spec, commercial
grade, and r installed communcations equipment that runs flawlessly
for decades.

And the OP was talking cheap Kenwood receiver.
Your point being, oh obtuse one?

Most large producers solder all their boards in the same tank - so a
cheap Kenwood receiver has boards soldered in the same tank as the
expensive ones.

So you're equating mil-spec, commercial grade and r installed
communications equipment to your average Kenwood receiver?

No Sander, I'm just saying that they were very likely all wave-soldered,
proving that wave-soldering is not necessarily the horror you made it out to
be.

"Sander deWaal" wrote in message



Arny means nothing.

If you really believe that Sander,why do you respond to my posts so quickly
and so frequently?

'Borgs always manage to bring up the worst in me.

There's a lot of worst to bring out it seems, Sander.

"Arny Krueger" said:

No Sander, I'm just saying that they were very likely all wave-soldered,
proving that wave-soldering is not necessarily the horror you made it out to
be.

Never mind, what do I know?
I only repaired these things for about 20 years or so.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

"Arny Krueger" said:

Arny means nothing.

If you really believe that Sander,why do you respond to my posts so quickly
and so frequently?

To ensure that people asking serious questions aren't lured into the
quagmire of your misinformation and deceptions.*)

'Borgs always manage to bring up the worst in me.

There's a lot of worst to bring out it seems, Sander.

Any more good advice for the OP, Arnold?



*) Am I improving on my language skills or what?

--
Sander de Waal
" SOA of a KT88? Sufficient. "

Sander deWaal coughed up:
"Arny Krueger" said:

Arny means nothing.

If you really believe that Sander,why do you respond to my posts so
quickly and so frequently?

To ensure that people asking serious questions aren't lured into the
quagmire of your misinformation and deceptions.*)

'Borgs always manage to bring up the worst in me.

There's a lot of worst to bring out it seems, Sander.

Any more good advice for the OP, Arnold?



*) Am I improving on my language skills or what?


Maybe I should ask this a different way that doesn't put you both at each
other's throats (regardless who's right).

If I go and open the thing up.... Besides seeing a lot of dust (could that
cause this?), what should I look for besides loose components and burn
marks?



--
Everythinginlifeisrealative.Apingpongballseemssmal luntilsomeoneramsitupyourn
ose.

"Thomas G. Marshall" said:

Maybe I should ask this a different way that doesn't put you both at each
other's throats (regardless who's right).

No prob, we're just doing our daily dance.
Afterwards we kiss it off and have a beer together :-)

If I go and open the thing up.... Besides seeing a lot of dust (could that
cause this?), what should I look for besides loose components and burn
marks?

When you see obvious things like loose or burned components or
tracks, the fix seems easy. That's unlikely though, since you implied
the receiver works well most of the time.
However, I think you'd benefit from resoldering at least the
power/driver transistors/ICs and large resistors in the amp stage.
Check the entire PCB for suspicious solder joints (kind of hard to
explain, but once you know what to look for, it's really easy).
If there are any mechanical switches in the signal path, such as input
selectors, speaker selectors or speaker relays, spray them with
contact cleaner and push/turn them a few times around.

If that doesn't help, it will need a more thorough checkup, and it's
up to you if the receiver is worth it.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

"Sander deWaal" wrote in message

"Arny Krueger" said:

No Sander, I'm just saying that they were very likely all
wave-soldered, proving that wave-soldering is not necessarily the
horror you made it out to be.

Never mind, what do I know?

More and more about less and less?

I only repaired these things for about 20 years or so.

Irrelevant, since repairing equipment is not the same as visting the factory
and watching how it is built. To make the claim you made, you'd have to know
how both good and bad equipment was made. Fact is, any high-production
non-SMT equipment was probably wave soldered, whether it was good or bad.

"Thomas G. Marshall"
. com wrote in message
newsJumd.7308$063.3825@trndny03


Maybe I should ask this a different way that doesn't put you both at
each other's throats (regardless who's right).


Sander apparently thinks he has got to try to get even with me again, no
matter the cost to his credibility.

Arny said:

There's a lot of worst to bring out it seems, Sander.


I'm sure that's what your high school English teacher thought about you.

Boon

"Arny Krueger" wrote in message
...


Sander apparently thinks he has got to try to get even with me again, no
matter the cost to his credibility.


no one wants to sink that low.

"Thomas G. Marshall" wrote:

My receiver once in a while will buzz loudly or humm softly. This happens
maybe once every 30 days or so, and I use the thing every day. It *might*
be increasing, but I'm not sure.

Quite likely it is. Once these things start.......


Is this indicative of 1. it dying, or 2. something failing and causing an
impropper ground, or short?

Probably neither. It may simply be a poor connection.


Please advise. This is an 8 year old Kenwood receiver. Nothing special.
Pro Logic is all it's got.

Have you tried thumping it when it misbehaves ?

A good way of discovering if a poor joint is at fault.


Graham

Pooh Bear coughed up:
"Thomas G. Marshall" wrote:

My receiver once in a while will buzz loudly or humm softly. This
happens maybe once every 30 days or so, and I use the thing every
day. It *might* be increasing, but I'm not sure.

Quite likely it is. Once these things start.......


Is this indicative of 1. it dying, or 2. something failing and
causing an impropper ground, or short?

Probably neither. It may simply be a poor connection.


Please advise. This is an 8 year old Kenwood receiver. Nothing
special. Pro Logic is all it's got.

Have you tried thumping it when it misbehaves ?

A good way of discovering if a poor joint is at fault.


Graham

Excellent point! I once had one of the very first Atari-800's. It was a
beaut of a machine back then, but it had a flakiness to it that caused me to
have to smack it hard (!!) every now and then to turn on properly.

--
Forgetthesong,I'dratherhavethefrontallobotomy...

"Arny Krueger" said:

Never mind, what do I know?

More and more about less and less?

"At least" I know this :-)

I only repaired these things for about 20 years or so.

Irrelevant, since repairing equipment is not the same as visting the factory
and watching how it is built. To make the claim you made, you'd have to know
how both good and bad equipment was made. Fact is, any high-production
non-SMT equipment was probably wave soldered, whether it was good or bad.

I saw the results of wave-soldering in consumer electronics for a long
time.
It sucks, mostly.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

"Arny Krueger" said:

Sander apparently thinks he has got to try to get even with me again, no
matter the cost to his credibility.

Other than some well-known RAO posters, I don't care about any
credibility in this forum. I have plenty of credibility in the real
world, and that's what counts for me.
I just try to give the OP some hints at where to look at in his
receiver. What he's doing with that information is up to him.
Whether or not he believes me is up to him, and irrelevant to me.

Me getting even with you? In snottiness perhaps? Not possible.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

Sander deWaal wrote:


"Arny Krueger" said:

Sander apparently thinks he has got to try to get even with me again, no
matter the cost to his credibility.

Other than some well-known RAO posters, I don't care about any
credibility in this forum. I have plenty of credibility in the real
world, and that's what counts for me.
I just try to give the OP some hints at where to look at in his
receiver. What he's doing with that information is up to him.
Whether or not he believes me is up to him, and irrelevant to me.

Me getting even with you? In snottiness perhaps? Not possible.

--
Sander de Waal
" SOA of a KT88? Sufficient. "



Krueger can definitely claim supremacy in that area, as well as in the area of
libelous false claims about others and gross misrepresenation of various types
of audio equipment.


Bruce J. Richman

"Sander deWaal" wrote in message

"Arny Krueger" said:

Never mind, what do I know?

More and more about less and less?

"At least" I know this :-)

I only repaired these things for about 20 years or so.

Irrelevant, since repairing equipment is not the same as visting the
factory and watching how it is built. To make the claim you made,
you'd have to know how both good and bad equipment was made. Fact
is, any high-production non-SMT equipment was probably wave
soldered, whether it was good or bad.

I saw the results of wave-soldering in consumer electronics for a long
time.

No, what you saw was the results of consumer electronics priority choices.

Wave soldering was pretty much the one way circuit cards were soldered in
volume, prior to the advent of SMT. It was used for commerical, military,
computer, communications, just about any form of electronics. Some people
did it right, others didn't. Done right, it worked well.

It sucks, mostly.

Done right, wave soldering worked splendidly.

Arny Krueger wrote:
"Sander deWaal" wrote in message

I only repaired these things for about 20 years or so.


Irrelevant,


WHOA! This one was amazing, even for kroogy!

"Fella" wrote in message

Arny Krueger wrote:
"Sander deWaal" wrote in message

I only repaired these things for about 20 years or so.


Irrelevant,


WHOA! This one was amazing, even for kroogy!
]
Deceptive editing noted. Yet another RAO troll-liar bites the dust.

Arny Krueger wrote:

"Fella" wrote in message


Arny Krueger wrote:

"Sander deWaal" wrote in message


I only repaired these things for about 20 years or so.


Irrelevant,


WHOA! This one was amazing, even for kroogy!

]
Deceptive editing noted. Yet another RAO troll-liar bites the dust.


AH! Ok, so you went to some factory and had a 15 minute tour of some
production facilities. And you think this gives you MORE INSIGHT into a
given device / production method, than another guy that HAS REPAIRED
THEM FOR _*20*_ YEARS!!!!!!! DUH!!!!!!!!

Come to think of it, the "deceptive editing" as you put it, was to your
advantage.

"Fella" wrote in message

Arny Krueger wrote:

"Fella" wrote in message


Arny Krueger wrote:

"Sander deWaal" wrote in message


I only repaired these things for about 20 years or so.


Irrelevant,

WHOA! This one was amazing, even for kroogy!
]
Deceptive editing noted. Yet another RAO troll-liar bites the dust.

AH! Ok, so you went to some factory and had a 15 minute tour of some
production facilities.

I've been in several electronic assembly facilities, and spent a lot more
than just 15 minutes in each one. I had a business associate who owned
electronic assembly facility and worked with him on joint projects there. I
also worked in a different one for a while doing other technical work.

deWaal wants to condemn wave soldering, but he's poorly advised to do so.
deWaal exposes his ignorance and prejudices often, and this is just another
example.

Wave soldeing is a well-proven process that works well when properly applied
and controlled.

Wave soldering was THE standard way to solder electronic circuit cards until
SMT became popular.

Wave soldeing was used for electronic assembly at a wide variety of price
and quality points. It's still being used where it fits.

Thanks for exposing your own ignorance and stupidity, Fella.

Arny Krueger wrote:

"Fella" wrote in message


Arny Krueger wrote:


"Fella" wrote in message



Arny Krueger wrote:


"Sander deWaal" wrote in message



I only repaired these things for about 20 years or so.


Irrelevant,


WHOA! This one was amazing, even for kroogy!

]

Deceptive editing noted. Yet another RAO troll-liar bites the dust.


AH! Ok, so you went to some factory and had a 15 minute tour of some
production facilities.


I've been in several electronic assembly facilities, and spent a lot more
than just 15 minutes in each one.

Ok, 25 minutes, you happy now?


I had a business associate who owned
electronic assembly facility and worked with him on joint projects there.

Yes, and I am inclined to be-LEIVE YOU!! DUH!!


Thanks for exposing your own ignorance and stupidity, Fella.


It ain't so just because you say so. It's s free country, you can write
whatever the **** you want, "Thanks for exposing your own ignorance and
stupidity, Fella. Thaaanks, you just showed all of us how illeterate and
dumb you are fella, so theeeere" ... Just useless, baseless opinions by
some cheap, corrupted little borg shameless enough to impersonate an
impersonator impersonating him, hated by all, despised, wooden eared,
pink noise generator useless piece of junk of a waste of flesh.

"George M. Middius" wrote in message

Fella said:

I only repaired these things for about 20 years or so.

Irrelevant,

WHOA! This one was amazing, even for kroogy!

Deceptive editing noted. Yet another RAO troll-liar bites the dust.

AH! Ok, so you went to some factory and had a 15 minute tour of some
production facilities. And you think this gives you MORE INSIGHT
into a given device / production method, than another guy that HAS
REPAIRED THEM FOR _*20*_ YEARS!!!!!!! DUH!!!!!!!!

Are you forgetting Krooger's status as a former warranty technician?
He once bore the weighty responsibility of deciding which defective
cars Chrysler would repair and which the company would hang on their
victims. Er, customers.

Another clear sign that the perpetrator of the Middius sockpuppet is losing
it mentally. I did work for Chrysler, but solely as a product development
engineer. I did earlier work with warranty claims, but at a computer
operator in the data processing department of Fisher Body. This was all over
30 years ago. I've explained this all to him, and corrected him many times.
But, he keeps getting his facts confused.

"Arny Krueger" said:

deWaal wants to condemn wave soldering, but he's poorly advised to do so.
deWaal exposes his ignorance and prejudices often, and this is just another
example.

Krueger wants us to believe that production lines at Hewlett Packard
are of the same quality as those of Japanese mass-production companies
like Kenwood.

Wave soldeing is a well-proven process that works well when properly applied
and controlled.

Irrelevant. We were discussing the quality of PCB soldering of
consumer electronics, something I have extended experience with.
I estimate that 50% of the problems are solved by resoldering PCBs.

Wave soldering was THE standard way to solder electronic circuit cards until
SMT became popular.

No argument from me here.

Wave soldeing was used for electronic assembly at a wide variety of price
and quality points. It's still being used where it fits.

Heyhey! A wide variety of price and quality.
Thanks for admitting that wave soldering isn't always of such high
quality.

Thanks for exposing your own ignorance and stupidity, Fella.

Thanks for exposing your......how shall I say it.....borgishness,
Arnold.

Knowing you, you'd probably think of that as a compliment.
Go figure!

--
Sander de Waal
" SOA of a KT88? Sufficient. "

"Sander deWaal" wrote in message

"Arny Krueger" said:

deWaal wants to condemn wave soldering, but he's poorly advised to
do so. deWaal exposes his ignorance and prejudices often, and this
is just another example.

Krueger wants us to believe that production lines at Hewlett Packard
are of the same quality as those of Japanese mass-production companies
like Kenwood.

Not at all. However, in the days before SMT both production lines no doubt
used wave soldering. This contrasts with de Waal's blanket indictment of
wave soldering,

Wave soldeing is a well-proven process that works well when properly
applied and controlled.

Irrelevant.

Dismissive of a relevant point.

We were discussing the quality of PCB soldering of
consumer electronics, something I have extended experience with.

That may be, but in the processed you condemned all wave-soldering:

"Ageing PCBs that went through a soldering wave bath usually give problems
after several years."

Fact of the matter is that ageing PCBs that went though a soldering wave
bath are usually trouble free. Most soldering problems become apparent
shortly after the equipment is built.

I estimate that 50% of the problems are solved by resoldering PCBs.

I estimate that only a tiny percentage of all wave-soldered circuit boards
have problems due to soldering.

Wave soldering was THE standard way to solder electronic circuit
cards until SMT became popular.

No argument from me here.

OK, then why the blanket condemnation of wave soldering?

Wave soldeing was used for electronic assembly at a wide variety of
price and quality points. It's still being used where it fits.

Heyhey! A wide variety of price and quality.


Thanks for admitting that wave soldering isn't always of such high
quality.

Thats not an indictment of the wave soldering process, its an indictment of
build quality for whenever its substandard.

Thanks for exposing your own ignorance and stupidity, Fella.

Thanks for exposing your......how shall I say it.....borgishness,
Arnold.

Borgishness is something you might aspire to, Sander. However, you seem to
lack the high intelligence and open-mindedness typical of members of the
Borg empire.

Knowing you, you'd probably think of that as a compliment.

We rule technology. Nuff said!

Go figure!

Nothing like winning!

"George M. Middius" wrote in message
news
Arnii, this is quite a breakthrough for you. I'm nonplused.

Are you forgetting Krooger's status as a former warranty technician?
He once bore the weighty responsibility of deciding which defective
cars Chrysler would repair and which the company would hang on their
victims. Er, customers.

Another clear sign that the perpetrator of the Middius sockpuppet is
losing
it mentally. I did work for Chrysler, but solely as a product development
engineer. I did earlier work with warranty claims, but as a computer
operator in the data processing department of Fisher Body. This was all
over
30 years ago. I've explained this all to him, and corrected him many
times.
But, he keeps getting his facts confused.

I can only imagine what it feels like to unburden yourself like that.

Unburden what?

Congratulations, and I hope you'll make a habit of this newfound
attraction to honesty.

As if you're some kind of paragon of honesty, Middius?

It will be such a huge change for you. Good
luck on your new lifestyle.

It's just the same-old some-old.

BTW, congratulations for not tampering with the truth, Middius.

Pooh Bear coughed up:
"Thomas G. Marshall" wrote:

My receiver once in a while will buzz loudly or humm softly. This
happens maybe once every 30 days or so, and I use the thing every
day. It *might* be increasing, but I'm not sure.

Quite likely it is. Once these things start.......


Is this indicative of 1. it dying, or 2. something failing and
causing an impropper ground, or short?

Probably neither. It may simply be a poor connection.


Please advise. This is an 8 year old Kenwood receiver. Nothing
special. Pro Logic is all it's got.

Have you tried thumping it when it misbehaves ?

A good way of discovering if a poor joint is at fault.


Graham


As an update. Thing is still happening, but on your advice (and following
the advice upthread about concerns of the volume knob), when it happened
again I /gently/ tapped the volume knob and all was well again.

Question: I am assuming that the solution is contact cleaner, but why would
this help, and what is wrong?




--
Framsticks. 3D Artificial Life evolution. You can see the creatures
that evolve and how they interact, hunt, swim, etc. (Unaffiliated with
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"Thomas G. Marshall"

As an update. Thing is still happening, but on your advice (and following
the advice upthread about concerns of the volume knob), when it happened
again I /gently/ tapped the volume knob and all was well again.

Question: I am assuming that the solution is contact cleaner, but why would
this help, and what is wrong?

The pot is getting old. Sometimes spraying contact cleaner in it
helps, but only if the resistance path of the pot isn't worn out.
If the latter is the case, only thing that helps is replacing it.

--
Sander de Waal
" SOA of a KT88? Sufficient. "

Sander deWaal coughed up:
"Thomas G. Marshall"

As an update. Thing is still happening, but on your advice (and
following the advice upthread about concerns of the volume knob),
when it happened again I /gently/ tapped the volume knob and all was
well again.

Question: I am assuming that the solution is contact cleaner, but
why would this help, and what is wrong?

The pot is getting old. Sometimes spraying contact cleaner in it
helps, but only if the resistance path of the pot isn't worn out.

If that were the case, then why would tapping the potentiometer help it? If
it's worn out, it's worn out. No?


If the latter is the case, only thing that helps is replacing it.



--
Whyowhydidn'tsunmakejavarequireanuppercaseletterto startclassnames....

"Thomas G. Marshall"

The pot is getting old. Sometimes spraying contact cleaner in it
helps, but only if the resistance path of the pot isn't worn out.

If that were the case, then why would tapping the potentiometer help it? If
it's worn out, it's worn out. No?

Wearing of components can happen in different ways.
Maybe the wiper is (about to come) loose from its connection.

I suggest you try contact cleaner first.
If that doesn't help, replacement is the only alternative I see,
besides the pot being loose from its soldering joints in the PCB.
But that's not the case, according to Arny. Wave soldering is holy,
untoucheable and lasting for millennia to come.

--
Sander de Waal
" SOA of a KT88? Sufficient. "