Digest for sci.electronics.repair@googlegroups.com - 12 updates in 4 topics

N_Cook <diverse@tcp.co.uk>: Jul 14 02:05PM +0100

> some help fixing this as I really like the features and extra
> inputs these older units have compared to today's.
 
> Why does the same thing keep quitting on this model?
 
Same central speaker with some intermittent short on the VC ?
Chuck <chuck@mydeja.net>: Jul 15 08:20AM -0500

On Tue, 14 Jul 2015 05:20:37 -0700 (PDT), thekmanrocks@gmail.com
wrote:
 
>some help fixing this as I really like the features and extra
>inputs these older units have compared to today's.
 
>Why does the same thing keep quitting on this model?
 
 
See if you can see any small black plastic rectangles on the amp or
speaker terminal board (relays). Tap on them with a plastic or wood
stick. If the center channel comes back, replace the relay or
resolder the connections to it if they look bad.
 
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"Mark Zacharias" <mark_zacharias@labolgcbs.net>: Jul 16 07:38AM -0500

"Chuck" <chuck@mydeja.net> wrote in message
news:k3ncqatvmhho8db2sos0rd2ditd6qf0l7t@4ax.com...
 
> ---
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> https://www.avast.com/antivirus
 
I've worked on analog receivers almost every day for 33 years. While I
cannot diagnose via usenet, if there IS a history of these blowing the
center channel, I would look very closely at solder connections relating to
the bias transistor. This is the type of thing that might cause such a
history on a given model type.
 
The advice given on the relay is good if the channel volume is merely down
or especially if the volume is intermittent and comes back with an increase
of the volume control setting or as he said with tapping the relay body.
 
Mark Z.
"Snuffy \"Hub Cap\" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com>: Jul 14 09:34PM -0700

"Snuffy "Hub Cap" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com> wrote in message news:hI6dneJjLo7dvwHInZ2dnUU7-TmdnZ2d@earthlink.com...
I have a analog TV that is still working fine and no plans to replace it. Over time, it has developed an audio hum - I'm guessing it's 60 Hz. When the picture is dark, the hum is nearly gone. The brighter the picture, the louder it is. I'm guessing some kind of filter on the speaker connections would do it, maybe something as simple as connecting a capacitor circuit.... But, as I ain't the sharpest feller with audio electronics, I thought I better ask the genius pool here!
 
First I thought was a power cord was near the antenna cable, but that doesn't seem to be the problem.
 
The key word in all this is "cheap". Anything over $10 is way out of line.
 
Snuffy
 
===
 
Thanks for all the good info. If I had a place to work, I would take a look, but the most practical for this one is to get a replacement set, new or used.
 
I use a CRT monitor on one of the computers here and LCD displays can't compare with his colors. But the power cost is definitely higher -- plus, more importantly during the summer - it heats up the room...
"Ralph Mowery" <rmowery28146@earthlink.net>: Jul 15 10:34AM -0400

"Snuffy "Hub Cap" McKinney" <Snuffy-Hub-Cap@Livebait-McKinney.com> wrote in
message news:hI6dneJjLo7dvwHInZ2dnUU7-TmdnZ2d@earthlink.com...
 
>First I thought was a power cord was near the antenna cable, but that
>doesn't seem to be the problem.
 
>The key word in all this is "cheap". Anything over $10 is way out of line.
 
Look on Facebook or Craigs list for a free TV. They are always giving those
old things away.
The power cord could be wrapped around the antenna and not cause hum.
Probably a filter capacitor needs replacing. If you had some on hand, open
the TV up and just hold the leads of the new one across the capacitors and
find the one where the hum quits .
Cursitor Doom <curd@notformail.com>: Jul 14 09:04PM

On Tue, 14 Jul 2015 12:44:05 -0700, jurb6006 wrote:
 
 
> Like BMW or someone came out with a head design for a car engine -
> tricellular combustion chanber. Something likt that. Took three words in
> English to describe, German can do it in one. I like that.
 
Actually, the entire German language vocabulary is significantly smaller
than the English one. Germans don't have specific words for things like
you assume they do; they simply run separate words together by removing
the spaces in between, so by way of example in English, you would have
the warning sign: "treebranchfallingoffdanger" in public parks and such
like. This can make for some incredibly long and intimidating looking
words to foreigners who are unfamiliar with the practice.
c4urs11 <c4urs11@domain.hidden>: Jul 14 09:13PM

On Tue, 14 Jul 2015 21:04:08 +0000, Cursitor Doom wrote:
 
> the warning sign: "treebranchfallingoffdanger" in public parks and such
> like. This can make for some incredibly long and intimidating looking
> words to foreigners who are unfamiliar with the practice.
 
Like Rindfleischetikettierungsüberwachungsaufgabenübertragungsgesetz?
 
Cheers!
Cursitor Doom <curd@notformail.com>: Jul 14 09:40PM

On Tue, 14 Jul 2015 21:13:23 +0000, c4urs11 wrote:
 
> Like Rindfleischetikettierungsüberwachungsaufgabenübertragungsgesetz?
 
> Cheers!
 
Genau! ;-)
Clifford Heath <no.spam@please.net>: Jul 15 03:15AM +1000

> get it to run in Firefox right so it is saved in MHT format, which
> means my copy will only open in IE. You might have different results,
> or as they say YMMV.
 
Glad you like it. I enjoyed writing it. I'm surprised it doesn't work
in your Firefox though - it does for me, both from the web and from the
saved files. Are you sure you saved it correctly?
 
Clifford Heath.
John Robertson <spam@flippers.com>: Jul 14 09:24PM -0700

On 07/14/2015 2:40 PM, Cursitor Doom wrote:
 
>> Like Rindfleischetikettierungsüberwachungsaufgabenübertragungsgesetz?
 
>> Cheers!
 
> Genau! ;-)
 
Ah, but it seems that word (Rind...) no longer exists...
 
http://www.telegraph.co.uk/news/worldnews/europe/germany/10095976/Germany-drops-its-longest-word-Rindfleischeti....html
 
John :-#)#
 
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N_Cook <diverse@tcp.co.uk>: Jul 15 08:03AM +0100

On 15/07/2015 05:24, John Robertson wrote:
 
> Ah, but it seems that word (Rind...) no longer exists...
 
> http://www.telegraph.co.uk/news/worldnews/europe/germany/10095976/Germany-drops-its-longest-word-Rindfleischeti....html
 
> John :-#)#
 
And the Welsh place name
Llanfairpwllgwyngyllgogerychwyrndrobwyll-llantysiliogogogoch
was artificially composed purely as a tourist trap.
I heard the english word
antisdisestablishmentarianism
validly used in a documentary a month back
mroberds@att.net: Jul 19 10:15PM

> I hooked up the inverter directly to the car battery in the car.
 
What did the wiring from the inverter to the car battery look like? If
it involved either a cigarette lighter plug or alligator clips,
improving that connection will help a little. Ideally you would have
fairly thick cables (8 AWG or thicker), as short as possible, running
from the inverter to the battery terminals. Remember, if the inverter
is putting out the full 500 W, it will be drawing around 42 amps from
the battery.
 
> If the car wasn't running the entire time, the items connected to the
> inverter would start flickering on and off after a period of time.
 
This was probably the low-voltage shutdown in the inverter trying to
operate. Most of them will shut off the AC output when the DC input
voltage gets too low, so as to avoid running the battery down too far.
Usually this isn't adjustable, but on some inverters it might be...
check the manual if you have one.
 
> There certainly wasn't a lot of wattage being drawn.... the TV uses
> like 100 watts
 
Have you measured it or looked at the nameplate? This is from 2009
http://www.enerank.com/tv-power-consumption-energy-efficiency-46-inches.php
but 46" TVs drew from 107-310 W.
 
> with the lights maybe 10 watts each, and there were 2.
 
A 60 W equivalent CFL is usually 13 or 14 W. If you're playing games
like this, a Kill-a-Watt or similar portable watt-hour meter is a good
tool. http://www.p3international.com/products/p4400.html
 
Standard disclaimers apply: I don't get money or other consideration
from any companies mentioned.
 
Matt Roberds
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