Digest for sci.electronics.repair@googlegroups.com - 8 updates in 6 topics

etpm@whidbey.com: Aug 07 09:31AM -0700

>talk to some tech guy there. Often when something blows it will take out
>several parts... you probably know that.
 
>George H.
This is my son's lamp and he has been busy getting his girlfriend's
mothers's house ready to sell. He finally finished on Saturday last
and can now look again at the lamp. He did contact the maker and they
will only sell him new LED drivers. No advice on troubleshooting the
existing drivers. Maybe this is because they have updated the drivers.
So my son can buy the new style but will try first to fix what he has.
Eric
Phil Allison <pallison49@gmail.com>: Aug 06 09:52PM -0700

tabb...@gmail.com wrote:
 
-------------------------
 
 
 
 
> > The caps used in hot chassis radios and TVs were all special high voltage ceramics rated for the task.
 
> I've got sets like that from pre-war onward, none of those caps are
> .ceramic, all paper.
 
** Antenna safety isolation only needs caps of about 100pF = impedance of 30 ohms at 50Mhz.
 
The examples I saw were sets made from the late 1960s onwards, when working of a TV hire and repair business.
 
Never seen a 100pF paper cap.
 
 
 
.... Phil
tabbypurr@gmail.com: Aug 07 06:27AM -0700

On Monday, 7 August 2017 05:52:49 UTC+1, Phil Allison wrote:
 
> The examples I saw were sets made from the late 1960s onwards, when working of a TV hire and repair business.
 
> Never seen a 100pF paper cap.
 
> .... Phil
 
Mine are 20s - 50s. Don't know what values the caps are offhand.
 
 
NT
"Michael A. Terrell" <mike.terrell@earthlink.net>: Aug 07 08:39AM -0400


> This one is an Ebay item, those sometimes are so long that if I copy
> them to notepad, they are 5 lines long. (Damn near a whole paragraph).
 
> There is a way to PREVIEW Tinyurl links.
 
 
Learn how to edit out the crap from an Ebay link. For instance:
<http://www.ebay.com/itm/SIM808-GPS-GSM-GPRS-Quad-Band-Module-Shield-with-3M-Antenna-for-Arduino/182633887502?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D41376%26meid%3D3a1099ab42b54d929397e17d018abafd%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D132160043879>
 
can be shortened to :
<http://www.ebay.com/itm/SIM808-GPS-GSM-GPRS-Quad-Band-Module-Shield-with-3M-Antenna-for-Arduino/182633887502>
by trimming everything after the listing number. It can be trimmed even
more, like this: <http://www.ebay.com/itm/182633887502> by removing the
description part:
SIM808-GPS-GSM-GPRS-Quad-Band-Module-Shield-with-3M-Antenna-for-Arduino/
from the link so all you need is the link to Ebay, followed by /itm/
then the listing number.
 
All three methods will display the same item.
 
--
Never piss off an Engineer!
 
They don't get mad.
 
They don't get even.
 
They go for over unity! ;-)
"pfjw@aol.com" <pfjw@aol.com>: Aug 07 05:03AM -0700

Mpfffff...
 
No, I do not do precision work, which, in point-of-fact is probably the case as the typical Zenith or Hallicrafters or Tesla or SNR radio is not a precision instrument. But, they do just fine aligning with a Fluke meter ILO a VTVM.
 
Nor, of course does Old School. And, given his posts, is likely defeated by anything more complex than a rubber spoon.
 
Peter Wieck
Melrose Park, PA
"Michael A. Terrell" <mike.terrell@earthlink.net>: Aug 06 10:57PM -0400

Jeff Liebermann wrote:
> both. However, don't blame the guide vendor. Stations often change
> their programming at the last moment for odd reasons (sponsor
> pressure, current events, ongoing disaster coverage, etc).
 
 
The original EPG was a service provided by United Video
Cablevision's microwave division. Their computers were in Tulsa OK, and
they were linked to their WGN uplink in Chicago by a pair of leased
phone lines. One pair fed the data North to Chicago, while the second
echoed it back to their PDP -11 computers in Tulsa OK. It was
transmitted on a subcarrier along with WGN to CATV headends across the
country. The demod and processor was a 6502 based rack mounted computer
that put out NTSC color video. I got into a very heated argument with
the head of our Microwave division, as I told him how to uplink the
signal from the computer site, but leave it on the WGN transponder. He
told me it was impossible, so I told him that if he couldn't do it, he
should quit his job. Two months later, they announced the change, and
that HIS idea was saving the company over $15K per month for the leased
lines.
 
 
--
Never piss off an Engineer!
 
They don't get mad.
 
They don't get even.
 
They go for over unity! ;-)
tabbypurr@gmail.com: Aug 06 03:59PM -0700

On Tuesday, 1 August 2017 20:17:00 UTC+1, Gareth Magennis wrote:
 
> Cheers,
 
> Gareth.
 
a stereo tv? Put the speakers in series on the remaining channel.
 
 
NT
"Gareth Magennis" <soundserviceleeds@outlook.com>: Aug 07 12:15AM +0100

wrote in message
news:7322c544-feb1-4470-b5f6-c517a29792f2@googlegroups.com...
 
On Tuesday, 1 August 2017 20:17:00 UTC+1, Gareth Magennis wrote:
 
> Cheers,
 
> Gareth.
 
a stereo tv? Put the speakers in series on the remaining channel.
 
 
 
**********************************************************
 
 
No, this is a 5 channel surround sound power amp with Sub signal output.
 
 
Gareth.
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