Digest for sci.electronics.repair@googlegroups.com - 6 updates in 4 topics

Jeff Liebermann <jeffl@cruzio.com>: Sep 20 09:16AM -0700

On Tue, 19 Sep 2017 21:19:29 -0400, micky <NONONOmisc07@bigfoot.com>
wrote:
 
>I've been reading about a car like mine and the owner says that the rear
>subwoofer is "blown". I always took that to refer to an electrical
>open. Does that ever happen?
 
Please check that it didn't say "blown away" which is something quite
different.
 
>But does it also refer to a torn surround?
 
Torn surround, surroundings, or both?
<http://main.iosmars.com/wp-content/uploads/2014/10/image1.jpg>
 
 
--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
"pfjw@aol.com" <pfjw@aol.com>: Sep 20 07:00AM -0700

On Wednesday, September 20, 2017 at 3:40:27 AM UTC-4, N_Cook wrote:
 
> If I have to assess the owner as to technical/elfin-safety competance,
> I'll have a pre-prepared UK mains plug and bit of lead with very
> specific posed faults, and get him to point them out.
 
Usually, each Christmas Season, I give a couple of restored radios to my wire's church for the silent auction. Each AA5 that crosses my bench will get:
 
a) A polarized line-cord so that the switched conductor is Hot. This does not mitigate against a mis-wired receptacle, but it does help some.
b) 105C electrolytic caps and 600 V film caps.
c) Wiring with crumbling insulation is replaced.
d) Controls are thoroughly cleaned and checked.
e) Lamps, if any, are replaced.
f) Dials are restrung if marginal in any way
 
And - this note is enclosed:
 
This is a transformerless radio. This means that the metal parts of the radio and chassis may be at line potential (carrying dangerous amounts of current) at any time whether the radio is in operation or not. Accordingly:
• Unplug this radio when not in use.
• Handle the radio only by the knobs and case when in use. Do not
touch the chassis or screws under the case.
• Unplug the radio before servicing or changing tubes.
• Do not use this radio in a damp location or around water.
• Do not ground the chassis of this radio.
• If attaching an external antenna, do so only to the proper
connection and use insulated wire.
 
Peter Wieck
Melrose Park, PA
Bob Engelhardt <BobEngelhardt@comcast.net>: Sep 20 11:51AM -0400

From: https://repaircafe.org/
 
"Repair Cafés are free meeting places and they're all about repairing
things (together). In the place where a Repair Café is located, you'll
find tools and materials to help you make any repairs you need. On
clothes, furniture, electrical appliances, bicycles, crockery,
appliances, toys, et cetera. You'll also find expert volunteers, with
repair skills in all kinds of fields."
Geo <nhhu-o3hu@dea.spamcon.org>: Sep 20 03:49PM +0100


>Would you like me to confirm what the missing values are (the vertical
>component and the cap)?
 
Not for my sake anyway - I was bored.
 
>The PCB was just stuffed into a little zip top component bag and it
>all bundled in there and the base put back on. I probably intended
>doing it properly sometime but ... ;-)
 
I open boxes now and don't even know what the board inside was meant
to do - and I will have built it many years ago.
Bruce Esquibel <bje@ripco.com>: Sep 20 10:24AM

> addition to that?
 
> FWIW, here's the whole ad
> http://www.ebay.com/itm/Sony-Lens-Double-2Din-7-Car-Stereo-Radio-DVD-Player-iPod-Bluetooth-TV-MP3-Mic-HD-/142486326437?_trksid=p2141725.m3641.l6368
 
 
I wouldn't trust anything in that listing.
 
It seems to be promoted (misleading) as some kind of Sony, but appears to
be a HIZPO.
 
A similar ad on Amazon says "analog tv" which I'm assuming from lack of other
information, it's the old NTSC so low power stations would be it. I think we
only have one left here in Chicago, and it's just a traffic map with some
radio station for audio.
 
It appears along the top is a slot-fed dvd/cd player, so I'm assuming if you
slide a disc in, it'll play it.
 
I'd look it up on Amazon (hizpo), pick one close and read the reviews on the
product. Average price seems to be around $100 and appears only to be worth
that.
 
-bruce
bje@ripco.com
micky <NONONOmisc07@bigfoot.com>: Sep 20 04:19AM -0400

BTW, I'm not going to watch videos while I drive and most likely never.
I just wanted to understand what was meant.
 
 
 
In sci.electronics.repair, on Wed, 20 Sep 2017 01:38:28 -0400, micky
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