Digest for sci.electronics.repair@googlegroups.com - 11 updates in 6 topics

bruce2bowser@gmail.com: Jan 25 07:12AM -0800

Here's Why You Shouldn't Leave a Giant Parabolic Mirror in Your Car on a Sunny Day
Gizmodo - July 25, 2018
-- https://gizmodo.com/heres-why-you-shouldnt-leave-a-giant-parabolic-mirror-i-1827858823
 
=======================================
San Francisco School Teacher MELTS The Rear Of His Subaru After Leaving Homemade Solar Oven In The Trunk.
Daily Mail - July 25, 2018
-- https://www.dailymail.co.uk/sciencetech/article-5992795/San-Francisco-school-teacher-MELTS-rear-Subaru-leaving-parabolic-mirror-trunk.html
amdx <nojunk@knology.net>: Jan 25 09:27AM -0600

> San Francisco School Teacher MELTS The Rear Of His Subaru After Leaving Homemade Solar Oven In The Trunk.
> Daily Mail - July 25, 2018
> -- https://www.dailymail.co.uk/sciencetech/article-5992795/San-Francisco-school-teacher-MELTS-rear-Subaru-leaving-parabolic-mirror-trunk.html
 
When my son was in HS they had a solar day. I had a Large Fresnel
lens in a frame and took it to the school, and set it up with all the
other cookers. I was melting pennies making the teacher very nervous!
Mikek
bruce2bowser@gmail.com: Jan 25 07:31AM -0800

On Saturday, January 25, 2020 at 10:27:41 AM UTC-5, amdx wrote:
> lens in a frame and took it to the school, and set it up with all the
> other cookers. I was melting pennies making the teacher very nervous!
> Mikek
 
Did you try a nickel or a dime?
Michael Terrell <terrell.michael.a@gmail.com>: Jan 25 01:51AM -0800

On Friday, January 24, 2020 at 9:00:50 AM UTC-5, amdx wrote:
> >> I'm going to try a few things before he spends his money.
 
> Rather than have my neighbor go out and spend his money on a new modem,
> I want try a few things before he spends his money on a new modem.
 
The usual setup is to use a selected tap from the cable TV drop to get the right level. The trough leg must be connected to a set top box, or a 75 ohm terminator. If it is, then see what the insertion loss is for the tap and get one 3dB higher. For instance, if it is marked 17, replace it with a 20. In a former life, I designed CATV systems
"Paul Hovnanian P.E." <paul@hovnanian.com>: Jan 24 03:40PM -0800

One of these:
https://www.cnet.com/reviews/ambient-devices-7-day-weather-forecaster-
review/
No longer produced but I'd like to get/keep mine running.
 
Back story. The broadcast updates seemed to get fewer and longer between
updates. So I unplugged it and packed it away. The story that Ambient and
many resellers had is that they are no longer supported. Fast forward to a
few months ago. I was visiting some freinds a few miles away and they have
an identical unit. Theirs works just fine and recieves updates. So I dragged
mine out and plugged it in. Reception at various locations in my house is
pretty bad. But it does update, just too slow to be useful.
 
The review web site says this uses a "proprietary long-range terrestrial
wireless network". Probably a pager transmitter or FM subcarrier. If I knew
the frequency, I could go hunting for local interference. Anyone have any
ideas?
 
--
Paul Hovnanian mailto:Paul@Hovnanian.com
------------------------------------------------------------------
Ban the bomb. Save the world for conventional warfare.
Jeff Liebermann <jeffl@cruzio.com>: Jan 24 09:40PM -0800

On Fri, 24 Jan 2020 15:40:47 -0800, "Paul Hovnanian P.E."
>wireless network". Probably a pager transmitter or FM subcarrier. If I knew
>the frequency, I could go hunting for local interference. Anyone have any
>ideas?
 
Please post the FCC ID number from the serial number sticker and I'll
see what I can find out about the receiver section. I couldn't find
anything on the device due to the lack of a model number and FCC-ID
number:
<https://fccid.io>
 
If it updates slowly, my guess(tm) is that your unit is experiencing a
high data error rate. There's probably an ECC (error correcting code)
involved somewhere, that takes a few duplicate transmissions to decode
and correct the data.
 
Hmmm... <http://map.myambient.com> is suppose to produce a coverage
map for the weather service. Instead, it produces a text page
suggesting you call Ambient Support.
 
For troubleshooting, see:
<http://myambient.com/productDetail/XDayForecasterSupportPage/serialPrefix/140/>
Check the signal strength indicator in the upper right corner of the
screen. Zero or 1 bar isn't good enough.
 
 
 
--
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
Ted <f6ceedb9c75b52f7fcc0a55cf0cfbf5d_1164@example.com>: Jan 25 04:37AM

Need a flex,ribbon jumper cable 21 pin at 1?x6? in length for Bose AWR1-1W .
When I removed to cover to tighten Antenna adapter ribbon came off. I tried
to reinsert ribbon the the reciprocal the pins got damaged.
 
--
Mike Coon <gravity@mjcoon.plus.com>: Jan 24 06:03PM

In article <21efb3e6-8e77-487f-a5d4-f5dc6be20d7f@googlegroups.com>,
peterwieck33@gmail.com says...
 
> Liquid helium is considered a super-fluid inasmuch as it climbs walls and will go through molecular-size openings.
 
> Peter Wieck
> Melrose Park, PA
 
That is if you reduce the pressure by pumping until the temperature
drops to below about 2°A (see
https://en.wikipedia.org/wiki/Superfluid_helium-4). I remember doing
this and seeing the helium stop boiling energetically and go unnaturally
calm. It was still boiling, of course, because heat was still leaking
in...
 
Mike.
"pfjw@aol.com" <peterwieck33@gmail.com>: Jan 24 10:42AM -0800

On Friday, January 24, 2020 at 1:04:01 PM UTC-5, Mike Coon wrote:
> this and seeing the helium stop boiling energetically and go unnaturally
> calm. It was still boiling, of course, because heat was still leaking
> in...
 
Helium will leak even in its gaseous state. Metalized Mylar balloons last much longer than latex, but they still fail far more quickly filled with helium than with air. The helium diffuses right through the material.
 
Peter Wieck
Melrose Park, PA
Cursitor Doom <curd@notformail.com>: Jan 24 08:52PM

On Fri, 24 Jan 2020 10:42:18 -0800 (PST), "pfjw@aol.com"
 
>Helium will leak even in its gaseous state. Metalized Mylar balloons last much longer than latex, but they still fail far more quickly filled with helium than with air. The helium diffuses right through the material.
 
Hence the need for a helium leak detector mass spectrometer. Anyone
with this piece of equipment NEEDS a HLDMS to go with it.
--
 
No deal? No problem! :-D
etpm@whidbey.com: Jan 24 09:02AM -0800

On Fri, 24 Jan 2020 06:46:08 -0800 (PST), Tim R <timothy42b@aol.com>
wrote:
 
 
>> --
>> http://www.npsnn.com
 
>There are people who use an ozone generator to get rid of mold and mildew smells, especially in warehouses. There are others who claim it it works by numbing your nose rather than killing the actual mold.
A secretary where I worked had to get rid of cat urine smell at an
apartment she rented out. Even after a thorough cleaning of the
apartment involving washing the walls where the cat pissed there was a
lingering odor. She used an ozone generator that was left in place
running for a few days. It worked very well. But some rubber items she
had left on a counter near the generator turned into some sort of goo.
Eric
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