Digest for sci.electronics.repair@googlegroups.com - 7 updates in 3 topics

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 25 09:30AM -0500

Arfa Daily wrote:
> chemicals. I had one and it lasted years and years. When it ran out, I
> really mourned as I was unable to find it still for sale anywhere. As soon
> as Crimbo is out of the way, I will be ordering a can ! :-)
 
 
I took a quart glass bottle to a local print shop and they filled it
with platen cleaner for $10. They buy it in 55 gallon drums. Smaller
shops buy it in five gallon cans.
--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 25 09:35AM -0500

Tim Schwartz wrote:
> flywheel with some epoxy so it stays where it it supposed to.
 
> If this is an F44, contact me off-group. I might have a manual for the
> thing somewhere in the archives.
 
 
I saw a lot of loose flywheels on cheap 8-track tape decks around
1970. We would pull the capstan and flywheel, then use a small center
punch and hammer to put four equally spaced dents near the capstan, on
the bottom side of the flywheel.
 
 
--
Anyone wanting to run for any political office in the US should have to
have a DD214, and a honorable discharge.
Sam Seagate <saseag44419@yahoo.com>: Dec 24 04:12PM -0500

A couple of years back, I made some window candles for the house and one
candle for each window. Each candle light is a cheap LED bulb that I
pulled from a string of LED candle bulb lights that I got at the local
Walmart. Problem is that my wife, who I made these for, doesn't like
the dimness of the result and wishes for brighter candles. Initially,
before starting the LED project, I tried standard candle incandescents
but since the candles are in front of curtains and blinds enough heat
was generated to start burning them so I came up with the LEDs.
Yesterday, I tried increasing the current to one of the LED's (from 17
to 35mA) and the brightness doubled but still far short of neighbor's
incandescents.
 
So, I could replace the LEDs I guess with 5 W equivalent LED ones I see
on the web these days, but they seem expensive. Are there any candle
incandescents that burn cool especially when up against something like
curtains?
 
Thanks!
dplatt@coop.radagast.org (Dave Platt): Dec 24 02:26PM -0800

In article <m7fa6s$bkp$1@dont-email.me>,
>on the web these days, but they seem expensive. Are there any candle
>incandescents that burn cool especially when up against something like
>curtains?
 
Incandescents are all about the same efficiency (10% or so) with the
rest of the power going into heat. Halogens are a bit more efficient
but not by all that much.
 
The LED "candle" bulbs I see listed at Home Depot are 25-40 watt
"equivalent". If your neighbors have incandescents of a similar light
output then they're probably dissipating about that much heat, which
is not something I'd want to have pushed up close against a curtain.
If the curtain got snagged over top of the bulb you might have heat
damage to the curtain, or possibly even a fire after a while.
 
Candle bulbs have small bases, and can't be dissipating much of the
heat that way... almost all of it must be coming out through the
envelope. They're gonna be toasty.
 
I believe the pricey "5 W equivalent" LEDs you are referring to, are
actually "5 W consumption". They put out a whole lot more light than
a 5-watt incandescent bulb... these are the LEDs used in tactical
flashlights, which on full power can be quite blinding.
John-Del <ohger1s@aol.com>: Dec 25 05:34AM -0800

On Wednesday, December 24, 2014 4:12:22 PM UTC-5, Sam Seagate wrote:
 
> on the web these days, but they seem expensive. Are there any candle
> incandescents that burn cool especially when up against something like
> curtains?
 
Check ebay; you can find LEDS in any size, color, and power you want. Very cheap, but they'll take a couple of weeks to get from China.
John Robertson <spam@flippers.com>: Dec 24 10:11AM -0800

On 12/23/2014, 7:24 AM, Jeff Layman wrote:
> switch, and the other pole was unused. So I just soldered a wire bridge
> across to the unused pole, and the switch now works perfectly again.
 
> But how long that pole will last is another matter...
 
Well, considering that WD-40 is a rust inhibitor it is anyone's guess as
to how long this will last.
 
WD-40 dries up over time and turns to goo. Good luck!
 
John :-#(#
 
--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Phil Allison <pallison49@gmail.com>: Dec 24 06:54PM -0800

John Robertson wrote:
 
> Well, considering that WD-40 is a rust inhibitor ...
 
** Only so because metal objects covered in oil tend not to rust or corrode since atmospheric water and oxygen are largely excluded.
 
WD-40 is more correctly characterised as a hydrocarbon grease solvent that also lubricates.
 
> WD-40 dries up over time and turns to goo.
 
 
** No more than a light mineral oil does.
 
 
... Phil
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