Digest for sci.electronics.repair@googlegroups.com - 8 updates in 5 topics

John-Del <ohger1s@aol.com>: Nov 24 07:07AM -0800

Looks like the little terrorist is still in the news:
 
http://www.bbc.com/news/world-us-canada-34904226
 
And it gripes me that news stories still refer to the pseudo bomb he brought to school as the clock he "built".
 
And did the Secret Service let Little Mo bring that "clock" in to the White House without inspecting it carefully to make sure there was no C4 behind the LCD screen?
 
If this punk and his father have a case, what about the kids that got suspended for pointing a Pop Tart like a gun?
 
 
 
 
 
 
 
On Friday, September 25, 2015 at 6:44:03 PM UTC-4, Seymore4Head wrote:
thekmanrocks@gmail.com: Nov 24 04:36AM -0800

Hand-Held Megaphones: Rubber ring around edge of Horn
 
 
Besides performing the obvious functions - protecting
the horn from damage, and preventing the appliance
from sliding around(on hoods of cars, on rocking boats) -
does this ring augment the sound coming from the
megaphone, in any way?
 
 
I read somewhere, pre-internet, that it DID, and a diagram
was provided showing the propagation of sound from
megaphones both with and without this rubber ring on the
edge of the flared horn. Cannot seem to find it nowadays.
 
 
Anyone?
N_Cook <diverse@tcp.co.uk>: Nov 24 02:01PM

> megaphones both with and without this rubber ring on the
> edge of the flared horn. Cannot seem to find it nowadays.
 
> Anyone?
 
Or do you mean a rubber acoustic barrier between the speaker part and
the microphone part, to avoid microphony?
mroberds@att.net: Nov 23 09:10PM

> I'd like to eliminate a problem of syncing between pc and projector
> firstly.
 
What was the connection to the PC - VGA, HDMI, other? VGA has separate
sync signals, and an intermittent cable or connector might cause
something like this. People often bend the last few inches of a VGA
cable quite a lot, if (for example) the connector is on the right side
of their laptop but the cable needs to run off to the left. Sometimes
they will set their laptop on top of the cable, which might cause
intermittents to show up if they use the keyboard or trackpad during
the presentation.
 
If the projector was on the ceiling, with a cable routed through the
ceiling and wall to a socket on the wall, maybe that cable is going
intermittent.
 
Matt Roberds
N_Cook <diverse@tcp.co.uk>: Nov 24 09:04AM

> ceiling and wall to a socket on the wall, maybe that cable is going
> intermittent.
 
> Matt Roberds
 
That was quite possible. In a public meeting , so was not able to fully
explore at the time, VGA connection. The information was there in the
image, just parts of it were breaking. The VGA socket of the speaker's
laptop looked as though it had the remnants of a sandwitch or something
on the VGA socket, which I wiped away before connecting. In the break I
powered down and reseated the connectors but , as male to male lead, I
did not think of reversing the lead, continuing problem to the end of
the talk.
The problem never returned with trying with 3 other laptops
Micky <NONONOmisc07@bigfoot.com>: Nov 23 05:40PM -0500


>If you don't need stereo, get a low
>Power fm transmitter and you can use
>Any ordinary fm radio to receive.
 
Thanks for the suggestion.
 
Not ready to start from the beginning now, but last night I found 2
speakers with 2 adapters but no transmitter for 25 Craig's list. Only
12 miles from my house, straight shot.
 
They were Optimus but they looked almost just like some Advent
spearkers advertised and when the RCA Xmitter broke early on, the
vendor gave me an Advent Xmtr, so sure enough the Optimus speakers.
 
Much louder than the originals and with a Left, Right, Mono switch
which is nice. Otherwise the same controls.
 
I'll find another xmitter before this one breaks. Maybe I can fix
the one that already broke.
Michael Black <et472@ncf.ca>: Nov 23 12:55PM -0500

John Robertson <spam@flippers.com>: Nov 23 10:51AM -0800

On 11/22/2015 10:54 PM, Ken Layton wrote:
 
>> Perce
 
> I never was able to locate an actual Dandy-Dapter, but some kind soul did email me the Instruction and Set Up Manual several years ago (in a pdf format).
 
> Yes, I still have occasion to use the B&K 467 since I still service arcade game monitors.
 
That was likely I. I tried to track down the company and owner of
Dandy-Dapter back when this first started, made calls to the city phone
directory, etc. even sent a letter to the last known address. Was
completely unable to contact the fellow so I send Ken a PDF of the manual.
 
The Dandy Dapter was mostly a chart of picture tubes and the required
connections using his tool - which was a series of plugs with labelled
grabbers that hook onto the pins of various picture tubes for testing.
We bought the kit back in the 90s for our shop and still use it from
time to time when we run across a tube that we haven't got a factory
adaptor for our B&K rejuvenator.
 
If anyone else needs a copy please let me know and I'll send it along.
 
If the original owner, Mr. Dandy or his estate, turns up I will happily
stop supplying copies - however at this time I consider this fits under
Fair Use of the copyright law (in Canada). Plus I am not charging for
the information.
 
John :-#)#
--
(Please post followups or tech inquiries to the USENET 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."
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