- Ahmed Mohamed - 1 Update
- Hand-Held Megaphones: Rubber ring around edge of Horn - 2 Updates
- Video projector sync problem - 2 Updates
- Are all low-end 900 Mhz speakers interchangeable? - 1 Update
- Dandy Dapter info needed - 2 Updates
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." |
You received this digest because you're subscribed to updates for this group. You can change your settings on the group membership page. To unsubscribe from this group and stop receiving emails from it send an email to sci.electronics.repair+unsubscribe@googlegroups.com. |
No Response to "Digest for sci.electronics.repair@googlegroups.com - 8 updates in 5 topics"
Post a Comment