Bagger 293

Kind of local to my area - https://en.wikipedia.org/wiki/Big_Muskie

 

Cell phone signal activity still interfere with my speakers, it never stopped. Did it stop for you or you stopped using speakers with computers?

That post is about magnetic induction making the LEDs light up.

"I've not had any luck getting the stickers to work on a modern phone. That may be because of the different frequencies, or simply the much reduced power that is needed to communicate with the local low-power beacons that have mostly replaced the older high power masts."

 

"I've not had any luck getting the stickers to work on a modern phone. That may be because of the different frequencies, or simply the much reduced power that is needed to communicate with the local low-power beacons that have mostly replaced the older high power masts."

Things have changed from the old Cell-phone days.

 

"I've not had any luck getting the stickers to work on a modern phone. That may be because of the different frequencies, or simply the much reduced power that is needed to communicate with the local low-power beacons that have mostly replaced the older high power masts."

I never had a cell phone LED stickers which were in oval/elliptical shape like in the video. All the cell phone LED stickers I had were about 1.5cm in length and about 1cm breath, and they were different shapes, some were in heart shape, some were two hearts, etc, they lit up for 2G and 3G frequencies.

Things have changed from the old Cell-phone days.
View attachment 263607

View attachment 263606

I never had a cell phone like that. No one I knew had such cell phones. I don't think these types of cell phones were widely available in India. Cell phones became all the rage in India when they became pocketable.

 

So is anyone going to post about crystal radios or should I post that one too.

 

In the theme of this thread, I will nominate Cable Excavators, the precursor the the modern hydraulic digger. The first time I climbed into the cab of one of those, I was overwhelmed by the morass of cables, drums, clutches, shafts etc, all to perform what we nowadays regard as quite straightforward, thanks to the marvels of hydraulics. It was suggested to me once that the use of hydraulics was as big a revolution in the world as electrics, and after much cogitation I'm inclined to agree - there are a lot of parallels.

 

What teenager listening to an ipod would believe you can listen to radio stations with a razor blade and a piece of graphite from a pencil?

A cat's whisker?
But it should not be confused with this type of cat whisker or you'll be in trouble!!!

 

 

Actually they still do! I have and use one...

It is becoming a thing of the past with the New Codeless Ham License FCC requirement.

 

View attachment 263616

Still around even with modern technology. We had one if we hit an iceberg.

https://www.dvidshub.net/news/187384/morse-code-staple-navy-iw-toolkit

 

I actually achieved the grand speed of 12 words per minute in Morse to pass my basic training in the Air Cadets in 1952.

 

Shadow mask cathode Ray tubes... RIP

 

Public Pay Telephones!
When I was a little boy my uncle told me, way back in the 70's he would use a toy bird whistle. A round pipe with the plunger to vary the frequency and if you hit the right tone you can make it free phone call. it was called Phreaking.

 

Public Pay Telephones!
When I was a little boy my uncle told me, way back in the 70's he would use a toy bird whistle. A round pipe with the plunger to vary the frequency and if you hit the right tone you can make it free phone call. it was called Phreaking.

If you want the real stories, Evan Doorbell has a series on YouTube about the phreaking scene in the 70s. I did a lot of the same things he talks about and I also lived in the NY/NJ area so it si very nostalgic for me.

https://youtube.com/playlist?list=PLyqP9X1phbaKEb4gScqjZ50ErTWfknZZx

 

If you're an electronics hobbyist and active on the internet then there's a good chance you're already familiar with this guy but his videos are just too applicable to this thread to not mention. In case you're not familiar with him, he's an eccentric young Englishman who runs a museum and youtube channel dedicated to old school electronics and electronics hacking, with particular interest in telephone systems and music/synthesizers.

 

On the subject of telephone systems, the original decision to use 999 for emergency dialing when all there was was rotary phones was the worst!
For those that have never used one, 9 is the last number on the dial!!

 

On the subject of telephone systems, the original decision to use 999 for emergency dialing when all there was was rotary phones was the worst!
For those that have never used one, 9 is the last number on the dial!!

View attachment 263745

In the US, 911 was established in the late 60a. They chose '9' because it had never been assigned as the first digit for anything, probably because dialing it was unpleasant. I believe the '11' was to compensate for the long return of the dial with the '9'.

 

My City here was the first in N.A. to use 999. ! Not sure if they came up with the 911 instead. ?
Britain-UK was the first with 999. Came about due to a serious fire that killed a few.

 

For those that have never used one, 9 is the last number on the dial!!

We used a finger to speed up the return so we could dial faster.

 

We used a finger to speed up the return so we could dial faster.

Phone phreaks (and some of us who were independently exploring) would remove the governor so they could dial at about 3 times normal speed. The switchgear kept up, no problem.