วีดีโอ

Hi Richard! I would love to talk about an update to my JSE Infinite Slope model 4 crossovers. I am the original owner and would love to take these special pieces to the next level and would be so excited to do a project with you.

At Christmas in the late 1960's, while stationed at Naval Communications Station Nea Marki Greece, we would use our control circuit to daisy chain worldwide Naval Communications Stations (Greece to Ethiopia to Philippines to Hawaii, etc.) together and play jingle bells at all the stations simultaneously during slow holiday times.

THE EMBLEM UNDER WHICH CRYSTALS GO YO WAR

This is such a dramtic romantic film,, even thee intro music brings me too tears of joy. NOT!

It's amazing how accurately Hawaii and Fort Collins are synchronized. Exact. On 15 MHz at night I get the female voice from Hawaii and the male voice from Fort Collins on the same transmission. I keep my wristwatch synchronized exactly to the time clock transmission.

I am in the process of doing the exact same thing with a CCA 1000D transmitter, originally from WKAL in Rome, New York. I have been able to bring it up with about 750 watts out into my home brew dummy load and now in the process of changing the plate tuning and load. The driver tuning was simple and only required a capacitor change but the Pi network is making things interesting. Time to acquire some doorknob capacitors. The original ones were all rated for 10,000 volts at 10 Amps. Perhaps I can get away with lower power ones since I won't be running 1000 watts on the carrier in the end.

A super interesting discussion of AWA. See you at the spring meet.

Brilliant

And now ATT has announced they are permanently hanging up on twisted pair of copper lines. ATT's communications future is only fiber optic technology.

Santa is great for spying on children and giving them toys every December 25th but NEVER let him try to fix a tube radio!

Cool film , thanks! Maybe noted before, notice how it's mostly women doing this precision work.

- bravo!

Interesting, de HR1/K2LCT!

Brazil huh? Explains a LOT.

Is this why a new standard was developed for measuring noise from LED lamps compared to fluorescent lighting?

Its absolutely amazing to see such quality control and pride in your work. These were the times when America was at its greatest

i have a old radio with these frequencies on the dial.when i ever hear a ai voice i have to turn it off and use closed captions . thank goodness the original speaker was on the film. ham here , very fascinating.

This is amazing!

Not a single glove to be seen here

Very informative, nice video from the good old days

Funciona lo probé más o menos aora trabajo a un dispositivo igualmente espero tenerlo listo con un radio galena

This is only the preparation of crystals expected something a bit better than this. To the extent of what crystals were used for this was disappointing. But that's just my opinion. Thanks for video

It was more than decoration it was a fundamental part of the old world tek.

This group of amateurs called “Thighar” in all these years of research never presented any concrete evidence about the missing people. They concentrated on the island of Nikumaroro where there are occasional traces of ancient navigators and scattered rubbish. Everything they presented is forced and implausible. From the confusing and inconsistent radio signals heard by a teenager in St. Persburg, Florida to a supposed jar of freckle cream that we don't even know if she used. They contradicted the concrete evidence, which is the radio log book of the Coast Guard cutter Itasca, stationed on Howland Island, which contains Amélia's last communications in a strong and clear radio signal, near Howland Island at 8:43 am minutes with the fuel already running low. How then did the plane end up on the island of Nikumaroro (Gardner) 404 miles, 650 km, south of Howland? Furthermore, these searches of all these ships and planes were useless because they arrived many days later, coming from Hawaii. Only the Itasca could find something still on the surface on the same day if there was a lifeboat inside the Electra, and if it were possible to remove it through the back door in the water, but no one talks about that.

This was back from a time before radical leftists destroyed America. I miss those days.

What an interesting presentation. Thanks for posting this!

No wonder why crystal radios were so expensive then!

W PRL U TELEFONY FUNKCJONOWALY GORZEJ NIZ W USA W 1919 ROKU BOSTON

I've spent most of my life repairing electronics for underground Coal mining...Most of their telephones until recently used Carbon Microphones in the handsets and I always wondered if a solonoid and carbon pile could work as an amplifier and never knew that this thing was actually done with apparently great success at the turn of the century...Thank You for telling me this

AM radio doesn't have to be nothing but hate speech. Sad,

Wow, an electro-mechanical audio amplifier. So, basically a transformer that can self adjust to audio frequencies, thus amplification was similar to stepping up ac voltage using a ratio of windings. Old tech like this is very intriguing,

Wow!! Amazing...testing , retesting and testing again. What care and precision.

I've fooled around with carbon contact mechanical amplifiers a bit, with appropriately noisy success in most cases. There's a short video of one such setup on my channel.

For some reason the thumbnal us very unattractive. It induces disgust and makes me want to skip the video. Strange.

I thought that active signal amplification took off only with the invention of vacuum tubes.Does the Marconi magnetic detector belong to the same family of " non fully electronic" amplifiers?

Thank you this was a really interesting and well presented video about an almost forgotten piece of technical history. Even better to see and hear it working.

Interesting technology

Robert Did amazing job restoring this ! thanks for the great video guys .

Modern "spark gap" = SMPS .... Where's the FCC regulation now? 73 de W3IHM

Has this been tried under actual antenna conditions? A crystal set typically has a loaded output of a few tenths of a volt with a good antenna and strong station. I wonder if it would actually work for real! I tried to build one of these but in every case the "amplified output" was worse than simply connecting to the speaker directly! Oh well.

Thank you for your very well researched and presented video and thank you for rescuing and documenting this fine equipment. May I point you and your followers to the Porth Curno Museum of World Telegraphy in Cornwall. They have a magnificent collection of repeaters and other telegraphic kit. The Museum is a must see and a short walk to the beach where the United Kingdom connected to the Empire. Best wishes from the UK.

Unfortunately the presentation was not formatted corrected to 16x9 when uploaded to TH-cam The Audubon submitted to AT&T in 1913 was not suitable for use as an amplifier. You underestimated the work AT&T scientists and engineers did to make a successful amplifier.

March 28th, 1983 was the day I left Florida to go to San Diego, California for USN boot camp...😊 *EDIT→* Charlotte, NC? FWIW, I have been living near Elizabeth City since 1995.

Starting at about 13:51 in this video: I bet folks 'back in the day' would be rather amazed to hear _Lynyrd Skynyrd._ 😊

Hi fascinating i did something similar back in the sixties with a balanced armature GPO earpiece and a carbon mic insert all mounted in a thick cardboard tube it worked quite well after a lot of fiddling around...

@WirelessMuseum >>> Great video...👍

The building housing the The First Wireless and Dev Company (1606 F. Street, Napa, CA) is still there. I looked it up on Google maps. Slightly changed (porched enclosed), but you can clearly tell it's the same building.

As a electronics repair tech (now retired) I love old technology like this. Thank you for sharing this.

Seeing the DC bias makes me wonder if a higher than audio bias frequency might have been an area to explore.

The amount of patience required to restore delicate equipment like that must be astounding. Excellent work!