Big Power! 14000 Watt 892-R Transmitter Tube - Will It Work? Power It Up!
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- Опубліковано 23 вер 2024
- Big blower cooled 14000 Watt transmitting tube! The 892-R gets filament power, 60 Amps worth! Will it come to life?
To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: / mrcarlsonslab
#restoration #electronics #repairing
To learn electronics in a very different and effective way, and gain access to Mr Carlson's personal designs and inventions, visit the Mr Carlson's Lab Patreon page here: www.patreon.com/MrCarlsonsLab
Big-eyed thumbnnails are really not your style. I'll unsub if it continues. Just saying.
WHAT A SHOW!!!! I have a toroid transformer setting on my kitchen table I hand wound about the size of your variac Mine may be a little bigger its hooked up to a home made pure sine inverter Low freq DOSE NOT mean it has to have high idle current The last inverter I built had 60 or 70 pound toroid transformer and the idle FULLY POWERED up ALL power from battery bank was around 20 watts If you don't know the secret of low idle and silent zero hum with ear on tranny it would surprise me But I don't mind sharing this info My name is Ben this is my wife's youtube A EE friend of mine after a year of using a tranny wound like I speak of told me he cant find any loses Even though it definitely has them he says it powers his whole zero grid home He has redesigned almost EVERY thing at his place to run off batteries Yes even the pcb and screen of his microwave LOL He also designed and wrote the programing for some of my inverters I tell you truth 4 or 5 years ago he had a new update for me to try He made my inverter have a built in oscilloscope He did it form a wifi update He lives few hours from me I am like forrest gump self taught nothing like you or him I very old EE from the land down under would NOT give me the answers about winding transformers I wanted I think he knew exactly what is was doing but never has said so I like forest gump fingered out how to get such low idle when winding trannys Sorry so long wish you was my neighbor I am SURE you know and have many cool stuff you have built to tinker with lol
Patreon is taking my $ but I cannot see your videos
интересно а где использовались такие лампы ? :)
I thought the Tube would light up as bright as the sun I guess you would need to boost the power some?
Who needs The Voice of America, we can now have The Voice of Mr Carlson.
Well said, and he speaks so eloquently in layman's terms, he doesn't need to speak in "Special English!" Lol!
He's Canadian.
It looks like a scene from the movie Back To The Future. 😁
We'll see him on 15m SSB with this PA tube soon 😂. He'll be able to compete with the Cubans and their old Soviet transmitters.
@@orbitingeyes2540 Unfortunately that is highly illegal. The most legal thing he could do with it is using it in an RF heating system.
This channel never disappoints. "Thats not a Variac.... THIS IS A VARIAC"...
I wonder if it used to be a dimmer for a theater.
There are even much bigger VARIACs 🙂 They run on all three phases here in Europe an are capable of 10+ kVA. They are very useful as universal AC variable power supplies.
....and then some !!
*This channel is a National Treasure and this video should go viral.*
1200W for filament, 600W drive... 14kW output. The highly efficient vacuum tube is not to be underestimated 🤣
It is more efficient than an op-amp.
Source?@@samuellourenco1050
Don't forget about the 18,000W plate power. 1.5A at 12,000V.
@@stargazer7644that's only 6 microwave transformers in series. 😂
What did Mr Carlson do for a living before producing UA-cam videos.This guy seems to have a vast amount of electronics knowledge. Thanks Mr. C.
And $$$$ 🤪
I probably never would have known a tube like this existed much less witnessed the filament light up if not for you Paul. I really enjoyed watching the process. Thank you.
Nor I. I would never have thought welding level currents and voltages would power a vacuum tube!
Glad you enjoyed it Michael!
That's still a little tiny tube. The big tubes were used in shortwave transmitters that put out 1MW or more.
@@rocketman221projects Would you know where a person could see pics of these huge vacuum tubes?
@@OldWrench59 Search for pictures of the Eimac 8974. It's a big tetrode that takes over 20kW just to light up the filaments. It's surprisingly small for a tube that can put out over 2MW of RF.
12 kv!! Mr Carlson, I'm a NERC certified transmission operator for a Midwest power company. I started in distribution. Most of our distribution lines are 12kv phase to phase, 7.2 phase to ground. The thought of you putting 12 kv on that tube in your shop gives me the willies!! I love your videos. When I was a teenager, I wanted to have your knowledge of electronics. Keep up the good work and be careful!!!!!!
I guess you had absolute heart attacks back when we all had TV sets in our living rooms with 20-40,000 volt power supplies in them.
12kV DC
I used to make tube amplifiers - I stopped when I gave myself a 485V DC shock. I figured ADHD and high voltage just dont mix well
@@stargazer7644 - there is a HUGE difference in the output power of the CRT anode supply and the voltage needed to drive that transmitter tube. Yes, in both cases the voltages can be lethal, but the power that will be supplying that transmitter tube is higher risk.
@@stargazer7644 I have made mistakes fixing old TV's and felt the eht (25Kv) off the cap of a CRT. Makes you hop and probably not good for a weak heart, but no real current capability via the tripler and eht rectifier. A little more painful than a car ignition jolt. If Mr C puts 12Kv on the anode of that tube it can pass 1.5A. You won't say ouch if you get across that. You will pass a killer current in no time at all. Only the really old TV's which derived the eht 10kv or less directly from a transformer winding could pass enough current to be potentially lethal. Those tests if they involve high anode voltage and current capability should be setup behind a faraday cage in what we called a rubber room.
I patiently await the unveiling of this tube- mounted in a Delorean!
He will be going to be having had done that in no time
Collaboration with Applied Science? Between the two, and the DeLorean, they could make it work.
Time travel 😮
1.21 Gigawatts... well, that's about the total input power in roundly exaggerated numbers. 😂
@@orbitingeyes2540 I think Mr. Carlson's safety goggles were a tribute to Dr. Emmitt Brown.
A standard linear valve for a Italian QRP CB Operator lol
beautiful signal my friend
@@toruscore 58-59 TY 73
Or just a fraction of the power the guys on 3950 run....
HAHA! Amen! If i had one id try. Had to settle for quad GU-81Ms instead. They are just barely manageable and that’s being optimistic lol.
@@neonhomer: Or Channel 6 on 11 Meters. 10-4/s
Are you related to Emmett Brown? Definite shades of the mad scientist here. It'll be a flux capacitor next. 🤣
I once maintained a military radar system that used a traveling wave tube the size of my leg to drive a Klystron tube final amplifier that was bigger than me. The Klystron was in an enclosure the size of a small car that provided magnetic shielding and allowed liquid cooling. Voltage levels in the enclosure were so high that the conductivity of the ethylene glycol based coolant had to be monitored to prevent shorts through the cooling circuit. When the transmitter was tested into a dummy load (itself an impressive device), it sounded like a metal garbage can full of angry steel hornets. Fun times!
Angry steel hornets.....quite the image evoking metaphor. Kudos !
This is one of the the BEST channels on all of You Tube.
Thank You Raymond!
I like how You never treat People condescendingly You are a Fantastic Teacher and We all enjoy Your Projects which I could have been an assistant with You, Great projects and learning experiences.
Thanks Mr. Carlson
You are so welcome!
Fantastic. Biggest Variac that I have ever seen. Very unique Video !
Yeah I thought I had a decent beast over there in the corner... that thing is absolutely massive. But when you need it you need it... And "warming up" 🤣
We have 'one' of these at work, but in 3-phase configuration for 3x230V, the sections are 115V each, that means a tower with SIX of these on top of each other with a common shaft, driven by a motor. Now *that* is a beast. IIRC it can do 3x230V, about 100A per phase maybe. I don't remember the brand, but it's US made, some time in the '60s or '70s.
A few lifetimes ago, like in the mid 70's, I was able to take a tour of the transmitter building from our local 50,000 watt AM station (WPTF). These final amp tubes were HUGE, I seem to remember them being almost as tall as I am.
It was cool seeing this big old tube fired up and what all goes into it... that's a LOT of power for just the tube heaters! Great stuff!
Thumbnail alone is gonna bring new people to the channel
If you are following along at home you are doing so at your own risk. (causing a power outage)
Very true or breaking the Bank with your Power Bill
Not at this stage. 22V * 56A = 1.176kW, that's less than half what my kettle pulls (2.5-3kW)
I had a wood products company in the 90’s. I was able to find an old high frequency gluing machine and it had a huge tube similar to the one you have. I could cure 4 inch thick butcher blocks in a couple of minutes!
I remember those machines.
If Mr. Carlson is wearing PPE, you know it's about to get REAL!
Well now, in the 70's, I worked in a radio station that still used tubes so, this is fun for me...Thanks
Glad you enjoyed it
The design engineers for high power vacuum tubes in the early days "20s-30s" are amazing people. ✨😎 Thank you Mr. Carson for a great video.
Mr. Carlson you are a unique individual
Dr. Frankenstein would be proud!
Thank you for your videos, and for having the absolute best tech channel on the net.
At work we used a radio frequency dryer for sewing thread. It developed 30KW of RF at around 27.125MHz in the CB/ISM band. It was water cooled with the anode strapped to ground and the heater cand grid circuiits 'floating' negative with respect to ground. .A BIG triode that had a heater rated at 10V@240Amps. It was a BIG metal cased triode. I can't remember the anode voltage bit it was many KVs. One day, one of the hoses supplying cooling water came adrift spraying the RF deck with water (demineralised!) . The results were quite spectacular and the valve was destroyed pretty much instantly. The oscillator was a simple free-running type. Amazingly for me at least, I couldn't detect any RF leakage at all using my Kenwood R2000 HF receiver placed near the metal cabinet when the machine was running. The internal RF screening was superb with a lot of finger-stock and brass brush seals.. It was a carousel type dryer with the RF fed into a chamber at the rear of the machine to dry the thread which was wound onto 'cheeses' and stacked vertically in threes, with teflon spacers between them and a teflon top cap.. Vacuum was applied as the drum carrying the 'cheeses' entered the drying chamber which helped to force water out. 30KW of RF did a great job of drying the thread! When it failed, replacing the dead triode was interesting. The new triode arrived in a large wooden crate packed in straw. Ww used a forfkift truck to lift the crate over to the machine where we unpacked the valve and shoehorned it into the machine using the forklift truck.. These big transmitting valves are designed to be repairable. Thay can be taken apart and refurbished. I never did find out how much the new triode cost, but was glad the company was paying for it.
I desperately need to see experiments with that giant tube. Huge tubes and huge power supplies are where it is for me
Big explosion get a lot of attention but I prefer big power being controlled, there is not much challenge in just releasing it
Felicitations for a fabulously fulfilling filament fire up. The suspense was palpable as you slowly turned the big vice grip handle. Now I can't wait to see what amazing things you will do. I commend you for wearing personal protective gear.
I seem to recall a video with a high power AM transmitter using this same tube. They emphasized the importance of cooling, ramping up filament current slowly, and most importantly, never applying plate voltage until after the tube was fully warmed up. They also mentioned the very high cost of these tubes.
I love the way this channel is heading. Thanks and that makes a great room heater. In winter you're heating the room anyway so no power is "wasted". Take care!
As a former Gates Radio employee these types of tubes (vapor and forced air) were fairly common. They were impressive !
I still love my old BC-250GY!
Well, you have the coolest shop heater in North America !!!!
So much fun to watch, that had an element of suspense! I maintained AN/URT-23D HF transmitters while serving in the U.S. Navy and remember working with the high voltage Eimac vacuum tubes. I am also a ham~KA1WHT. Looking forward to seeing more!
You are a Mad Scientist, Paul! Love it!!!
Possibilities?
Pirate radio? Anti asteroid Lazer? A one second fully cooked turkey?
Thank you for the lesson.
Possibilities? Jail for any of those proposed uses.
@@MrShobar When was the last time someone has been arrested for cooking a turkey with a vacuum tube?
@@CaptainRon1913 It's not the cooking. It's the RF emission level.
Reminds me of the guy that poured liquid oxygen on his charcoal to get it started. Fastest start ever, but also shows up on the satellites that watch for clandestine rocket launches.
I admire your courage, you are a superhero!!!
I always suspected that you were a mad scientist. Now I have pictures!
I am building a 160 - 10 Meter amplifier with a pair of grid-driven 4-1000A's in class A, push-pull. It won't be super efficient; but I make my own electricity, and I absolutely love the glow of glass bottles with cherry-red plates!
Push pull is not class A. It's probably class AB. Neither tube conducts over the entire cycle.
by far the best electronics teacher on youtube fascinating stuff 🌠
My wife is on me all the time for the electric bill being high when I run a few 3d printers and my big screen from time to time.
I can’t imagine what your power bill could be. Definitely gonna do my part on Patreon though I doubt I’ll put a dent.
I wouldn’t be surprised if you had your own hydroelectric system or geothermal operation.
Thanks for all you do for those of us still learning, it’s more helpful than you know.
There's a UFO flying over, and it it's yelling "TURN IT OFF!!!"...
This was great Professor Carlson. I even felt like a mad scientist just watching this, lol. Thank you for sharing this gem of a tube!!!!
Glad you enjoyed it!
Should have a Geiger counter next to that as well. 😂
892R has a pure tungsten filament - that's why it uses 1200+ watts and glows so brightly. Slowly bringing up the voltage and current is necessary because the tube specifications say the filament current must never exceed 120 amperes (!).
The 1964 Newark catalog shows the 892R priced at $425 US - about $4300 in today's money. They were so valuable that burned-out ones would be sent back to the manufacturer and rebuilt.
Tube data on the 892R and its water-cooled version 892 from several manufacturers is on the internet in several locations. Take a look - they're impressive.
WOW that's some tube, Paul. Thanks for sharing.
A long time ago I was a tech looking after a critical computer system using hundreds of valves. (tubes). We understood that the thermal shock of powering on and off the heaters is what reduces the MTBF of tubes. Best practice was to leave the heaters on all the time, but if we had to power off the heaters then slowly reducing the power was as important as slowly ramping up power. Nice to see Mr Carlson following this.
The technology that once made the world go around is truly fascinating.. thats so awesome.
That was amazing well done Paul. Never seen this big a tube ever.
the tube will make great winter projects
Who else could not wait for Mr. C to identify tube design? I made it to 6 minutes until I had to check datasheet. It's a Triode.
the total amount of terminal/pins should have told you that right off. 😉
What a cute, little transmitter tube! In the 1980s, I did the maintenance & repairs for a Harris MW-50A 50 KW AM broadcast transmitter. The PA final was an Eimac 4CX35,000, and the plate P.S. was 24 KV. The xmttr came with a screw operated jack, for putting the tube into, or removing from, its socket. Of course, engineers who have worked on 500 KW shortwave transmitters would consider that 4CX35,000 to be puny.
Back in the mid 1950s the Pennsylvania Railroad purchased new electric freight locomotives to operate on their electrified divisions. They had water cooled rectifier tubes in them to convert the 11,500 volt 25 Hz AC line power to DC then to transformers to run the 600 volt DC traction motors. Yes, water cooled tubes on a freight train traveling at 50 mph. They lasted in service for about 30 years. The tubes were massive.
The locomotives lasted thirty years, not necessarily the rectifier tubes.
This is so interesting to watch, as all of Me Carlsons’ videos are.
I don't ordinarily expect edge-of-the-seat adrenaline packed race scenes on Mr. C's Lab. I love the Jim-Bob Walton in his flight glasses fear factor of this one. I normally come here for a nice instructional gee-wiz session of electronics fix-it relaxation. This was nevertheless an excellent departure from that norm. This was the Dr. Jekyll of Mr. Carlson in its finest. What fun! I can't wait to see you add the 12+ KV plate voltage! Yow!
very cool! so nice to see foreign vacuum devices of huge power. thank you.
14kW is huge power? This would be on the lower end for broadcast tubes. I've seen tubes that operate at 500 kW.
@@stargazer7644 this is great. did you make a video about it? where can i see what you saw?
@@Lordbl4 Just google for 500kW tube.
Wow - that was absolutely amazing! Looking forward seeing the experiments with it.
Makes me want to break out my 4CX5000A and build a resonating cabinet for it.
I remember maintaining a transmitter that used a set, with individual filament transformers rated at 150 amps. Mains power was stepped down to 5 volts, and the tube took whatever current it needed. They center-tapped the secondary and tied it to ground for the valve circuit. Running that thing was a blast! 25,000 visual watts
Now! That was interesting.
If you build an RF power amplifier using that tube, you’ll have a heat source to cook your lunch while you’re using the amplifier!!
this kind of experiment is great do do on a winter day
Mrister Carlsons lab 73s to you and your wife my friend
Incidentally, the only real surprise of this episode: @5:05 I was sure Mr. C. was going to say, "and I have measured and this custom battery connector by coincidence fits the filament pins of the 892-R precisely, so I will be plugging it right in"
The thumbnail looks like you just got a jolt. Thanks for another good one.
I had the good fortune to tour the KDKA (AM radio) broadcast transmitter site back in the 80's. The tube finals that powered the 50kW Westinghouse broadcast transmitter are works of art. That site is it's own distribution substation with multiple transmission feeds to keep it alive too.
Wouldn’t it be fantastic to interview Paul’s mom!
Mr. Carlson. This is your "time". The World is Your Oyster! (Whatever that means.)
Everything electric, is everything. Your subs are going into Mega. The masses will be scrambling for your knowledge.
I remember seeing a huge vacuum tube made by Eimac. I saw it when I visited a VOA transmitter site here in the USA. It was not in service. It was on display. The tube was a 8974 and made of metal and ceramic. It has a height of 23.75 inches, a diameter of 17.03 inches, and weighs 175 pounds. It contains two directly heated
filaments rated at 16.3 volts at approx. 1300 amperes for both filaments. The anode is designed to dissipate 1.5 MW. The tube may be operated as a class C amplifier where a single tube with an anode voltage of 22.5 kV DC can provide up to 2,158 kW of RF power!!
That was the largest transmitting tube ever produced. Some of them were used in particle accelerators. Continental Electronics apparently made transmitters using these tubes which were used in wide area AM broadcast at up to 1MW- they use two 8974s, one of which served as the modulator.
10:05 IT’S ALIVE! a la Dr. Frankenstein.😂
It appears that four of these tubes could operate a 50kw AM station! WBZ 1030 is a clear channel out of Boston that reaches half way across the USA. It is now all talk and info, but in the sixties a top 40 AM power house. Thanks for the exhibit, Paul!
Nice job firing this baby up! Dwarves my Tesla ZD1000F transmitter triode, the biggest one in my collection, with 1kW plate dissipation and 250W on the heater.
"You call that a vacuum tube? THIS... is a vacuum tube."
That variac is by far the biggest one I've ever seen. You could try adding a motor with worm drive to it for remote control.
Who needs a cliffhanger when we all can watch the wonders of a high power tube and all that it takes just to light it up!
In the 1940's the RCA BTA-5F 5 KW AM broadcast transmitter used 3 892-R tubes, 2 push pull AF modulator and 1 class C RF output tube. You could open the front panels and literally step inside.
I worked for a station that had a BTA-10F 1947 10 KW transmitter. Four 892-Rs, two in the Final and two modulators. Kept the building warm in the winter.
Dr. Who has nothing on you! Or Rick Sanchez...
Also the eye protection is a fantastic look.
That has got to be the spiciest piece of glass I've ever seen. I'm excited to see what experiments you have in store for it!
Wow! At full current with lights off it looked more like a kerosene heater! Great Video! Thank you.
That is just amazing. Holy moly the power output 14,000 watts. I must admit I would prefer you to be operating that variac behind a 3/8 inch piece of Lexan. You make my heart beat a little faster when you're that close that glass MONSTER!
Vacuum tube, such a SIMPLE yet GENIOUS invention. A lot of R&D went into it for sure.
This test reminds me of Photonicinduction experiences! Crazy cool stuff the guy did! Keep on the good work! Thank you!
Yeah I was thinking of that guy too. Just need some capacitors like paint cans and a mercury rectifier or two. Oh and just set it up on the carpet in your living room. He hasn't posted in a few years, I hope he is well.
@@onesandzeroshe is ok. He appeared recently on another channel swapping some parts.
Glad the tube is still good, because now comes the experiments.👍👍
Beautiful stuff Paul !!! Please go on
Totally awesome, that this actually survived all these years is amazing. I guess it didn't go through many hands then, likely being in a Mr. Carlson's look-a-like lab before. :)
somewhere in the world, there's likely some of these still in daily service!
This will be great around Christmas time with friends and family all snuggled around the tube to stay warm this Winter.
Not shown: The 8v92TT genset out back powering this monster!
Excellent video and test. Thank you, Mr. Carlson.
These are the kinds of electronics whose tools crossover with automotive hobbies haha. Most i've used from my garage was an 8mm for SMA connectors :)
Great video!
I see a Marconi 2955! I was gifted one of those but with a bad flyback. Instead of hunting down a flyback, I did the LCD conversion.
I just used it today actually. Re-aligned the front-end of a Tait T835-20 receiver module converted from VHF high to 136-148. I broke my first couple RF slugs. Lesson learned! Fortunately I found some replacements!
73 from VE9 land!
I really enjoy the demos of lesser-known industrial electronics and components. After experimenting with kv plate voltage and current, perhaps you could demo the other definition of ‘grounding’ when Mrs. Carlson sees the power bill!
So very interesting, thank you so much for sharing this Larry Owens
i like the new thumb nails for the videos
Thanks!
Thank You!
And as he powered up the tube, the neighborhood lights went dim😂. Thank you for sharing!
wait until he actually tries making RF with it, after adding all the circuitry and plate voltage. lol
I'm just wondering what kind of dummy load he'll come up with to hold any of the power.
Not really - only 1200 watts, about the power demand of a microwave oven. With a suitable transformer and a 10 amp variac, you can light the 892R filament from a 120 volt 15 amp branch circuit (if there's nothing else on that circuit).
But using 240 and the big variac is just so much FUN!
Why do I get the feeling when Paul was a kid his mom often said to him, "that's fine son just don't burn the house down"?
I know my mom would and did say that!
In the middle of rebuilding my Cerwin Vega crossovers… work is at a dead stop for the next 16 minutes! 😂
Glad you enjoyed Shawn!
Very interesting to see that tube 'come to life', very neatly done👍🏽
Great video, I'm happy to see the tube is working, no magic smoke. Great projects are coming. 👍👍👍👍👍
Thanks 👍
"Wall" behind You...very impressive.
Mrister Carlsons lab you are good at restoring antique radios and alignment of antique radios my friend
That thumbnail 😂
You look like a cartoon character man! 👍🏻
Studied electronics in high school wound up being a carpenter still have a facilitation with electronics thanks for the great videos
This is so cool! I love stuff like this. Glad it worked out.
Fascinating departure from your normal videos! It was very interesting to see you outside your normal box\bench out in the garage with a cobbled together experiment. Thank you. I enjoyed this video.
Glad you enjoyed it!
@@MrCarlsonsLab For one awesome year, I was gifted the job of teaching middle school kids basic electronics. The art of teaching as you do is not easy, but if you love it like you and I its very fun. I can see your enthusiasm as I had too. I taught my students the basics and we built things not on any list or required instruction. I got to see these kids open their minds to possibilities and ideas, where in the beginning of the class there were none. I hope you keep the joy of electronics going for all to experience.
Great project Mr Carlson.
Thanks Dave!
I've been a ham for many years and I've built many amps. 4-1000A was about the most intense because of the extremely high voltages but that would just be the driver for this one! I'd love to see you experiment with that colossal tube. I'll be looking out for more on this and other great instructional videos. Thanks!