Having worked in electrical engineering for the most of my fifty year working life, I used multi-meters nearly every day. I can say that you are the only person that I have ever heard call the resistance range the 'horse shoe' range. Hahahaha.
They radio dynamotors, or rotary transformers for old tube radios some are for the transmitter portion, and smaller one for the receiver. They step up the voltage for the tubes, or valves on airplanes, or boats. I have one that’s a bit of an odd ball it’s military, haven’t been able to find much on it, but just based of its size at out put for watts when you do ohms law it’s probably for the receiver portion to what ever radio it went to. They are fun interesting pieces of history, there essentially an early inverter though also know that there were different versions that were AC, or a kinda of dc output( really it pluses because of the switch commutator, which was herd in the radios.
I just remembered why I subscribed. One is for the crazy contraptions and the other is because you remind me of Phil Harding from Time Team. Without having watched that show for many years, I may not be able to understand you so well. It's a very unique brogue.
When I was a kid I bought one of these at an electronic second hand store, I had a 1/4 hp motor and an old car 1 2v generator along with a tripolet multi meter to do experiments priceless knowledge I'm lucky that I did not kill myself shocked many times that was around 1961 or 2
I owned one when I was a school boy in the late 60th, a classmate found it on his father farm in a tool shed. It was used for a mobile radio transmitter of the german army (Wehrmacht) , it put out 1000V at 150mA from a 12V battery. I used it for electric fishing on a little lake near my place. And yes I was zapped , a very painful experience. Later it found a job for a homebrew CB power amp with valves. The german designation for such dynamotors are "Umformer"
@14:56 - "In new money..." I swear that I just heard this term for the first time on a Time Team episode a few days ago. They compared a measurement using old/new money and I thought that was very interesting. It's equally odd to hear it here in Phil Hardings voice.
Those machines are called "Rotary Converters" the part the brushes are in contact with are called "commutators". Way back they would be in all sizes up to hundreds of kilowatts. I have a 1920's book with pictures of them in very large sizes used in DC mains supplies. That rotary converter would have been on a mobile radio transmitter with the 240 volts on the intermediate valves and the 500 volts on the power output, the voltage would be correct only at the rated load so the bulb you have is not a big enough load to pull the voltage down to 250 volts. I would buy it from you, say £20..
That is designed to provide power for a radio. Those generally date to WW2 and the most common ones are from aircraft radios, but they generally operate on 28 volts. That one being 12 volts is more likely a land vehicles radio supply.
@10:50 - "Horseshoe mode" I worked with a chap who was actually my boss. He always said "Horseshoe Mode" and "u-mode" for microamps and such. He wasn't trying to be funny though, he was just a bell-end.
Adam, that rotary convertor or transformer would have been used in a WW2 military vehicle for powering a receiver/transmitter, those voltages are I believe for a 19 set. DO NOT TOUCH THEM AS THEY COULD WELL MAKE YOU DEAD!
Only to use with (military) radio-gear (using valves) Totally not fitted for regular bulbs as the current (miliamps) delivered at the High voltage side is WAY too low. Just good enough for LED (to test) It will probably deliver DC ... not AC. They are called "dynamotors" and were commonly used during WW2
@@NorfolkMancave I don't understand what you mean with "draw" ... Probably "current-draw". Those dynamotors normally produce 2 high voltages ... one (quite high) for the transmitter-tube ... mostly about 500VDC. And a lower "high-voltage" (about 270V) for the receiver part. I cant make-up what's on that copperplate, but it should mention a mA-value for all the voltages produced. Seems to me that this little dynamotor doesn't come from a very powerfull tranceiver. You can easily calculate the watts by multiplying voltage ratio with the given mA-ratio. For really "big" tranceivers the military used big(ger) motor-driven generators in the field. But could you use this for "other" purposes than tranceivers??? Not really ... I'd consider this as some kind of school-display to show how a dynamoter works.
These things are cool af I wonder with a transformer if could be used as a kinda free energy device u know like a 240 to 12v transformer from the output too the input technically it should run constantly obs would have to have a switched 12v battery to get her goin then turn off once spooling also I wonder if u had a rheostat of soem sort on the input of u could control the voltage ie slow motor down a bit to get closer to 240
@@NorfolkMancave ye man should be able too u would need a fair amount of solar power think should imagine be interested to see what amp currrent it draws while running could work out easily how much watts u would need the. For battery and solar
Hahahahahahahahahaha. Never heard of efficiency or energy losses huh fella? There is no free energy. All you can do is move energy and as soon as you do so, you lose some. Nothing is 100% efficient, nothing.
Have i got some sort of deja vu? As you did a video of this working last year and sprayed oil on the paint to see the writing clearly.
Yeah I bive I did video me fitting it to that board now you mention it. I totally forgot about that.
@@NorfolkMancave 😅 i though it was odd aha i remember a lot of your videos😎
Having worked in electrical engineering for the most of my fifty year working life, I used multi-meters nearly every day.
I can say that you are the only person that I have ever heard call the resistance range the 'horse shoe' range.
Hahahaha.
Lol.. yeah I could be posh and ohms. But Horse shoe sounds better. 🤣🤣
Adam excellent video. Your videos are better than anything the BBC can produce. Always entertaining. Many thanks 😀
Well thanks very much. I try and keep them interesting Sir. Thanks for watching.
Ive heard of these but never seen one. Looks very dangerous but good fun.
just the job if you have a power cuut nice one adam
Yeah it's interesting mate.
Hi
I believe these dynamotors or rotary transformers were used in aircraft radio equipment before transistor inverters became available
You would be correct :)
And I had on old 19 set (tank radio transceiver) which had a small one built in.
Aw thanks for the info.
They radio dynamotors, or rotary transformers for old tube radios some are for the transmitter portion, and smaller one for the receiver. They step up the voltage for the tubes, or valves on airplanes, or boats. I have one that’s a bit of an odd ball it’s military, haven’t been able to find much on it, but just based of its size at out put for watts when you do ohms law it’s probably for the receiver portion to what ever radio it went to. They are fun interesting pieces of history, there essentially an early inverter though also know that there were different versions that were AC, or a kinda of dc output( really it pluses because of the switch commutator, which was herd in the radios.
@4:22 - Commutators.
That's the word I was looking for. 🤣🤣
I just remembered why I subscribed. One is for the crazy contraptions and the other is because you remind me of Phil Harding from Time Team. Without having watched that show for many years, I may not be able to understand you so well. It's a very unique brogue.
Lol. A few folk agree with you I think. Glad you enjoy the vids 😀
When I was a kid I bought one of these at an electronic second hand store, I had a 1/4 hp motor and an old car 1 2v generator along with a tripolet multi meter to do experiments priceless knowledge I'm lucky that I did not kill myself shocked many times that was around 1961 or 2
Yeah I don't want a belt off that blooming thing. 🤣🤣
I owned one when I was a school boy in the late 60th, a classmate found it on his father farm in a tool shed. It was used for a mobile radio transmitter of the german army (Wehrmacht) , it put out 1000V at 150mA from a 12V battery. I used it for electric fishing on a little lake near my place. And yes I was zapped , a very painful experience. Later it found a job for a homebrew CB power amp with valves. The german designation for such dynamotors are "Umformer"
@14:56 - "In new money..." I swear that I just heard this term for the first time on a Time Team episode a few days ago. They compared a measurement using old/new money and I thought that was very interesting. It's equally odd to hear it here in Phil Hardings voice.
Lol. I like the old sayings. 😀
I've got a few smaller ones somewhere, they're from ww11 aircraft valve radios.
Aw great stuff. Few folks have said that.
Those machines are called "Rotary Converters" the part the brushes are in contact with are called "commutators". Way back they would be in all sizes up to hundreds of kilowatts. I have a 1920's book with pictures of them in very large sizes used in DC mains supplies. That rotary converter would have been on a mobile radio transmitter with the 240 volts on the intermediate valves and the 500 volts on the power output, the voltage would be correct only at the rated load so the bulb you have is not a big enough load to pull the voltage down to 250 volts. I would buy it from you, say £20..
Aw very helpfull mate. Thanks. Not sure I want to let it go now 🤣🤣
Good Evening Adam, Another great video you made a good job. Take care of yourself and stay safe.🛠️🛠️⭐️👍
Thanks, you too! Have a great Christmas. 😀
That is designed to provide power for a radio.
Those generally date to WW2 and the most common ones are from aircraft radios, but they generally operate on 28 volts. That one being 12 volts is more likely a land vehicles radio supply.
Aw I didn't know that. Thanks
Very nice bud can run tools mains stuff off it bud
Yeah she is Dc only. So not sure what I can run on it to be honest.
@10:50 - "Horseshoe mode" I worked with a chap who was actually my boss. He always said "Horseshoe Mode" and "u-mode" for microamps and such. He wasn't trying to be funny though, he was just a bell-end.
Lol. Glad I'm not the only one. 🙂
The chap that Started Leland worked for Dayton to start with. The chaps that make motors for bench grinders and such.
Interesting indeed. Thanks
Good video cheers
Thanks 👍
That’s a smart bit of kit. I wouldn’t mind it Adam. Can you store it until next year? I’ll be down to see family in Disd in the spring.
Yeah it's not going anywhere any time soon mate. Glad you like it. 👍
Adam, that rotary convertor or transformer would have been used in a WW2 military vehicle for powering a receiver/transmitter, those voltages are I believe for a 19 set. DO NOT TOUCH THEM AS THEY COULD WELL MAKE YOU DEAD!
Yeah. The bloody thing scares me. 🤣🤣. To many exposed terminals to accidently touch. I bet the 550v would wake you up, or put you to sleep 🤣🤣
get some kind of generator to run from a hit and miss engine to charge the battery that would be cool to display
Yeah dis think of using the Norman battery charger. Like you say. 😀
Adam that is amazing
Thanks buddy 😀
You generator possibly more then one bulb
Well that's different
Yeah a bit different I must say.
Only to use with (military) radio-gear (using valves)
Totally not fitted for regular bulbs as the current (miliamps) delivered at the High voltage side is WAY too low.
Just good enough for LED (to test)
It will probably deliver DC ... not AC.
They are called "dynamotors" and were commonly used during WW2
Yeah its DC only. What sort of draw would I need on that to make it work??
@@NorfolkMancave I don't understand what you mean with "draw" ...
Probably "current-draw".
Those dynamotors normally produce 2 high voltages ... one (quite high) for the transmitter-tube ... mostly about 500VDC.
And a lower "high-voltage" (about 270V) for the receiver part.
I cant make-up what's on that copperplate, but it should mention a mA-value for all the voltages produced.
Seems to me that this little dynamotor doesn't come from a very powerfull tranceiver.
You can easily calculate the watts by multiplying voltage ratio with the given mA-ratio.
For really "big" tranceivers the military used big(ger) motor-driven generators in the field.
But could you use this for "other" purposes than tranceivers??? Not really ...
I'd consider this as some kind of school-display to show how a dynamoter works.
These things are cool af I wonder with a transformer if could be used as a kinda free energy device u know like a 240 to 12v transformer from the output too the input technically it should run constantly obs would have to have a switched 12v battery to get her goin then turn off once spooling also I wonder if u had a rheostat of soem sort on the input of u could control the voltage ie slow motor down a bit to get closer to 240
Lol, that doesn't work, but feel free to wander around fantasy island
Yeah I did wonder if you could run it off a battery that was charging by solar or wind.
@@NorfolkMancave ye man should be able too u would need a fair amount of solar power think should imagine be interested to see what amp currrent it draws while running could work out easily how much watts u would need the. For battery and solar
Hahahahahahahahahaha.
Never heard of efficiency or energy losses huh fella?
There is no free energy.
All you can do is move energy and as soon as you do so, you lose some.
Nothing is 100% efficient, nothing.
Is not a good idea to spray WD40 to the commutators. they shoud be free of grease and moisture.
Working with electricity is fine, just keep one hand in your pocket! 🤣
Can it charge electric cars? 🤣
There's nuthen wrong with a dirty contact !
Lol.. somone had to say it. 🤣🤣🤣
Thats too scary for me
Yep. Scary for me to. Bloody thing. 🤣🤣