If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
2 High Voltage rectifier tubes capable of producing X-rays.
Any vacuum tube operating at several thousand volts or more can produce
x-rays as an unwanted byproduct, raising safety issues.[2][3] The higher the
voltage, the more penetrating the resulting radiation and the more the
hazard. Color televisions and computer CRT displays operate at 30-40
kilovolts, making them the main concern among household appliances.
Historically, concern has focused less on the cathode ray tube, since its
thick glass envelope is impregnated with several pounds of lead for
shielding, than on high voltage (HV) rectifier and voltage regulator tubes
inside. In the 1970s it was found that a failure in the HV supply circuit of
some GE TVs could leave excessive voltages on the regulator tube, causing it
to emit X-rays. The models were recalled and the ensuing scandal caused the
US agency responsible for regulating this hazard, the Center for Devices and
Radiological Health of the Food and Drug Administration (FDA), to require
that all TVs include circuits to prevent excessive voltages in the event of
failure. This hazard was eliminated with the advent of all solid state TVs,
which have no tubes beside the CRT. Since 1969 the FDA has limited TV X-ray
emission to 0.5 mR (milliroentgen) per hour.
I see it your first post so hello and thank for making me think im infertial
Is it not the freq of High voltage which give you x-rays? or just high voltage?
@Bodkins,
@Marseye,
thank you for the kind greetings and the recommended link about the RE!
Today I found some small (only 40 mm sized, 12V, 1W and 0.9W, "impedance protected" as their labels shows) old CPU cooler fans, I have tried to "transform" by the usual way; the only pity that there were no posts at all: the wires were soldered to the control panel directly. Even, there are no the usual four-armed (cross-like) iron plate core with four coils - only a single cylindic coil is there (bifilar, I guess, as there are four small wires coming out from it), located axially, and there are two thin iron plates (the core, I guess) one is below and one is above the coil.
Do you have some experience/idea about this kind of fan? Could it be better, or worse than the "usual" fans? (If you find it better, that will have a very bad consequence for me, as the wires are very short and thin. )
@Bodkins,
@Marseye,
thank you for the kind greetings and the recommended link about the RE!
Today I found some small (only 40 mm sized, 12V, 1W and 0.9W, "impedance protected" as their labels shows) old CPU cooler fans, I have tried to "transform" by the usual way; the only pity that there were no posts at all: the wires were soldered to the control panel directly. Even, there are no the usual four-armed (cross-like) iron plate core with four coils - only a single cylindic coil is there (bifilar, I guess, as there are four small wires coming out from it), located axially, and there are two thin iron plates (the core, I guess) one is below and one is above the coil.
Do you have some experience/idea about this kind of fan? Could it be better, or worse than the "usual" fans? (If you find it better, that will have a very bad consequence for me, as the wires are very short and thin. )
is it like this one? if so these are the best coils, just put a bedini on it and it works.
If you can get the maker of the fan please post i have only got two of these fan and would like more, the one in the picture has bifilar with three north and south poles on each end.
Yes, they seem having same structures like yours one.
Unfortunately these my fans are very old ones, I guess, more than 10 years old - so I do not remember, when and which my former computer I "extracted" from. I do not know their real makers, only their labels might serve some information:
--------------
(1) Left fan
- on back label (leftmost on the picture): there is no text (a simple black plastic circle),
- on the front label (middle left):
COOLING FAN
MODEL:
AVC HSF4010
DC12V 0.9W
RL (or RU?, in reverse direction) CSA (or CSR?) TÜV
M.I.T.
-----------------
The right fan,
- on the back label (middle right):
/\dd/\
DC BRUSHLESS
MODEL AD0412MS-G70
DC=12V
0.08A 6108F
ADDA CORP.
ZP RL((or RU?)in reverse direction) TÜV (inside a cirle) C RL((or RU?)in reverse direction) JPP
MADE IN TAIWAN
- on the front label (rightmost):
CPU
COOLER
DC 12 V 1W
IMPEDANCE PROTECTED
RL (or RU?) in reverse direction / CSA (or CSR) / CLE
MADE IN TAIWAN
-----------
The front label of right fan shows, that ADDA Corp. has produced it. Sorry, I do not know more.
Thanks for your advice! As I will have a free evening, I am going to try to remove these coils from their controller panel and to "transmutate" them to a Bedini machine.
Is there a simple (cheap) device to indicate there's X-rays ?
- in hospitals they used photographic materials. I am not quite sure that all the photo films or papers will detect all lengths of x-ray (probably yes) but it would be relatively cheap method to start with. Take piece of photo paper or film for camera put it into special light tight envelope (in a dark room of course, so you don't expose it to any light). I would use relatively thick, black paper for this. Then place it behind the gas tube in such a way that if there are any x-rays emitted they have a chance to hit the envelope. Place a piece of metal on the envelope so it will absorb any possible radiation in this area for comparison. Razor blade for example, or anything (lead aborbs the best). Run it for some time, depends on how intense is the radiation minutes or hours and get the film processed... If any x-rays were present it will look similar to like it was exposed to visible light - and areas under the metal object will be unexposed. I think this method is very simple and reliable. If you ask for a little of used chemicals from photo lab (should be still active in some extend therefore sufficient to start with) and you know how to use it - the method may be even very cheap to implement as well.
@ Henieck : this question about X-rays is interesting and clever. Since I don't yet know how to detect them...
Is there a simple (cheap) device to indicate there's X-rays ?
Kodak produces films specially developed to detect presence of X-ray and gamma-photons and determine the amount of their radiation (dose): "Kodak Personal Monitoring Film Type 2". The Carestream Health Inc. deals with the trade of this filmdosimeters. The other X-ray film products, developed for X-ray imaging, are usually not such sensitive for small doses than this film.
It is quite cheap, 1 pc is cca. 1 USD in Hungary, and can detect a wide range of doses (cca. 0,1 mR...500 R).
The behaviour of the film is heavily nonlinear - in case of small doses the film replies with a very small (although significant) increase of the darkness: so, if you irradiate it with small doses, it is not sure, whether you can visualize the darkness of the exposed film by your eyes.
Usually, a sensitive transmission photodensitometer is needed, which can measure optical density more precisely than 0.02. This device is very expensive, more than 1000 USD.
Instead of an expensive densitometer, you may try to use a flat bed scanner and an imaging software to detect the differences of darkness of the films when your eye cannot do that (e.g scan your films at the same scanning position, copy the two scanned image into a new single empty image, than alter the intensity and the contrast in your software: the difference will appear if it exist).
The other disadvantage of the nonlinearity of the film is that if you produce X-ray with different photon-energy (e.g. you alter either the voltage or material of anode), you might get different amount of the darkness even the intensity was same: the film is most sensitive for the cca. 80..100 keV photon energy. So, when you either increase or decrease the photon energy, the film will be lighter at the same dose (at same photon intensity).
E.g. the darkness is cca. 20-24 times higher in case of 80..100 keV than 1250 keV!
To overcome this problem, usually a special film holder (badge) is used, which contains 2 or 3 different metal filters and 2 or 3 different plastic filters (the principle is same as Henieck mentioned): these filters reduces the intensity of the photon beam, causing spots having different darknesses. As the film and the filters behave non-linearly, the ratio of different darknesses of spots below the different filters characterize the mean photon energy.
Although, you cannot evalute it unless you have got a complete series of films irradiated with the radiation calibration standards... which might cost several thousand of dollars.:-(
But you need NOT buy all of this - even, I guess, you have to buy nothing, except a service.
All the countries of the world have a so-called "Personal Monitoring/Dosimetry Service" providing individual dosimeters for the ionizing radiation workers: in our country it costs only 8 USD for a single case - I am positive, that you can find a similar service near to you, even cheaper.
(If not, call your local authority and ask, "which local laboratory/company is accepted and approved by the authority for personal monitoring of radiation workers exposed to ionizing X-ray?" - and you will get the answer,
what and where it is in your case.)
In my country this service uses Kodak filmdosimeters - some other countries uses so called TL-dosimeters (thermoluminescent solid state dosimeters), but the result is same: if you order this service, they will lend a badge and a film (or a TL-card) for you and when you finish your radiation work, you have to post them back: the service will evaluate your dosimeters and sends back the numeric results to you.
If you select this way, I wish to recommend to order TWO dosimeters:
(1) keep both dosimeter #1 and #2 at that position of your machine where X-ray will be present
(2) but! BEFORE you wish to produce X-ray (you would switch your machine on), remove dosimeter #2 and put to a safe, radiation free location as far distance from your machine as possible.
As you know, there are a natural background radiation everywhere coming from the space, the Earth, the building materials, etc., which is not constant, it might change from location to location.
So, if you do not know, what the background radiation was at the interest position of your machine, you cannot make a difference, so you cannot assure, whether you have failed or succeeded to produce X-ray.
By this method above, you measure your natural background by dosimeter #2, and the operational+background dose by dosimeter #1. Substract the dose of #2 from dose of #1, you get your operational dose: if this number differs from 0, you surely produced X-ray.
Some years ago some guys measured the background radiation doserate in our buiding: it was 90 nSv/h at the 4th floor, 105 nSv/h at the ground floor and 115 nSv/h in front of the building, in open air - so, if I had a machine at the 4th floor, which would elevate the doserate to 115 nSv/h, I would be very happy.
By the way, the cheapest and most productive solution would be the purchase of a cheap electric doserate meter.
I am also interested to buy such an equipment, but at this moment it is not available in Hungary. Some years ago a cheap commercial Chinese electric dosimeter was available, it costed cca. 30 USD, but disappeared.
Rarely the military shops sells some rubbishy electric dosimeters, although none of them can operate... maybe not this is the case in your country!:-)
@ Henieck : this question about X-rays is interesting and clever. Since I don't yet know how to detect them...
Is there a simple (cheap) device to indicate there's X-rays ?
Maybe the cheapest doserate meter is here: A Homemade Fallout Meter . It is called as "fallout meter", because it was intended to measure the radiation coming from the fall-out of radioactive isotopes after the explosion of nuclear wheapons.
It measures the dose rate of gamma-radiation indeed (as it is an "ionizing chamber" detector in principle), so if it works, it can measure any kind of photon radiation, i.e. photon radiation emitted from X-ray tubes, too.
User bolt at OU suggested we study /learn what you fellows are doing here
He posted this vid and said you are on your way to doing what these Russian fellows are doing
If we look at the construction of it, we will notice that it vaguely reminds of a transformer, because here there is pretty no inductive connection, repeated-primary winding, or how we call it, inductor, consists of only 3 turns (coils), but very thick, and here there are about 250-300 turns.
However the circuit works and gives a very powerful discharge, we call it фЕТТОННЫЙ [Phetonniy] (the translation to this word I didn’t manage to find, maybe it’s really their special term).
Also discharges happen all around us , if you look, here it is going. You also can notice that the discharge flows out of the screwdriver towards the coil.
Now we will change the circuit. We will connect one more coil to this coil. See what’s happening.
As a result, the second coil became a charge carrier too.
And we see that it also takes charges out of screwdriver. The lamp isn’t connected to anything. Just a sheet of paper and lamp’s wire is lying on the floor.
However the lamp is burning. It means that the space is excited to the state when the secondary current emission appears in surrounding metallic objects, it means that the object is not connected, but the emission appears.
And this means that there’s a transfer, no, not a transfer of energy, but the information about energy to the surrounding space, it is in excited state here, cause if we touch any object, we see how does the system work (that weird sentence).
This actually is electrostatic energy transfer. The capacity here is only about 15 Watt, but the effect can be observed. With the proper influence upon the surrounding space it provokes appearance of electromotive force like reaction in return.
By analogy if we put any metallic object here or even hold it in the hand, the lamp will burn, because the electrons will be induced, also there’s pretty no isolation from this current, it pumps out pretty from everywhere. So this is Tesla’s transformer (converter).
And if we look at the instrument, we see that it shows the presence of powerful field. The instrument isn’t connected, it reacts. We can observe where the intensity is the biggest, it is here near the receiver.
If we move the instrument away, we see that the intensity is falling down. Here are some more phenomenons that are hard to be estimated like the influence of body, of everything on the registration of the instrument.
It means that everything is so alive around, that it’s hard to imagine. So all the electrostatic transformers and generators originate in here.
And the next continuation of electrostatic machines is so-called “The pipe” plan. Here is similar winding plus one more external pipe is put in. The high-voltage potential is supplied on the pipes and it is taken off from the coils. But as a result of uncontrolled growth, the pipe is punched out (пробивать – I don’t know the exact translation of this word here).
This is more or less powerful version of Tesla’s transformer, that is closer to practical use.
just make imhoptep setup you will learn a lot as you acquire parts and experience try to make simple collector coils. Use a car spark plug to start is much easier then solid state. There is MUCH more harmonic energy in a spark then SS devices. You need HF and HV.
Experiment with ground and small aerial connections to pull in ambient free electrons and it wont take long before you have lit up half a dozen 60 watt bulbs with only 10 watts driven the car ignition coil.
Comment