MRI Machine(with super-conductive magnets)

[Hakron]

Hi All,

Currently i work at a hospital that are decommissioning an MRI machine with  super-conductive magnets.

Would the hack-space be interested in an old MRI machine, be warned it is fairly large....

Best Regards

Hakron

[Dave Ingram]

Hi Hakron,

> Currently i work at a hospital that are decommissioning an MRI machine
> with super-conductive magnets.
>
> Would the hack-space be interested in an old MRI machine, be warned it
> is fairly large....

My only thought is: where would we get the liquid helium, and how much
would it cost?


D

[Russ Garrett]

We definitely don't want all of it - it would be ludicrously
impractical on a number of levels.

The magnets are just copper, but it's probably hundred to thousands of
pounds of it in salvage value. I don't know what the sensors are like
in those machines, there might be something interesting in there.

I am tempted to defer to Mike Harrison on this one :)

--
Russ Garrett
ru...@garrett.co.uk

[Adrian Godwin]

The power supply could be very interesting. Probably about 10V at a few hundred amps.

[Simon Howes]

Can we not just put it between the 3 in 1 and the screwdrivers/chisels?

[Adrian Godwin]

Magnet coils will be copper if it's resistive. If it's superconducting they'll be niobium-tin and probably have a ludicrous scrap value.

[Dirk-Willem van Gulik]

On 30 nov. 2012, at 12:38, Hakron <hack...@spox.co.uk> wrote:

> Currently i work at a hospital that are decommissioning an MRI machine with super-conductive magnets.

You may find that there is very very VERY serious scrap value in that beast.

Dw.

[Mike Harrison]

I'd be super-interested in doing an on-site teardown video - where is it..?

[Aaron Oliver-Taylor]

Hi All,

I am a MRI physicist at UCL, so I can advise on what would actually be useful, and practical for the hackspace to have, if you want to take some of the kit.  The magnet itself will be very impractical, and usually they are refurbished by the manufacturer and resold to other countries that don't need something state of the art.  It's also rather impractical to scrap, firstly you would have to get something weighing 10 tonnes to the hackspace, then get through the steel outer and cryostat.

What would be useful would be some of the RF system (particularly amplifiers and frequency sources), the gradient amplifiers (very high power DC to 100kHz amplifiers), and perhaps some other bits.

Hakron, could you tell me what make, and model the scanner is?

Cheers,

Aaron

__________________________________________
Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

[Billy]

The 10 ton weight estimate will be dependent on the model of the
machine.

I get regular MRI scans so i've seen the development of these machines
over the last 10 years.

They've got smaller and less weighty, as well as more precisely
engineered.

The older machines are large and heavy.

We won't have the space for the full machine, but the components will
be useful.

If the hospital doesn't want to get the scrap value, then we could use
part of the scrap value for the deposit for 445...


On Nov 30, 11:51 am, Aaron Oliver-Taylor

<aaron.oliver.tay...@gmail.com> wrote:
> Hi All,
>
> I am a MRI physicist at UCL, so I can advise on what would actually be
> useful, and practical for the hackspace to have, if you want to take some
> of the kit.  The magnet itself will be very impractical, and usually they
> are refurbished by the manufacturer and resold to other countries that
> don't need something state of the art.  It's also rather impractical to
> scrap, firstly you would have to get something weighing 10 tonnes to the
> hackspace, then get through the steel outer and cryostat.
>
> What would be useful would be some of the RF system (particularly
> amplifiers and frequency sources), the gradient amplifiers (very high power
> DC to 100kHz amplifiers), and perhaps some other bits.
>
> Hakron, could you tell me what make, and model the scanner is?
>
> Cheers,
> Aaron

> *__________________________________________*
> Aaron Oliver-Taylor
> *Email* aaron.oliver.tay...@gmail.com
> *Web*   aayotee.wordpress.com

[Peter "Sci" Turpin]

I'd say while it's an amazing opportunity, it's the sort of thing we
could only seriously consider if we end up with a new space the size of
445. And even then it'd likely end up sitting in the car park being
picked to bits. We wouldn't be able to let it near any other equipment,
even if we just had the magnets out of it.

Superconductors IIRC are generally exceptionally brittle ceramics. We
couldn't exactly resize one of the toroids. They'd take a LOT of
cryogenic material to bring down to an operating temperature.
That said if anyone wants to build a cyclotron for the space, that's a
possible.

Do you actually have any say on how the machine is to be disposed of,
and is there any timescale? I would expect a hospital to want some
serious scrap value for it.

I've worked with large ion pumps before and I'm aware of the dangers of
powerful permanent magnets can have. Something of MRI strength will pose
extreme dangers to people and machinery within a good distance of it.
This will severely limit how and when it can be used, where it could be
placed and who would have access to it (or be within a dozen meters of
it while running).

[IrradiatedHaggis]

Would it actually have permanent magnets? I'm guessing they would be superconducting electromagnets... Which, while awsome for a cyclotron, are just impossible for a small scale amateur experiment to operate... I.e. Cryogenic requirements, etc. Many amatuer cyclotrons have been built with the big Nd magnets that are available... If the machine does have some permanent magnets of that variety then they would be a great salvage.

Cheers,

Troy. 




Sent from Samsung tablet

[Aaron Oliver-Taylor]

A typical clinical MRI scanner has the following

A large superconducting magnet.  Given that Hakron said it was superconducting, that's what it is.  It will use Niobium Titanium, because Niobium Tin is not necessary for clinical strength MRI scanners. Niobium Titanium typically comes as fibres contained within a copper wire, so you might be able to *unwind* it.  It requires liquid helium to be superconductive.  Liquid Helium is not cheap, in fact at UCL earlier this year we struggled to get it for a few months (MEG scanning stopped completely for several months).

You also need to surround an MRI scanner by a faraday cage (i.e. the scan room is shielded), and magnetically shield the room with about 200 tonnes of iron or steel to prevent the fringe field from reaching too far.

As far as the weight goes, well they haven't really got that much smaller for your typical clinical machine.  If you mean an open MRI scanner which uses a permanent magnet then perhaps, but if anything they are making stronger permanent magnet systems, which are even more open (something something fat people), and hence larger.  My guess is this machine that they are decommissioning is a 1.5T system, probably about 10-15 years old, probably not actively shielded and so quite large.

Shim coils.  These may be resistive or superconducting, and obviously have shim power supplied as well to provide the DC currents.

Gradient coils - these provide pulsed magnetic fields, which are switched at audio frequencies.  They are very large, and very linear, so could be useful, especially if you can get the gradient amplifiers too.

RF Coils - not fantastically useful, unless you have another MRI scanner to put them into.

RF Transmitter - this will be a large (around 10kW peak power) pulsed power RF amplifier.  1.5T operates at about 64MHz, and it will do lower frequencies.  You could use this, combined with a large loop of wire to make your own RF inductive power system (like wi-tricity).

RF Synthesiser: It might have a PTS frequency synthesiser for a really stable frequency source up to a 100's of MHz.

Patient bed - it's an electronically controlled bed, capable of being precisely moved.  Usually they are accurate to 1mm...

The rest of it probably has some use as parts.

I've actually scavenged lots of bits from MRI scanners as they have shut down/decommisioned/replaced them here at UCL.

Aaron

________________________

Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

[Peter "Sci" Turpin]

What I take from this is there's the possibility of unwinding the coil
to make smaller more manageable superconductor setups, but cooling it to
functioning temperature will be nearly impossible? (making our own is
out of the question for practicality)

Also that we could jam every radio signal in London if we hooked the
transmitter up to an aerial.

I also gather I need to start hanging around the bins at UCL.

> *Email* aaron.oli...@gmail.com <mailto:aaron.oli...@gmail.com>
> *Web* aayotee.wordpress.com <http://aayotee.wordpress.com>

>
>
> On Fri, Nov 30, 2012 at 5:09 PM, IrradiatedHaggis <hs_...@codemaven.me
> <mailto:hs_...@codemaven.me>> wrote:
>
> Would it actually have permanent magnets? I'm guessing they would be
> superconducting electromagnets... Which, while awsome for a
> cyclotron, are just impossible for a small scale amateur experiment
> to operate... I.e. Cryogenic requirements, etc. Many amatuer
> cyclotrons have been built with the big Nd magnets that are
> available... If the machine does have some permanent magnets of that
> variety then they would be a great salvage.
>
> Cheers,
> Troy.
>
>
>
>
> Sent from Samsung tablet
>
>
>
> "Peter "Sci" Turpin" <s...@sci-fi-fox.com

[Hakron]

Okay overall it sounds like there is likely to be some interesting components in it........

I will see what can be done about getting access to it on site, before the contractors get at to remove the rest of the equipment.

The building it is currently housed in is being handed over to contractors shortly to refurbish it. In the process they will be removing 2 large walls to get it out of the building. If it is possible to get access to it shortly before the  contractors get started as it will likely to be damaged during this process.

As a recall it's a GE MRI liquid helium cooled scanner, based in a hospital in west london.

In all likelihood if we are permitted to take it to pieces on site, how many people and what sort of work will be required to remove any parts that would be of interest? 

[Adrian Godwin]

Is there any chance you could get in to take photos before the contractors arrive ?

[Richard Elliott]

Certainly that shouldn't be a problem....

--

Best Regards

Richard Elliott

[Mike Harrison]

I'd imagine anything of serious interest would basically be electronics, and unlikely to be too big
to dismantle into easily-movable loads - e.g. 19" rack units .
Due to this, it would be worth investigating whether the electronics will actually still be there,
in case they have already been removed.

There may also be some non-useful but cool 'objects' as well, like insanely big connectors, helium
plumbing, cool warning signs etc.

As I said I'd really love to do a video teardown to 'up the game' in my series of video teardowns
of increasingly large things ( must get that damn baggage x-ray machine out of my garage so I can
get the car back in...) :
http://www.youtube.com/playlist?list=PL0KZLmPyL6AnVxyvFZRKGsIfcpQlHx0xH&feature=plcp

& would be happy to help with dismantling.recovery of useful stuff.

I suspect that as soon as a contractor is involved they won't want to allow access for H&S reasons,
so any access would need to be before that.

[cepm...@yahoo.co.uk]

Can we make sure that anything that ends up back at the space is either

Immediately useful
or
Is small enough not to cause inconvenience to other users
or
Is removed rapidly to another storage facility.

The history of large projects in the space has been littered with woe and
misery with much squeaking and whining about objects even as small as a
car gearbox. Please do not be the source of further distress to our
community....


Phil
--
" et cognoscetis veritatem et veritas liberabit vos. "

>> Okay overall it sounds like there is likely to be some interesting
>> components in it........

>

> I'd imagine anything of serious interest would basically be electronics,
> and unlikely to be too big to dismantle into easily-movable loads -
> e.g. 19" rack units .

[Richard Elliott]

Photos as requested...

On 1 December 2012 23:17, Adrian Godwin <artg...@gmail.com> wrote:

[Hakron]

Hi Mike,

Regarding the 19" rack units, i have already claimed these.....

There maybe a spare sprectrum analyzer or 2 if that is of interest?

Hakron

[Hakron]

Hi Phil,

I appreciate you comment, but this is only suggested as it may have been of interest to hackspace.

If not, this isn't a problem as the disposal is already planned.....

Hakron

[Mike Harrison]

On Mon, 3 Dec 2012 15:41:46 +0000, you wrote:

>Photos as requested...

Any sign of electronics racks? If not, there's probably little of interest, except maybe
motors/slide etc.

[Aaron Oliver-Taylor]

Nice pics! wow it's a Picker, that is old!  Which Hospital is this?  By the looks of things it's not been at field for some time?  So the apollo is a 0.5T system, which means the RF stuff operates at about 22MHz.  The RF amplifier will probably be very well suited to a wireless energy transfer system...

__________________________________________

Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

[Jasper Wallace]

Hakron <hack...@spox.co.uk> wrote:

>Hi Mike,
>
>Regarding the 19" rack units, i have already claimed these.....
>
>There maybe a spare sprectrum analyzer or 2 if that is of interest?

What frequency range do they support?

Do you know the make and model?

I don't think we've got a spectrum analyzer in the space.


--

[Alexander Wright]

On Mon, 2012-12-03 at 15:43 +0000, Hakron wrote:
> Hi Mike,
>
>
>
> Regarding the 19" rack units, i have already claimed these.....
>
>
> There maybe a spare sprectrum analyzer or 2 if that is of interest?
>
>
> Hakron

Yes please!

[Hakron]

Regarding the MRI's age, and last use going by the one tag i could find it was manufactured in 1998. It was probably last used approximately 5 years ago, and is currently located at hammersmith hospital.

I'll get model numbers of the HP spectrum analyzers tomorrow. The ones available will certainly go upto 20mhz as i recall, but they could well be higher.

AARON: While there is a 2.5KW RF amplifier, it will probably not be available, but i'm interested to hear about the possible use of it in an energy transfer system.......

MIKE: We could certainly do a teardown video for interest, but if we are not taking any components we'd probably have to do very shortly before it's final removal!

Would the high voltage electrics be suited for building a teslacoil?

[Mike Harrison]

I don't think there is any HV in these things, just high currents!

[Aaron Oliver-Taylor]

The gradient amplifiers will be very high current.  In the early days of MRI these were in fact audio amplifiers - I once scavenged a crown M600 amplifier from a system.

Are they HP spectrum or network analysers?  If they are the latter then they are extremely useful for building antenna's, transmission lines, RF circuits etc.  Network analysers tend to be attached to MRI scanners (we have 2 in my lab) for building and tuning the RF coils for transmission and reception.

As for wireless energy transfer - it's basically Witricity http://www.witricity.com/.  You have two resonant coils  placed some distance apart, but so that they are within their near field regime.  They couple strongly to one-another, allowing the efficient transfer of energy between them.  The transmitter coil will be fed by the RF amplifier, and the receiver coil will need to rectify and smooth the coupled RF.  I read the witricity papers a couple of years ago, I think they operate at about 10MHz.

The 2.5kW amplifier will be able to produce 2.5kW peak power, but its CW power will be more like 200W.  So you won't be able to power a lot of things, but it would be a pretty neat thing to show off.

__________________________________________

Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

[tom]

Are they in any way useful for a tesla coil or similar?

On Tuesday, December 4, 2012 10:53:08 AM UTC, aot wrote:

The gradient amplifiers will be very high current.  In the early days of MRI these were in fact audio amplifiers - I once scavenged a crown M600 amplifier from a system.

Are they HP spectrum or network analysers?  If they are the latter then they are extremely useful for building antenna's, transmission lines, RF circuits etc.  Network analysers tend to be attached to MRI scanners (we have 2 in my lab) for building and tuning the RF coils for transmission and reception.

As for wireless energy transfer - it's basically Witricity http://www.witricity.com/.  You have two resonant coils  placed some distance apart, but so that they are within their near field regime.  They couple strongly to one-another, allowing the efficient transfer of energy between them.  The transmitter coil will be fed by the RF amplifier, and the receiver coil will need to rectify and smooth the coupled RF.  I read the witricity papers a couple of years ago, I think they operate at about 10MHz.

The 2.5kW amplifier will be able to produce 2.5kW peak power, but its CW power will be more like 200W.  So you won't be able to power a lot of things, but it would be a pretty neat thing to show off.

__________________________________________
Aaron Oliver-Taylor
Email aaron.oliver.taylor@gmail.com
Web   aayotee.wordpress.com

[Aaron Oliver-Taylor]

Perhaps the RF amplifier, but it's sort of overkill...

__________________________________________
Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

[James Harrison]

In other words, /perfect/ for a tesla coil...

(Spectrum/network analysers in general are very much worth getting mitts on, given their cost new - even relatively low frequency ones aren't in any way cheap and can be hugely useful for RF work!)

On 04/12/12 12:48, Aaron Oliver-Taylor wrote:

Perhaps the RF amplifier, but it's sort of overkill...
__________________________________________
Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

On Tue, Dec 4, 2012 at 12:37 PM, tom <bollo...@gmail.com> wrote:

Are they in any way useful for a tesla coil or similar?

On Tuesday, December 4, 2012 10:53:08 AM UTC, aot wrote:

The gradient amplifiers will be very high current.  In the early days of MRI these were in fact audio amplifiers - I once scavenged a crown M600 amplifier from a system.

Are they HP spectrum or network analysers?  If they are the latter then they are extremely useful for building antenna's, transmission lines, RF circuits etc.  Network analysers tend to be attached to MRI scanners (we have 2 in my lab) for building and tuning the RF coils for transmission and reception.

As for wireless energy transfer - it's basically Witricity http://www.witricity.com/.  You have two resonant coils  placed some distance apart, but so that they are within their near field regime.  They couple strongly to one-another, allowing the efficient transfer of energy between them.  The transmitter coil will be fed by the RF amplifier, and the receiver coil will need to rectify and smooth the coupled RF.  I read the witricity papers a couple of years ago, I think they operate at about 10MHz.

The 2.5kW amplifier will be able to produce 2.5kW peak power, but its CW power will be more like 200W.  So you won't be able to power a lot of things, but it would be a pretty neat thing to show off.

__________________________________________
Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

[Mike Harrison]

On Tue, 4 Dec 2012 04:37:38 -0800 (PST), you wrote:

>Are they in any way useful for a tesla coil or similar?

An amp that can do 2.5kw at a few hundred kHs to low MHz could be awesome for a CW coil, but it had
better have very good output protection to survive

Also, an RF amp that puts out 2.5kw is quite likely to need a 3-phase supply, or at least rather
more than you can pull from a 13A socket.

[Aaron Oliver-Taylor]

Remember this is peak power, not CW, so that's not really the case.  The duty cycle for that is typically about 10%, hence why CW power will be about 250W.  I have an 8kW RF amplifier kicking around somewhere here that doesn't need 3 phase power.  Actual power consumption will be perhaps 500-1000W.  2.5kW is roughly what a kettle uses!

here's an example MRI low frequency, 2kW amplifier http://cpcamps.com/sheets/0.7T2000M.pdf

__________________________________________
Aaron Oliver-Taylor
Email aaron.oli...@gmail.com
Web   aayotee.wordpress.com

[Peter "Sci" Turpin]

Wow, physically a lot smaller than I'd imagined!

On 03/12/2012 15:41, Richard Elliott wrote:
> Photos as requested...
>
> On 1 December 2012 23:17, Adrian Godwin <artg...@gmail.com

[Peter "Sci" Turpin]

I should also note the helium manifold there is using some nice
high-vacuum compatible fittings. Definitely worth taking those bits at
least for future high-vac projects.
Probably an inconvenient shape, but likely means the helium pressure
jacket could be used as a vacuum chamber too.

On 03/12/2012 15:41, Richard Elliott wrote:

> Photos as requested...
>
> On 1 December 2012 23:17, Adrian Godwin <artg...@gmail.com

[IrradiatedHaggis]

We should definitely jump at the chance to salvage any ConFlat of Kwik-Flange (KF/QF) flanges if there are any. ASA flanges are far less useful, but may also be handy if there are any... Does the MRI machine have a vacuum system? If there are any pumps (especially a small diffusion or turbomolecular pump) we should see about grabbing them.

In regards to other comments here, I doubt the HF kit would be of any use for a tesla coil. It's possible to build a CW SSTC with an HF amplifier, but just not worth the effort usually... If the thing was really old and had some 811A Vacuum valves in it then they would be a nice find, but I don't think you'll find them in an MRI machine built in the 90s.

Cheers,

Troy.




Sent from Samsung tablet

[Mike Harrison]

I recently picked up a couple of job lots of random lab equipment for peanuts. Before I put it on
ebay, if there is any serious interest in any of the following I'd be happy to donate it to the HS
or other good causes who could make use of it.
I'm in the process of testing it all & doing some brief (nondestructive) teardown vids, it should
be available next week-ish. Everything I've looked at so far is working or easily fixable.

Collection from IG10 or E18 area

Two electrophoresis PSUs :

LKB Bromma Microdrive 2301 1000V/200mA or 500V/400mA

Pharmacia EPS600 - 600V
http://www.sci-support.com/items/Pharmacia-Amersham-EPS600-EPS-600-Electrophoresis-Power-Supply-1327.htm

ECM ElectroSquare Porator ECM830 - this is basically a pulse generator that can output from 5v to
3kv programmable length pulses from 10uS to 1 second
http://www.harvardapparatus.com/webapp/wcs/stores/servlet/haisku2_10001_11051_35779_-1_HAI_ProductDetail_N_37457_37460

Needless to say the above are potentially dangerous in the wrong hands!

Mettler toledo seveneasy Ph meter (no probe or stand). Appears accurate when testest on millivolt
range.
http://in.mt.com/in/en/home/products/Laboratory_Analytics_Browse/Meter_family_page/SEVEN_Bench_meters_Family_page/S20_SevenEasy_pH_1.html

Hamilton Micro Lab M dispenser with keypad, syringe and dispenser handpiece
http://www.ebay.co.uk/itm/Hamilton-Micro-Lab-M-Diluter-Dispense-Accessories-/230413594430

Three lab balances - not checked these but came from a working environment, at least 1mg resolution

Oertling R40
http://thumbs4.ebaystatic.com/d/l225/m/mnBLQjym9ydFy8Iq_qtNnUw.jpg
Mettler P165
http://thumbs1.picclick.com/pict/1709048809564040_/Mettler-P165-Lab-weighing-scales.jpg

Sartorius digital (0.01mg resolution)
http://www.ashfieldtechnology.com/balance.htm

A small centrifuge
http://www.hermle-labortechnik.de/english/products/mikroliterzentrifugen/products_z233m2.html
This may have a catastrophic fault in the motor inverter as the fuse is blackened -not had a chance
to look at this one in detail yet.

An ultrasonic cleaner bath approx 10x6x4", no heater or timer.

Two Techni Dri-block adjustable hotplates, one analogue, one digital - 140x80mm recessed plate, temp
range up to 100 deg.C, so no good for reflow!

I also have 4 gas analysers which I'll be stripping for parts , which may yeield some pumps &
plumbing, flow indicators etc. there are a couple of medium-sized vacuum pumps in two of them.

Cal 9000 temperature controller new in box with docs.
http://www.ebay.com/itm/CAL-9000-TEMPERATURE-CONTROLLER-912-119-/150565465567
Would be ideal for kiln etc. Can use thermocouple or pt100 sensor

[Jim Allanson]

A lot of those items seem like they would be very useful for Biohackers - in fact, we just bought a very similar centrifuge to yours a few weeks back (although this one looks a bit newer than ours).

The electrophoresis power supply would certainly be very useful for us as we're currently using a hacked together one for electrophoresis, but yours seems to be much more capable. We've also been discussing buying a pH meter recently, so that would be another very useful addition.

I'm not too sure about some of the other items, the Micro Lab looks useful, but I'll let other Biohackers with more experience with proper lab equipment weigh in on that one.

[Mike Harrison]

OK - seems like there is interest.
I want to have a look at the centrifuge myself as I like fixing things...
Probably the best thing is to arrange amongst yourselves a time to come over some time with a car
(IG10 2NS), some time from mid next week onwards & contact me off-list.
Best times for me are generally mornings before noon or evenings after 9PM, weekday or weekend.

[Will Beaufoy]

Wow Mike! This stuff looks great!

- Ph meter is something we've been discussing getting as Jim says. It would enable us to to make up our own buffer solutions.

- A second centrifuge would also be very useful

- Scales would be excellent - our current one isn't that precise

- Ditto hotplates. Atm we're just using a kitchen one with no scale

- In fact everything looks great!

Apparently our Mike has already been in touch with you, so we'll set about arranging a time.

Thanks again,

Will

[Ian Henderson]

I'd like to have the Ultrasonic cleaner as the one I have at the moment has burn't out

Happy to make a modest payment or donation

Ian Henderson (Thumper)

[Nick Johnson]

Do either of these have magnetic stirrers?

[Nicholas FitzRoy-Dale]

I have no experience with proper lab equipment, but I'd echo Jim's
comment about the electrophoresis PSU, the pH meter, and the
0.01mg-resolution scale, and maybe other things, being very useful for,
and much appreciated by, the biohackers!

Nicholas

On 07/12/12 11:05, Jim Allanson wrote:
> A lot of those items seem like they would be very useful for Biohackers
> - in fact, we just bought a very similar centrifuge to yours a few weeks
> back (although this one looks a bit newer than ours).
>
> The electrophoresis power supply would certainly be very useful for us
> as we're currently using a hacked together one for electrophoresis, but
> yours seems to be much more capable. We've also been discussing buying a
> pH meter recently, so that would be another very useful addition.
>
> I'm not too sure about some of the other items, the Micro Lab looks
> useful, but I'll let other Biohackers with more experience with proper
> lab equipment weigh in on that one.
>
>
> On 7 December 2012 10:56, Mike Harrison <mi...@whitewing.co.uk

[Mike Harrison]

>> Two Techni Dri-block adjustable hotplates, one analogue, one digital -
>> 140x80mm recessed plate, temp
>> range up to 100 deg.C, so no good for reflow!
>>
>
>Do either of these have magnetic stirrers?

No

[Mike Harrison]

Lab Eq is now spoken for by biohackers and a couple of others so no more enquiries please- I've
emailed the people who expressed interest.

Happy biohacking!

[Peter "Sci" Turpin]

Any word on if/when we'd be picking at the ancillaries?

On 30/11/2012 11:38, Hakron wrote:
> Hi All,
>
> Currently i work at a hospital that are decommissioning an MRI machine
> with super-conductive magnets.
>
> Would the hack-space be interested in an old MRI machine, be warned it
> is fairly large....
>
> Best Regards
>
> Hakron
>
>

[Hakron]

Hi All,

Just having returned from abroad after the christmas and new year break. Unfortunately i have finished my previous contract at the hospital where the MRI machine was located. I'm not sure of the status of the project, but i would suggest we consider this already scrapped.

I've collected the 19" rack units, and they are in my office at london bridge. PICs attached of the units, if they are wanted by the hackspace someone will need to collect them from tooley street in the next week or so. FYI there are the pneumatic cable tune lines with the pneu-pac......

Please let me know if these items are of no interest to the hackspace, and i will try and find them a new home.

Hakron

[James Harrison]

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Not sure how generally usable much of this kit is but might be of
interest to RF bods tinkering around in the lower frequency bands.
Might be worth having at the space, though - if they can be hung onto
long enough for space to be less of an issue, at any rate!

I'd be interested in the HP boxes, particularly the spectrum analyzer,
if the consensus is the space isn't interested. Drop me a line
off-list if so.

Cheers,
James Harrison

On 04/02/2013 19:04, Hakron wrote:
> Hi All,
>
> Just having returned from abroad after the christmas and new year
> break. Unfortunately i have finished my previous contract at the
> hospital where the MRI machine was located. I'm not sure of the
> status of the project, but i would suggest we consider this
> already scrapped.
>
> I've collected the 19" rack units, and they are in my office at
> london bridge. PICs attached of the units, if they are wanted by
> the hackspace someone will need to collect them from tooley street
> in the next week or so. FYI there are the pneumatic cable tune
> lines with the pneu-pac......
>
> Please let me know if these items are of no interest to the
> hackspace, and i will try and find them a new home.
>
> Hakron
>
>
> On 8 December 2012 13:58, Peter "Sci" Turpin <s...@sci-fi-fox.com

> <mailto:s...@sci-fi-fox.com>> wrote:
>
> Any word on if/when we'd be picking at the ancillaries?
>
>
> On 30/11/2012 11:38, Hakron wrote:
>
> Hi All,
>
> Currently i work at a hospital that are decommissioning an MRI
> machine with super-conductive magnets.
>
> Would the hack-space be interested in an old MRI machine, be
> warned it is fairly large....
>
> Best Regards
>
> Hakron
>
>
>

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[tom]

if any of it is dead and irrepairable can i have the knobs and buttons off them?

[Ian Henderson]

The HP boxes have a high 2nd hand value. I sold one recently for £850

[Adrian Godwin]

The HP boxes have the highest value, but the Marconi is useful. I once
owned a similar model - it's a bit odd to use but works perfectly
well.

On Mon, Feb 4, 2013 at 10:57 PM, Ian Henderson
<i...@advancedforensics.com> wrote:
> The HP boxes have a high 2nd hand value. I sold one recently for £850
>

[Adrian Godwin]

The 3335a generator is a precision signal generator. 200Hz to 80 MHz,
so useful for low RF stuff and some audio.

The 3582a is a very nice dual channel spectrum analyzer that goes up
to 25kHz. Audio again.

The Marconi spectrum analyser is OK to 2000MHz. This might appear to
be useful for 2m but you really need at least 3 times the frequency of
interest for transmitter work, so it's of limited use beyond the 4m
band. Matches the signal generator quite well for lower frequencies
though.

Please don't ebay them.

[Peter "Sci" Turpin]

I'm glad someone's checking value before tearing it apart.

[Paddy Duncan]

Hi Hakron,

Are these things still there, I can collect on behalf of the Space real soon if so..

Cheers

Paddy

--

[Martin Dittus]

I've long lost track of the full discussion so I'm not entirely sure whether we are indeed interested.

In case we are:

Informed by past experience I suggest that whoever decides that we want these be treated as maintainer; to issue the devices with a DNH sticker with maintainer names, and maybe even with a probation period of a few months.

(This essentially means: the cost of accepting such contributions is that you're now responsible for them. I think that's a balanced way of managing donations.)


m.

[Adrian Godwin]

Good idea.

I'll happily take care of the hp3335, hp3582 and marconi analyser.
It's possible we'll end up getting rid of the Marconi as it's quite
large, but that needs to be discussed with the radio enthusiasts.

-adrian

[fuzail usmani]

i have 11 ton permanent magnet of Siemens 0.2 tesla MRI machine and i wants to sell it in scrap anyone please give some idea and tell me that what would be permanent magnet amount in it. 

On Friday, 30 November 2012 22:39:35 UTC+5:30, IrradiatedHaggis wrote:

Would it actually have permanent magnets? I'm guessing they would be superconducting electromagnets... Which, while awsome for a cyclotron, are just impossible for a small scale amateur experiment to operate... I.e. Cryogenic requirements, etc. Many amatuer cyclotrons have been built with the big Nd magnets that are available... If the machine does have some permanent magnets of that variety then they would be a great salvage.

Cheers,

Troy. 




Sent from Samsung tablet

"Peter "Sci" Turpin" <s...@sci-fi-fox.com> wrote:

I'd say while it's an amazing opportunity, it's the sort of thing we
could only seriously consider if we end up with a new space the size of
445. And even then it'd likely end up sitting in the car park being
picked to bits. We wouldn't be able to let it near any other equipment,
even if we just had the magnets out of it.

Superconductors IIRC are generally exceptionally brittle ceramics. We
couldn't exactly resize one of the toroids. They'd take a LOT of
cryogenic material to bring down to an operating temperature.
That said if anyone wants to build a cyclotron for the space, that's a
possible.

Do you actually have any say on how the machine is to be disposed of,
and is there any timescale? I would expect a hospital to want some
serious scrap value for it.

I've worked with large ion pumps before and I'm aware of the dangers of
powerful permanent magnets can have. Something of MRI strength will pose
extreme dangers to people and machinery within a good distance of it.
This will severely limit how and when it can be used, where it could be
placed and who would have access to it (or be within a dozen meters of
it while running).