Drew,

Your 3/4" feedthrough should handle 280 Amps without blinking and a single
00 cable should get you close, but three in parallel should do the trick.
Do you have a current meter available to see what you're actually putting
to the source? Any chance some of that juice is going to ground? Those
insulators are looking pretty shiney.

SiO runs about 50C below Al so you should be able to put a ton of it down
with your system. The trick is spitting (hence the baffle box). Setting up
an RF sputtering system would be more fun than a barrel full of monkeys,
and an excellent winter project (not that you're afflicted by things like
winter) but it seems like there's got to be an easier way. Maybe an array
of smaller baffle boxes (check RD Mathis in addition to Lesker). You can
use tungsten filaments with an alumina crucible and a Ta baffle on top.
Not sure if carbon wool will work or just condense the SiO.

If I were beating my head against that wall, I'd check the current, check
for grounds, and think about getting a smaller box to get a feel for the
source.

Dave

> Dave,
>
> I have a 280 amp resistive heater box ( Leskers ) that I have tried to
> make
> glow several times.? It always ends after a few seconds with the wiring
> getting very hot.
>
> My 5kw welding transformer can put out the amps ( about 1000 amp at 5 vac
> )
> but I cant seem to get it thru the chamber wall without melting power
> transfer cables.? I have a 3/4 inch dia copper rod high amperage pass thru
> ( that came with the chamber ) and have 3 each 3/8" stranded copper wire
> cables running from the pass thru to the little tantalum box. Only one
> cable is shown in the picture but now there are 3 of them.
>
> I just cant make that box glow red before the power cables do.
>
>? ?[image: Inline image 1]
>
> So I am thinking of switching to plasma sputtering like the big boys do.
>
> The big transformer works fine for driving the 36 emitters around the
> chamber ( 4 at a time ) so laying down aluminum is no problem.? It is
> putting down the overcoat that I cant seem to get started on.
>
> [image: Inline image 2]
>
> So do you have any suggestions on how to make the tantalum box glow red or
> where to get a plasma system cost effectively ???
>
> Drew in sunny Florida
>
>
>
> On Thu, Oct 30, 2014 at 4:27 PM, dgrove@... [VacuumX] <
> VacuumX@...> wrote:
>
>> What issues are you having with the SiO that sputtering will fix? That's
>> a
>> pretty big leap from resistive sources to sputtering.
>>
>> Dave
>>
>>
>>
>> ------------------------------------
>>
>> ------------------------------------
>>
>>
>> ------------------------------------
>>
>> Yahoo Groups Links
>>
>>
>>
>>
>




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?

Dave,

I have a 280 amp resistive heater box ( Leskers ) that I have tried to
make
glow several times. It always ends after a few seconds with the wiring
getting very hot.

My 5kw welding transformer can put out the amps ( about 1000 amp at 5 vac
)
but I cant seem to get it thru the chamber wall without melting power
transfer cables. I have a 3/4 inch dia copper rod high amperage pass thru
( that came with the chamber ) and have 3 each 3/8" stranded copper wire
cables running from the pass thru to the little tantalum box. Only one
cable is shown in the picture but now there are 3 of them.

I just cant make that box glow red before the power cables do.

[image: Inline image 1]

So I am thinking of switching to plasma sputtering like the big boys do.

The big transformer works fine for driving the 36 emitters around the
chamber ( 4 at a time ) so laying down aluminum is no problem. It is
putting down the overcoat that I cant seem to get started on.

[image: Inline image 2]

So do you have any suggestions on how to make the tantalum box glow red or
where to get a plasma system cost effectively ???

Drew in sunny Florida



On Thu, Oct 30, 2014 at 4:27 PM, dgrove@... [VacuumX] <
VacuumX@...> wrote:

What issues are you having with the SiO that sputtering will fix? That's
a
pretty big leap from resistive sources to sputtering.

Dave



------------------------------------

------------------------------------


------------------------------------

Yahoo Groups Links

Dave,

I have a 280 amp resistive heater box ( Leskers ) that I have tried to make glow several times.? It always ends after a few seconds with the wiring getting very hot.?

My 5kw welding transformer can put out the amps ( about 1000 amp at 5 vac ) but I cant seem to get it thru the chamber wall without melting power transfer cables.? I have a 3/4 inch dia copper rod high amperage pass thru ( that came with the chamber ) and have 3 each 3/8" stranded copper wire cables running from the pass thru to the little tantalum box. Only one cable is shown in the picture but now there are 3 of them. ?

I just cant make that box glow red before the power cables do. ?

?? ?

?

So I am thinking of switching to plasma sputtering like the big boys do. ?

The big transformer works fine for driving the 36 emitters around the chamber ( 4 at a time ) so laying down aluminum is no problem.? It is putting down the overcoat that I cant seem to get started on. ?

So do you have any suggestions on how to make the tantalum box glow red or where to get a plasma system cost effectively ???

Drew in sunny Florida

On Thu, Oct 30, 2014 at 4:27 PM, dgrove@... [VacuumX] <VacuumX@...> wrote:

What issues are you having with the SiO that sputtering will fix? That's a
pretty big leap from resistive sources to sputtering.

Dave



------------------------------------

------------------------------------


------------------------------------

Yahoo Groups Links

<*> To visit your group on the web, go to:
? ?

<*> Your email settings:
? ? Individual Email | Traditional

<*> To change settings online go to:
? ?
? ? (Yahoo! ID required)

<*> To change settings via email:
? ? VacuumX-digest@...
? ? VacuumX-fullfeatured@...

<*> To unsubscribe from this group, send an email to:
? ? VacuumX-unsubscribe@...

<*> Your use of Yahoo Groups is subject to:
? ?

Here was the system as it looks assembled.? The CVC water cooled trap/baffle coolant loop is what leaked.? I really need to replace that thing but have not seen an 8" dia throat trap out on EBAY in years. ?

I have an entire 4" throat diff pump, water cooled trap and gate valve for sale. ?$400.? Motivated to sell as the wife will see the bill for all the new vac oil by month's end.? She never saw the coolness of vacuum equipment.

Drew in sunny Florida ?

?? ? ?

On Wed, Oct 15, 2014 at 11:19 AM, brian whatcott betwys1@... [VacuumX] <VacuumX@...> wrote:

?

Now THAT'S what I call a worth-while, MANLY post! Thanks for sharing. :-)

Brian Whatcott?????? Altus?? OK

On 10/14/2014 8:36 PM, Andrew Aurigema eosraptor@... [VacuumX] wrote:

Ok that is interesting.? I got lost in the back and forth.? Them peoples dont seem very friendly.? Did the pump work ??? ?

I have not posted much about my vacuum system ( 68" dia x 68" long chamber with twin 8" diff pumps ) because it was just working great for the last year or two.? I even put in a 500 gallon recirculation water supply for the diff pumps that is saving something on the planet.

Well you just knew it was too good to last.? I pumped down Sunday to start a coating operation on a spun cast epoxy mirror ( for a Dr bud in SC ) and come Monday when it was time to get serious and really pump down the system tore itself apart.? The inter-cooler sprang a leak while under high ( hot ) vacuum. ?

I had to make a field repair to an old CVC 8" throat inter-cooler years ago and my armature TIG welding choose this week to fail.? I will spare the gory details ..... suffice to say a gallon of coolant water dumped into an 8" dia diff pump in high hot vacuum was a pretty spectacular site.? By the time I could get it all locked down the leak had filled the chamber up with fog ?and slogged my Welch pumps.? Yes the fun instantly fouled both the diff pumps and both the Welch pumps and the hot cathode sensor and the telescope mirror and all 36 tungsten emitters in the chamber. ?

It has been so much fun wiping and cleaning my chamber.? I just cant remember the last time I spent that much quality time tearing the sytem all apart.? But I found the problem and now just have to TIG it back to pressure tight. ??

It seems DOW 704 oil really dont explode when you have a catastrophic failure.? It makes a mess but nothing actually got hurt.? I suppose it was worth the $500 it cost after all.? Sad they don't sell it anymore. ?

Anybody got a recommendation on replacement diff pump oil ???? I see Leskers has a version 702 and 704.? Anybody used it ???

Drew in sunny Florida?

On Tue, Oct 14, 2014 at 3:16 PM, geoani@... [VacuumX] <VacuumX@...> wrote:

?

Being a hardcore experimentalist I thought I'd test to see if this forum can still fog a mirror. (That's a metaphorical double entendre, I suppose.) Anyhow, a few months ago I designed and built a new kind of diffusion pump and thought I'd test the waters here with this link:

The whole idea went downhill very quickly over there as far as responses go. It's hard to find much of an audience when your discussing ways to obtain higher levels of deep nothingness. My wife has suggested that I start looking into prices for a lobotomy. She thinks I'd be better company after the procedure.

Ok that is interesting.? I got lost in the back and forth.? Them peoples dont seem very friendly.? Did the pump work ??? ?

I have not posted much about my vacuum system ( 68" dia x 68" long chamber with twin 8" diff pumps ) because it was just working great for the last year or two.? I even put in a 500 gallon recirculation water supply for the diff pumps that is saving something on the planet.

Well you just knew it was too good to last.? I pumped down Sunday to start a coating operation on a spun cast epoxy mirror ( for a Dr bud in SC ) and come Monday when it was time to get serious and really pump down the system tore itself apart.? The inter-cooler sprang a leak while under high ( hot ) vacuum. ?

I had to make a field repair to an old CVC 8" throat inter-cooler years ago and my armature TIG welding choose this week to fail.? I will spare the gory details ..... suffice to say a gallon of coolant water dumped into an 8" dia diff pump in high hot vacuum was a pretty spectacular site.? By the time I could get it all locked down the leak had filled the chamber up with fog ?and slogged my Welch pumps.? Yes the fun instantly fouled both the diff pumps and both the Welch pumps and the hot cathode sensor and the telescope mirror and all 36 tungsten emitters in the chamber. ?

It has been so much fun wiping and cleaning my chamber.? I just cant remember the last time I spent that much quality time tearing the sytem all apart.? But I found the problem and now just have to TIG it back to pressure tight. ??

It seems DOW 704 oil really dont explode when you have a catastrophic failure.? It makes a mess but nothing actually got hurt.? I suppose it was worth the $500 it cost after all.? Sad they don't sell it anymore. ?

Anybody got a recommendation on replacement diff pump oil ???? I see Leskers has a version 702 and 704.? Anybody used it ???

Drew in sunny Florida?

On Tue, Oct 14, 2014 at 3:16 PM, geoani@... [VacuumX] <VacuumX@...> wrote:

?

Being a hardcore experimentalist I thought I'd test to see if this forum can still fog a mirror. (That's a metaphorical double entendre, I suppose.) Anyhow, a few months ago I designed and built a new kind of diffusion pump and thought I'd test the waters here with this link:

The whole idea went downhill very quickly over there as far as responses go. It's hard to find much of an audience when your discussing ways to obtain higher levels of deep nothingness. My wife has suggested that I start looking into prices for a lobotomy. She thinks I'd be better company after the procedure.

?

Ok that is interesting.? I got lost in the back and forth.? Them peoples dont seem very friendly.? Did the pump work ??? ?

I have not posted much about my vacuum system ( 68" dia x 68" long chamber with twin 8" diff pumps ) because it was just working great for the last year or two.? I even put in a 500 gallon recirculation water supply for the diff pumps that is saving something on the planet.

Well you just knew it was too good to last.? I pumped down Sunday to start a coating operation on a spun cast epoxy mirror ( for a Dr bud in SC ) and come Monday when it was time to get serious and really pump down the system tore itself apart.? The inter-cooler sprang a leak while under high ( hot ) vacuum. ?

I had to make a field repair to an old CVC 8" throat inter-cooler years ago and my armature TIG welding choose this week to fail.? I will spare the gory details ..... suffice to say a gallon of coolant water dumped into an 8" dia diff pump in high hot vacuum was a pretty spectacular site.? By the time I could get it all locked down the leak had filled the chamber up with fog ?and slogged my Welch pumps.? Yes the fun instantly fouled both the diff pumps and both the Welch pumps and the hot cathode sensor and the telescope mirror and all 36 tungsten emitters in the chamber. ?

It has been so much fun wiping and cleaning my chamber.? I just cant remember the last time I spent that much quality time tearing the sytem all apart.? But I found the problem and now just have to TIG it back to pressure tight. ??

It seems DOW 704 oil really dont explode when you have a catastrophic failure.? It makes a mess but nothing actually got hurt.? I suppose it was worth the $500 it cost after all.? Sad they don't sell it anymore. ?

Anybody got a recommendation on replacement diff pump oil ???? I see Leskers has a version 702 and 704.? Anybody used it ???

Drew in sunny Florida?

On Tue, Oct 14, 2014 at 3:16 PM, geoani@... [VacuumX] <VacuumX@...> wrote:

?

Being a hardcore experimentalist I thought I'd test to see if this forum can still fog a mirror. (That's a metaphorical double entendre, I suppose.) Anyhow, a few months ago I designed and built a new kind of diffusion pump and thought I'd test the waters here with this link:

The whole idea went downhill very quickly over there as far as responses go. It's hard to find much of an audience when your discussing ways to obtain higher levels of deep nothingness. My wife has suggested that I start looking into prices for a lobotomy. She thinks I'd be better company after the procedure.

Flutz capacitors and tokamaks?

Guy Brandenburg
Sent from my iPhone so full of hilarious errors... ;-€}}

On Mar 2, 2014, at 5:37 PM, Dave McGuire <Mcguire@...
<mailto:Mcguire@...>> wrote:

On 02/27/2014 06:33 AM, R Parsons wrote:

Looking through there site, I had to keep reminding myself that I really
didnt need to start making a fusion reactor!! But who wouldn't want one!

I'm having the same difficulty. ;) I'm betting a lot of us are. I've
been reading about fusors for many years. They look like great fun, but
also a big time-sink...I don't need any more of those!

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA

?

On 02/27/2014 06:33 AM, R Parsons wrote:
> Looking through there site, I had to keep reminding myself that I really
> didnt need to start making a fusion reactor!! But who wouldn't want one!

I'm having the same difficulty. ;) I'm betting a lot of us are. I've
been reading about fusors for many years. They look like great fun, but
also a big time-sink...I don't need any more of those!

-Dave

--
Dave McGuire, AK4HZ
New Kensington, PA