about 1mF and 30 ohms gives me a 30ms TC, so 0.01s isn't going to
Wow, that's weird. Sorry, I don't think I can help.
discharge 20KV through a 75 ohm resistor, that was 266 amperes, or aOn Mar 4, 6:25 pm, sparky <sparky...@yahoo.com> wrote:
On Mar 4, 3:20 pm, lerameur <leram...@yahoo.com> wrote:
On 4 mar, 14:27, Ecnerwal
MyNameForw...@ReplaceWithMyVices.Com.invalid> wrote:
In article <K-OdneKLsMMhmQ3WnZ2dnUVZ_tCdn...@web-ster.com>,
Tim Wescott <t...@seemywebsite.now> wrote:
Turn-off becomes an issue. I know that there are ways to turn off an
SCR on a DC supply, but it's some wacky thing involving an auxiliary
inductor that snaps the current off briefly so the SCR can turn off --
it all looks pretty smoky to me.
It's definitely getting into the realm of tubes (mostly thyratrons)
ruling, though at high amperage the tubes are available, but do tend to
cost a few thousand dollars. At the lower amperage ranges, if you stick
to those tubes that are still commonly available they can cost a lot
less than silicon to do the same job.
On the third hand, the application becomes highly suspect as I can think
of a number of nefarious uses this might be aiming towards I wouldn't
care to help with. Not quite as blatant as the person a few months ago
that was evidently looking for help in designing a roadside bomb, but a
spark gap creates an infernal amount of RF noise...
--
Cats, coffee, chocolate...vices to live by
I am looking to make a unidirectional spark. I also thought of using
like the old days a rotary spark gap, but with a 3600 rpm motor, even
with 10 contacts around I get 3600rpm/60 =600rps with 10 contacts =
6000hz. I guess 6000hz is good enough.
Also with a higher voltage, could I increase the resistance.?
JP- Hide quoted text -
- Show quoted text -
You could go higher.
600 volts is certainly not a HUGE voltage.
Ok here is the circuit I am trying to replicate. Some of you will say
it is not possible, it is not concrete, but hey I am just trying it
out.
Like I said , I just want to make a simple circuit with a capacitor
discharging through a spark gap for now, nothing else.
http://www.energeticforum.com/renewable-energy/3235-gray-tube-replication-2.html&usg=__iSdcL6jpOkRkqf7S8vhO8UyJzew=&h=711&w=831&sz=132&hl=en&start=6&sig2=-iiXL_uogSvS1uj0DcYeXw&um=1&itbs=1&tbnid=ZeLwLSgYlT4p6M:&tbnh=123&tbnw=144&prev=/images%3Fq%3Dgrey%2Btube%2Bbedini%26um%3D1%26hl%3Den%26client%3Dfirefox-a%26sa%3DN%26rls%3Dorg.mozilla:en-USfficial%26tbs%3Disch:1&ei=bDGQS7j0N8_I_gbih4nVDA
Also, in the schematic shown, there is a diode that seems to be on
backwards, but some dud on the web site says it is not.. I still think
it is on backward, can somebody has an explanation for that. The
circuit is doable, the effect well not so much I think
thanks
JP.
You should try to get a hydrogen thyratron tube, I used one in 1967 to
but it was big,(15 cm high) and the ingnition voltage was 500 volt.On Mar 4, 9:36 pm, Sjouke Burry <burrynulnulf...@ppllaanneett.nnll
wrote:
lerameur wrote:
On Mar 4, 6:25 pm, sparky <sparky...@yahoo.com> wrote:
On Mar 4, 3:20 pm, lerameur <leram...@yahoo.com> wrote:
On 4 mar, 14:27, Ecnerwal
MyNameForw...@ReplaceWithMyVices.Com.invalid> wrote:
In article <K-OdneKLsMMhmQ3WnZ2dnUVZ_tCdn...@web-ster.com>,
Tim Wescott <t...@seemywebsite.now> wrote:
Turn-off becomes an issue. I know that there are ways to turn off an
SCR on a DC supply, but it's some wacky thing involving an auxiliary
inductor that snaps the current off briefly so the SCR can turn off --
it all looks pretty smoky to me.
It's definitely getting into the realm of tubes (mostly thyratrons)
ruling, though at high amperage the tubes are available, but do tend to
cost a few thousand dollars. At the lower amperage ranges, if you stick
to those tubes that are still commonly available they can cost a lot
less than silicon to do the same job.
On the third hand, the application becomes highly suspect as I can think
of a number of nefarious uses this might be aiming towards I wouldn't
care to help with. Not quite as blatant as the person a few months ago
that was evidently looking for help in designing a roadside bomb, but a
spark gap creates an infernal amount of RF noise...
--
Cats, coffee, chocolate...vices to live by
I am looking to make a unidirectional spark. I also thought of using
like the old days a rotary spark gap, but with a 3600 rpm motor, even
with 10 contacts around I get 3600rpm/60 =600rps with 10 contacts =
6000hz. I guess 6000hz is good enough.
Also with a higher voltage, could I increase the resistance.?
JP- Hide quoted text -
- Show quoted text -
You could go higher.
600 volts is certainly not a HUGE voltage.
Ok here is the circuit I am trying to replicate. Some of you will say
it is not possible, it is not concrete, but hey I am just trying it
out.
Like I said , I just want to make a simple circuit with a capacitor
discharging through a spark gap for now, nothing else.
http://www.energeticforum.com/renewable-energy/3235-gray-tube-replica...
Also, in the schematic shown, there is a diode that seems to be on
backwards, but some dud on the web site says it is not.. I still think
it is on backward, can somebody has an explanation for that. The
circuit is doable, the effect well not so much I think
thanks
JP.
You should try to get a hydrogen thyratron tube, I used one in 1967 to
discharge 20KV through a 75 ohm resistor, that was 266 amperes, or a
peak power of 266*226*75=5.3 mega watt.....
Used to make cosmic rays visible.
Lots of fun(and problems, and fireworks).
Only that if I reduce the carbon cube or eliminate I will basically
get almost next to zero resistance, but I do want to add a little bit
of a resistance in the circuit, how much ?? I do not know yet.
and where do you get a hydrogen thyratron tube?
JP
Form the university storage
Only that if I reduce the carbon cube or eliminate I will basically
---
The easiest thyratron to find would be a photographic strobe lightlerameur wrote:
It's definitely getting into the realm of tubes (mostly thyratrons)
and where do you get a hydrogen thyratron tube?
Form the university storage
but it was big,(15 cm high) and the ingnition voltage was 500 volt.