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On 17/03/2023 20:58, John Larkin wrote:
On Fri, 17 Mar 2023 19:45:12 +0000, Fredxx <fredxx@spam.uk> wrote:
On 17/03/2023 18:47, Commander Kinsey wrote:
On Sat, 04 Mar 2023 12:16:59 -0000, Max Demian <max_demian@bigfoot.com
wrote:
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and
secondary.... You know, phases and all that.
You clearly shouldn\'t have anything to do with transformers and
diodes.
Fuck off you pompous ass. It\'s fun to play with things you don\'t
understand.
You seem to an awful lot of playing with things you don\'t understand.
If you think you understand everything, there\'s nothing to learn.
The smart ones do their research first before asking the sorts of
questions I was asking when I was 8.
Otherwise you are indeed correct. There is a saying, the more you know,
the more you realise you don\'t know.
You seem to an awful lot of playing with things you don\'t understand.
If you think you understand everything, there\'s nothing to learn.
On 17/03/2023 20:58, John Larkin wrote:
On Fri, 17 Mar 2023 19:45:12 +0000, Fredxx <fredxx@spam.uk> wrote:
On 17/03/2023 18:47, Commander Kinsey wrote:
On Sat, 04 Mar 2023 12:16:59 -0000, Max Demian <max_demian@bigfoot.com
wrote:
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and
secondary.... You know, phases and all that.
You clearly shouldn\'t have anything to do with transformers and diodes.
Fuck off you pompous ass. It\'s fun to play with things you don\'t
understand.
You seem to an awful lot of playing with things you don\'t understand.
If you think you understand everything, there\'s nothing to learn.
The smart ones do their research first before asking the sorts of
questions I was asking when I was 8.
On Fri, 17 Mar 2023 21:08:23 +0000, Fredxx <fredxx@spam.uk> wrote:
On 17/03/2023 20:58, John Larkin wrote:
On Fri, 17 Mar 2023 19:45:12 +0000, Fredxx <fredxx@spam.uk> wrote:
On 17/03/2023 18:47, Commander Kinsey wrote:
On Sat, 04 Mar 2023 12:16:59 -0000, Max Demian <max_demian@bigfoot.com
wrote:
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin
jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower
voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and
secondary.... You know, phases and all that.
You clearly shouldn\'t have anything to do with transformers and diodes.
Fuck off you pompous ass. It\'s fun to play with things you don\'t
understand.
You seem to an awful lot of playing with things you don\'t understand.
If you think you understand everything, there\'s nothing to learn.
The smart ones do their research first before asking the sorts of
questions I was asking when I was 8.
Then the proper response to any SED posting is \"look it up.\"
On Fri, 17 Mar 2023 21:08:23 +0000, Fredxx <fre...@spam.uk> wrote:
On 17/03/2023 20:58, John Larkin wrote:
On Fri, 17 Mar 2023 19:45:12 +0000, Fredxx <fre...@spam.uk> wrote:
On 17/03/2023 18:47, Commander Kinsey wrote:
On Sat, 04 Mar 2023 12:16:59 -0000, Max Demian <max_d...@bigfoot.com> wrote:
On 04/03/2023 01:23, Commander Kinsey wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jla...@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\" <C...@nospam.com> wrote:
You seem to an awful lot of playing with things you don\'t understand.
If you think you understand everything, there\'s nothing to learn.
The smart ones do their research first before asking the sorts of
questions I was asking when I was 8.
Then the proper response to any SED posting is \"look it up.\"
On Sat, 04 Mar 2023 16:05:37 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
I was actually talking about a stepup transformer. 120V to 6000V. Yes it\'s American, I got it cheap. To avoid finding a 6000V diode, I thought I could use a 120V diode. From all the answers it appears I was wrong to assume because the current is going one way through the primary it must be going the same way through the secondary. Actually the DC component is lost and the AC is passed, so I just get squint AC.
Trying to make a high voltage DC supply? You can get 1KV 1 amp diodes
for a few cents each. Those can be used in series.
When I was a kid, I used old neon sign transformers and 1B3 rectifier
tubes to make high voltage DC supplies. I couldn\'t afford a Variac so
adjusted the filament voltage to regulate the output voltage. I used a
D-cell battery and a rheostat, and somehow I\'m still alive.
On Sun, 05 Mar 2023 08:59:13 -0800, John Larkin wrote:
Two items of folk wisdom \"don\'t put diodes in series\" and \"don\'t put
diodes in parallel\" are mostly wrong.
The first company I worked for made dielectric preheaters for the plastics
industry. The were basically a 7.5 kW oscillator with the material placed
in the RF cavity. There rolled their own high voltage rectifiers and
capacitors. I forget how many diodes were in series with the whole
assembly potted into a brick with two lugs.
They operated in the FM band but the frequency change as the material
heated was minimal unlike the RF heat sealers that were known for their
whoosh sounding interference.
On the factory floor both were rumored to make you sterile or incredibly
fertile, take your pick.
On Sun, 05 Mar 2023 19:40:25 -0000, rbowman <bowman@montana.com> wrote:
On Sun, 05 Mar 2023 08:59:13 -0800, John Larkin wrote:
Two items of folk wisdom \"don\'t put diodes in series\" and \"don\'t put
diodes in parallel\" are mostly wrong.
The first company I worked for made dielectric preheaters for the plastics
industry. The were basically a 7.5 kW oscillator with the material placed
in the RF cavity. There rolled their own high voltage rectifiers and
capacitors. I forget how many diodes were in series with the whole
assembly potted into a brick with two lugs.
They operated in the FM band but the frequency change as the material
heated was minimal unlike the RF heat sealers that were known for their
whoosh sounding interference.
On the factory floor both were rumored to make you sterile or incredibly
fertile, take your pick.
Yeah.... like the 5G does? Hint - all this stuff is lower frequency than visible light. You have to reach UV before it has enough energy to damage cells.
On Sun, 19 Mar 2023 21:16:27 -0000, \"Commander Kinsey\"
C...@nospam.com> wrote:
On Sun, 05 Mar 2023 19:40:25 -0000, rbowman <bow...@montana.com> wrote:
On Sun, 05 Mar 2023 08:59:13 -0800, John Larkin wrote:
Two items of folk wisdom \"don\'t put diodes in series\" and \"don\'t put
diodes in parallel\" are mostly wrong.
The first company I worked for made dielectric preheaters for the plastics
industry. The were basically a 7.5 kW oscillator with the material placed
in the RF cavity. There rolled their own high voltage rectifiers and
capacitors. I forget how many diodes were in series with the whole
assembly potted into a brick with two lugs.
They operated in the FM band but the frequency change as the material
heated was minimal unlike the RF heat sealers that were known for their
whoosh sounding interference.
On the factory floor both were rumored to make you sterile or incredibly
fertile, take your pick.
Yeah.... like the 5G does? Hint - all this stuff is lower frequency than visible light. You have to reach UV before it has enough energy to damage cells.
Step into my microwave oven.
Lol. Back in the day with radar sets people did get burned But thatOn Sun, 19 Mar 2023 21:16:27 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sun, 05 Mar 2023 19:40:25 -0000, rbowman <bowman@montana.com> wrote:
On Sun, 05 Mar 2023 08:59:13 -0800, John Larkin wrote:
Two items of folk wisdom \"don\'t put diodes in series\" and \"don\'t put
diodes in parallel\" are mostly wrong.
The first company I worked for made dielectric preheaters for the plastics
industry. The were basically a 7.5 kW oscillator with the material placed
in the RF cavity. There rolled their own high voltage rectifiers and
capacitors. I forget how many diodes were in series with the whole
assembly potted into a brick with two lugs.
They operated in the FM band but the frequency change as the material
heated was minimal unlike the RF heat sealers that were known for their
whoosh sounding interference.
On the factory floor both were rumored to make you sterile or incredibly
fertile, take your pick.
Yeah.... like the 5G does? Hint - all this stuff is lower frequency than visible light. You have to reach UV before it has enough energy to damage cells.
Step into my microwave oven.
Lol. Back in the day with radar sets people did get burned But that
isn\'t radiation damage, that\'s pure dielectric heating.
Infra red radiation from a fire will cook you just as well
On 20/03/2023 20:07, The Natural Philosopher wrote:
Lol. Back in the day with radar sets people did get burned But that
isn\'t radiation damage, that\'s pure dielectric heating.
Infra red radiation from a fire will cook you just as well
Radar will cook you from the inside. Much faster.
Indeed, but its not direct radiation its dielectric heating
Andy
On Mon, 27 Mar 2023 10:58:08 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Fri, 17 Mar 2023 20:56:29 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Fri, 17 Mar 2023 20:06:43 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sat, 04 Mar 2023 03:04:07 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sat, 04 Mar 2023 01:23:17 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and secondary.... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
No idea what you mean by dots.
Dots are little round filled circles. They indicate winding polarity.
Never seen one with dots.
How can I draw the winding currents? I thought they would be in the same direction, but you say not. And what if you wound one clockwise and one anticlockwise?
First hit from google:
https://circuitdigest.com/article/understanding-dot-convention-in-transformers
On Mon, 27 Mar 2023 13:36:47 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Mon, 27 Mar 2023 10:58:08 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Fri, 17 Mar 2023 20:56:29 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Fri, 17 Mar 2023 20:06:43 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sat, 04 Mar 2023 03:04:07 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sat, 04 Mar 2023 01:23:17 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and secondary.... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
No idea what you mean by dots.
Dots are little round filled circles. They indicate winding polarity.
Never seen one with dots.
How can I draw the winding currents? I thought they would be in the same direction, but you say not. And what if you wound one clockwise and one anticlockwise?
First hit from google:
https://circuitdigest.com/article/understanding-dot-convention-in-transformers
I see. Only time I\'ve needed phase was when I wired some secondaries in series. I did so, checked if I\'d added or subtracted voltage, then reversed the connections if necessary.
So If I wind two coils round a transformer core, does the current go the same way in each?
On Mon, 03 Apr 2023 22:01:19 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Mon, 27 Mar 2023 13:36:47 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Mon, 27 Mar 2023 10:58:08 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Fri, 17 Mar 2023 20:56:29 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Fri, 17 Mar 2023 20:06:43 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sat, 04 Mar 2023 03:04:07 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sat, 04 Mar 2023 01:23:17 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and secondary.... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
No idea what you mean by dots.
Dots are little round filled circles. They indicate winding polarity.
Never seen one with dots.
How can I draw the winding currents? I thought they would be in the same direction, but you say not. And what if you wound one clockwise and one anticlockwise?
First hit from google:
https://circuitdigest.com/article/understanding-dot-convention-in-transformers
I see. Only time I\'ve needed phase was when I wired some secondaries in series. I did so, checked if I\'d added or subtracted voltage, then reversed the connections if necessary.
So If I wind two coils round a transformer core, does the current go the same way in each?
Depends on what they are connected to.
On Tue, 04 Apr 2023 03:59:42 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Mon, 03 Apr 2023 22:01:19 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Mon, 27 Mar 2023 13:36:47 +0100, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Mon, 27 Mar 2023 10:58:08 +0100, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Fri, 17 Mar 2023 20:56:29 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Fri, 17 Mar 2023 20:06:43 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sat, 04 Mar 2023 03:04:07 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sat, 04 Mar 2023 01:23:17 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
On Sun, 26 Feb 2023 16:13:19 -0000, John Larkin <jlarkin@highlandsnipmetechnology.com> wrote:
On Sun, 26 Feb 2023 09:45:26 -0000, \"Commander Kinsey\"
CK1@nospam.com> wrote:
Can I put a diode BEFORE a step up transformer so I can use a lower voltage diode for half wave rectification?
Ah. Humor. Thanks for the laugh.
I thought current always flowed the same way in primary and secondary.... You know, phases and all that.
Assume a loaded bifilar transformer, both dots up, and draw the
winding currents.
No idea what you mean by dots.
Dots are little round filled circles. They indicate winding polarity.
Never seen one with dots.
How can I draw the winding currents? I thought they would be in the same direction, but you say not. And what if you wound one clockwise and one anticlockwise?
First hit from google:
https://circuitdigest.com/article/understanding-dot-convention-in-transformers
I see. Only time I\'ve needed phase was when I wired some secondaries in series. I did so, checked if I\'d added or subtracted voltage, then reversed the connections if necessary.
So If I wind two coils round a transformer core, does the current go the same way in each?
Depends on what they are connected to.
Why would that make a difference?