https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is >another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6 >transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin <jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>:
https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is
another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6
transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
On 2023/11/26 8:34 a.m., Jan Panteltje wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin
<jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>: >>
https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is
another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6
transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
Damn, another Rabbit Hole!
Transformers...the headache (hard to find) of restoration of jukeboxes
and some pinball games - so now, thanks John & Jan!, I'm looking at lamination and bobbin suppliers and thinking of building my own...
https://ascocomponents.co.uk/laminations/ei-laminations/
https://www.leswilliams.co.uk/products/transformer-bobbins
Why are these people all in the UK?
John ;-#)#
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin ><jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>:
https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is >>another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6 >>transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
On Sun, 26 Nov 2023 16:34:15 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin
<jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>: >>
https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is
another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6
transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
The math of ordering a standard part is simpler. And the parts cost
about 1/20 as much.
I only design what I can't buy. Weird stuff. I've never seen a transmission-line transformer for sale, or maybe inside a big metal
box.
[...]
On 11/26/23 20:24, John Larkin wrote:
On Sun, 26 Nov 2023 16:34:15 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin >>> <jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>: >>>
https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is >>>> another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6
transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
The math of ordering a standard part is simpler. And the parts cost
about 1/20 as much.
I only design what I can't buy. Weird stuff. I've never seen a
transmission-line transformer for sale, or maybe inside a big metal
box.
[...]
Mini-circuits sells what are basically Ruthroff-type transmission
line transformers in dip or SMD packages. They are wound with wire.
I've never seen a bare transformer wound with coaxial cable for sale.
(Unless you want to include some quarter-wave dielectric resonators
into your definition of transformers.) They always seem to come in >connectorized metal boxes. I've made plenty myself though. Once in
a while is fine, but you don't want to have to do it in production >quantities.
Jeroen Belleman
On Sun, 26 Nov 2023 20:58:31 +0100, Jeroen Belleman
<jeroen@nospam.please> wrote:
On 11/26/23 20:24, John Larkin wrote:
On Sun, 26 Nov 2023 16:34:15 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin >>>> <jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>: >>>>
<https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1>
My PCB guy is overloaded, so I've taken over my board layout, which is >>>>> another 3-phase alternator simulator. I enjoy doing a PCB layout now >>>>> and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about >>>>> 200 watts. What's scary is that those purple logic traces on layer 6 >>>>> transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
<https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1> >>>>>
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
The math of ordering a standard part is simpler. And the parts cost
about 1/20 as much.
I only design what I can't buy. Weird stuff. I've never seen a
transmission-line transformer for sale, or maybe inside a big metal
box.
[...]
Mini-circuits sells what are basically Ruthroff-type transmission
line transformers in dip or SMD packages. They are wound with wire.
I've never seen a bare transformer wound with coaxial cable for sale. >>(Unless you want to include some quarter-wave dielectric resonators
into your definition of transformers.) They always seem to come in >>connectorized metal boxes. I've made plenty myself though. Once in
a while is fine, but you don't want to have to do it in production >>quantities.
Jeroen Belleman
We have a few products that use transmission-line transformers, which
we make. This is on the high-voltage option of our P500 digital delay >generator:
<https://www.dropbox.com/s/pmecggbi463ipes/TX_1.jpg?raw=1>
The connectorized cable is a stock part and the connectors are SMT on
the board, so it's fairly easy to assemble.
Dielectric resonators are usually shorted on one end, and tend to be
crazy low impedances as tx lines, like 10 ohms.
On Sun, 26 Nov 2023 16:34:15 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin >><jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>:
https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is >>>another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6 >>>transition from ground referenced (left of the Coilraft planar >>>transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
The math of ordering a standard part is simpler. And the parts cost
about 1/20 as much.
I only design what I can't buy. Weird stuff. I've never seen a >transmission-line transformer for sale, or maybe inside a big metal
box.
Incidentally, Coilcraft does custom versions of that planar
transformer.
For modest numbers of turns, you can make the windings on your PC
board and optionally snap a ferrite core onto both sides of the board.
Still a hassle.
I was wondering about using two halves of a pot core, bolted on to the
board, with the FR4 making a rather large air gap.
On 2023/11/26 8:34 a.m., Jan Panteltje wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin
<jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>: >>
https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is
another 3-phase alternator simulator. I enjoy doing a PCB layout now
and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about
200 watts. What's scary is that those purple logic traces on layer 6
transition from ground referenced (left of the Coilraft planar
transformer) to referenced to N, the isolated common and 3-phase
neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
Damn, another Rabbit Hole!
Transformers...the headache (hard to find) of restoration of jukeboxes
and some pinball games - so now, thanks John & Jan!, I'm looking at >lamination and bobbin suppliers and thinking of building my own...
https://ascocomponents.co.uk/laminations/ei-laminations/
https://www.leswilliams.co.uk/products/transformer-bobbins
Why are these people all in the UK?
John ;-#)#
On a sunny day (Sun, 26 Nov 2023 11:24:14 -0800) it happened John Larkin ><jl@997PotHill.com> wrote in <tc67mipuqp22ja3o24pu3n5k01ofmavihb@4ax.com>:
On Sun, 26 Nov 2023 16:34:15 GMT, Jan Panteltje <alien@comet.invalid> >>wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin >>><jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>: >>> >>>>https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is >>>>another 3-phase alternator simulator. I enjoy doing a PCB layout now >>>>and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about >>>>200 watts. What's scary is that those purple logic traces on layer 6 >>>>transition from ground referenced (left of the Coilraft planar >>>>transformer) to referenced to N, the isolated common and 3-phase >>>>neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
The math of ordering a standard part is simpler. And the parts cost
about 1/20 as much.
I only design what I can't buy. Weird stuff. I've never seen a >>transmission-line transformer for sale, or maybe inside a big metal
box.
Incidentally, Coilcraft does custom versions of that planar
transformer.
For modest numbers of turns, you can make the windings on your PC
board and optionally snap a ferrite core onto both sides of the board. >>Still a hassle.
I was wondering about using two halves of a pot core, bolted on to the >>board, with the FR4 making a rather large air gap.
That would also break the outside magnetic coupling,
so basically get you very little core effect.
Normally in a potcore with airgap only the inner part is shorter, touches less.
?
Potcores are nice.
https://panteltje.nl/pub/8052AH_BASIC_computer/8052AH_BASIC_computer_inside_img_1727.jpg
eighties... EPROM programming voltage generator...
https://panteltje.nl/pub/8052AH_BASIC_computer/dc_dc_converter_detail/5V_to_30V_converter.jpg
almost a sinewave, no switcher noise...
On Mon, 27 Nov 2023 03:29:31 GMT, Jan Panteltje <alien@comet.invalid>
wrote:
On a sunny day (Sun, 26 Nov 2023 11:24:14 -0800) it happened John Larkin >><jl@997PotHill.com> wrote in <tc67mipuqp22ja3o24pu3n5k01ofmavihb@4ax.com>:
On Sun, 26 Nov 2023 16:34:15 GMT, Jan Panteltje <alien@comet.invalid> >>>wrote:
On a sunny day (Sun, 26 Nov 2023 07:17:39 -0800) it happened John Larkin >>>><jl@997PotHill.com> wrote in <odn6mi1b6p99mpku923anu2l7clbh7ejpo@4ax.com>: >>>> >>>>>https://www.dropbox.com/scl/fi/lujsxfrwlaiocsa2y7k60/P942_DC-DC_12.jpg?rlkey=jslmsa1si2kwbk3l00wph9dhe&raw=1
My PCB guy is overloaded, so I've taken over my board layout, which is >>>>>another 3-phase alternator simulator. I enjoy doing a PCB layout now >>>>>and then.
Anyway, that's a floating power supply, +48 to isolated +-60 at about >>>>>200 watts. What's scary is that those purple logic traces on layer 6 >>>>>transition from ground referenced (left of the Coilraft planar >>>>>transformer) to referenced to N, the isolated common and 3-phase >>>>>neutral, layer 5 split plane.
I love these things:
https://www.dropbox.com/s/3d093msdmuinhxs/Coilcraft_PL300.jpg?raw=1
Coilcraft does great stuff.
When I need a transformer I just wind one...
https://panteltje.nl/pub/ultrasonic_antifouling_bigger_transformer_IMG_5179.JPG
the math is simple
https://panteltje.nl/pub/ultrasonic_anti_fouling_circuit_diagram_IMG_5144.JPG
https://panteltje.nl/pub/home_made_1_to_33_hv_transformer_img_3096.jpg
The math of ordering a standard part is simpler. And the parts cost
about 1/20 as much.
I only design what I can't buy. Weird stuff. I've never seen a >>>transmission-line transformer for sale, or maybe inside a big metal
box.
Incidentally, Coilcraft does custom versions of that planar
transformer.
For modest numbers of turns, you can make the windings on your PC
board and optionally snap a ferrite core onto both sides of the board. >>>Still a hassle.
I was wondering about using two halves of a pot core, bolted on to the >>>board, with the FR4 making a rather large air gap.
That would also break the outside magnetic coupling,
so basically get you very little core effect.
Normally in a potcore with airgap only the inner part is shorter, touches less.
?
Potcores are nice.
https://panteltje.nl/pub/8052AH_BASIC_computer/8052AH_BASIC_computer_inside_img_1727.jpg
eighties... EPROM programming voltage generator...
https://panteltje.nl/pub/8052AH_BASIC_computer/dc_dc_converter_detail/5V_to_30V_converter.jpg
almost a sinewave, no switcher noise...
That last one has a base bias scheme that is more subtle than it
looks.
I did the same thing, but with the feedback winding in the emitter,
for a gadget used on the C5A transport.
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