On 9/23/2021 10:32 AM, jlarkin@highlandsniptechnology.com wrote:> On Thu, 23 Sep 2021 00:29:28 -0400, bitrex <user@example.net> wrote: > >> On 9/22/2021 10:25 PM, jlarkin@highlandsniptechnology.com wrote: >>> On Wed, 22 Sep 2021 17:08:51 -0400, bitrex <user@example.net> wrote: >>> >>>> On 9/22/2021 1:27 PM, John Larkin wrote: >>>>> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >>>>> >>>>>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>>>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>>>>> well, which would be clocked rather than self-oscillating. >>>>>>>>> >>>>>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>>>>> might be something appropriate with a third winding to bootstrap the >>>>>>>>> primary swing >>>>>>>> Here is a sine oscillator. >>>>>>>> >>>>>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>>>>> >>>>>>>> The output amplitude is very stable with time and temperature. The >>>>>>>> voltage at the collector is reliably 2xV+ p-p. >>>>>>>> >>>>>>>> I invented this when I was a kid, still in college. It was used in the >>>>>>>> Boresight Alignment Kit for the C5A. >>>>>>> >>>>>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>>>>> >>>>>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>>>>> >>>>>> >>>>>> For high step-ups at low powers with isolation I like the idea of an >>>>>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>>>>> a continuous input current. And the transformer turns ratio doesn't need >>>>>> to be large to get a large step-up so off-the-shelf components should be >>>>>> easy to find. >>>>>> >>>>>> Lots of variations of the non-isolated Cuk online but seemingly not as >>>>>> much about the isolated kind. >>>>>> >>>>> >>>>> What Sloman can't understand, he insults. That happens a lot. >>>>> >>>> >>>> Guys, are you doing OK: >>>> >>>> <https://youtu.be/S1xxcKCGljY?t=64> >>> >>> Wow. So many people are so maladjusted to being what they are. >>> >>> >> >> She's significantly more entertaining than the average SED poster is on >> the topic of politics > > But she sucks at electronic design. > >Ya most philosophy PhDs or whatever you probably wouldn't have do that
Turbo Royer/Baxandall in boost configuration
Started by ●September 20, 2021
Reply by ●September 23, 20212021-09-23
Reply by ●September 23, 20212021-09-23
On Thu, 23 Sep 2021 10:49:35 -0400, bitrex <user@example.net> wrote:>On 9/23/2021 10:32 AM, jlarkin@highlandsniptechnology.com wrote: >> On Thu, 23 Sep 2021 00:29:28 -0400, bitrex <user@example.net> wrote: >> >>> On 9/22/2021 10:25 PM, jlarkin@highlandsniptechnology.com wrote: >>>> On Wed, 22 Sep 2021 17:08:51 -0400, bitrex <user@example.net> wrote: >>>> >>>>> On 9/22/2021 1:27 PM, John Larkin wrote: >>>>>> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >>>>>> >>>>>>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>>>>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>>>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>>>>>> well, which would be clocked rather than self-oscillating. >>>>>>>>>> >>>>>>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>>>>>> might be something appropriate with a third winding to bootstrap the >>>>>>>>>> primary swing >>>>>>>>> Here is a sine oscillator. >>>>>>>>> >>>>>>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>>>>>> >>>>>>>>> The output amplitude is very stable with time and temperature. The >>>>>>>>> voltage at the collector is reliably 2xV+ p-p. >>>>>>>>> >>>>>>>>> I invented this when I was a kid, still in college. It was used in the >>>>>>>>> Boresight Alignment Kit for the C5A. >>>>>>>> >>>>>>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>>>>>> >>>>>>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>>>>>> >>>>>>> >>>>>>> For high step-ups at low powers with isolation I like the idea of an >>>>>>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>>>>>> a continuous input current. And the transformer turns ratio doesn't need >>>>>>> to be large to get a large step-up so off-the-shelf components should be >>>>>>> easy to find. >>>>>>> >>>>>>> Lots of variations of the non-isolated Cuk online but seemingly not as >>>>>>> much about the isolated kind. >>>>>>> >>>>>> >>>>>> What Sloman can't understand, he insults. That happens a lot. >>>>>> >>>>> >>>>> Guys, are you doing OK: >>>>> >>>>> <https://youtu.be/S1xxcKCGljY?t=64> >>>> >>>> Wow. So many people are so maladjusted to being what they are. >>>> >>>> >>> >>> She's significantly more entertaining than the average SED poster is on >>> the topic of politics >> >> But she sucks at electronic design. >> >> > >Ya most philosophy PhDs or whatever you probably wouldn't have do thatTheir best career path is in food service. -- Father Brown's figure remained quite dark and still; but in that instant he had lost his head. His head was always most valuable when he had lost it.
Reply by ●September 23, 20212021-09-23
On 9/23/2021 11:11 AM, jlarkin@highlandsniptechnology.com wrote:> On Thu, 23 Sep 2021 10:49:35 -0400, bitrex <user@example.net> wrote: > >> On 9/23/2021 10:32 AM, jlarkin@highlandsniptechnology.com wrote: >>> On Thu, 23 Sep 2021 00:29:28 -0400, bitrex <user@example.net> wrote: >>> >>>> On 9/22/2021 10:25 PM, jlarkin@highlandsniptechnology.com wrote: >>>>> On Wed, 22 Sep 2021 17:08:51 -0400, bitrex <user@example.net> wrote: >>>>> >>>>>> On 9/22/2021 1:27 PM, John Larkin wrote: >>>>>>> On Tue, 21 Sep 2021 21:28:43 -0400, bitrex <user@example.net> wrote: >>>>>>> >>>>>>>> On 9/21/2021 9:10 PM, Anthony William Sloman wrote: >>>>>>>>> On Wednesday, September 22, 2021 at 2:16:41 AM UTC+10, jla...@highlandsniptechnology.com wrote: >>>>>>>>>> On Mon, 20 Sep 2021 17:45:12 -0400, bitrex <us...@example.net> wrote: >>>>>>>>>>> Is it possible to take your standard Baxandall and tap the capacitor, >>>>>>>>>>> take an aux winding off the secondary and feed a somewhat higher DC >>>>>>>>>>> voltage to the cap (through the usual two-diode supply handoff >>>>>>>>>>> arrangement), and use it to feed the gate drive to the transistors as >>>>>>>>>>> well, which would be clocked rather than self-oscillating. >>>>>>>>>>> >>>>>>>>>>> The goal would be to have a quiet step-up converter that could do say 5 >>>>>>>>>>> to ~150 in one step, or maybe with a single multiplier stage. That seems >>>>>>>>>>> hard to do with anything off the shelf as compact pulse transformers >>>>>>>>>>> with the appropriate turns ratio don't seem to be really available, you >>>>>>>>>>> get into CFL-type transformers whose ratios are too large, but there >>>>>>>>>>> might be something appropriate with a third winding to bootstrap the >>>>>>>>>>> primary swing >>>>>>>>>> Here is a sine oscillator. >>>>>>>>>> >>>>>>>>>> https://www.dropbox.com/s/wqygdxrcr2egxsv/AGC_Sine_Osc.jpg?raw-1 >>>>>>>>>> >>>>>>>>>> The output amplitude is very stable with time and temperature. The >>>>>>>>>> voltage at the collector is reliably 2xV+ p-p. >>>>>>>>>> >>>>>>>>>> I invented this when I was a kid, still in college. It was used in the >>>>>>>>>> Boresight Alignment Kit for the C5A. >>>>>>>>> >>>>>>>>> For a rather undemanding understanding of "very stable". None of Vbe, saturation Vce, and current gain aren't all that stable. >>>>>>>>> >>>>>>>>> Seriously stable stuff demodulates the output - carefully - compares it with a good quality voltage reference and twiddles the loop gain to keep the output amplitude where you want it >>>>>>>>> >>>>>>>> >>>>>>>> For high step-ups at low powers with isolation I like the idea of an >>>>>>>> isolated Cuk too. Not as quiet as driving sines, but has the benefit of >>>>>>>> a continuous input current. And the transformer turns ratio doesn't need >>>>>>>> to be large to get a large step-up so off-the-shelf components should be >>>>>>>> easy to find. >>>>>>>> >>>>>>>> Lots of variations of the non-isolated Cuk online but seemingly not as >>>>>>>> much about the isolated kind. >>>>>>>> >>>>>>> >>>>>>> What Sloman can't understand, he insults. That happens a lot. >>>>>>> >>>>>> >>>>>> Guys, are you doing OK: >>>>>> >>>>>> <https://youtu.be/S1xxcKCGljY?t=64> >>>>> >>>>> Wow. So many people are so maladjusted to being what they are. >>>>> >>>>> >>>> >>>> She's significantly more entertaining than the average SED poster is on >>>> the topic of politics >>> >>> But she sucks at electronic design. >>> >>> >> >> Ya most philosophy PhDs or whatever you probably wouldn't have do that > > Their best career path is in food service. > > >Just a back of the envelope calculation based on subscribers and YT royalties and that particular philosophy PhD is pulling maybe 10G a month from views and Patreons and such. Being an entertainer is a job
