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just how much power could you get from the old school ,N51X 115vac to115vac isolation transformer @35 volt amps AC ?(so what do that mean)
through a full wave bridge at 400 vdc and a big hunking 100uf cap at 450vdc i never got more than 165vdc out of it
but i have no idea of current of wattage?when it becomes DC,
so i will need some help from all you math heads out there.with the dc output at 165 vdc What is the current and wattage DC of the power suply ? from a 35volt amp ac transformer that is 115vac to115 vac

On 10-07-22 02:55 PM, westdave wrote:

just how much power could you get from the old school ,N51X 115vac to115vac isolation transformer @35 volt amps AC ?(so what do that mean)
through a full wave bridge at 400 vdc and a big hunking 100uf cap at 450vdc i never got more than 165vdc out of it
but i have no idea of current of wattage?when it becomes DC,
so i will need some help from all you math heads out there.with the dc output at 165 vdc What is the current and wattage DC of the power suply ? from a 35volt amp ac transformer that is 115vac to115 vac

In DC watts is Volts times amps. IN ac it gets a bit fuzzy because the volts may lead or lag the current. (depending on the nature of the load.) still 35/115 is about 300Ma...

If you check the hammond catalog they have several B+ transformers with ratings.



look at the 261 and and 260 series, or even the 300 series

--
Charles MacDonald Stittsville Ontario
cmacd@... Just Beyond the Fringe

No Microsoft Products were used in sending this e-mail.

In DC watts is Volts times amps. IN ac it gets a bit fuzzy because the
volts may lead or lag the current. (depending on the nature of the
load.) still 35/115 is about 300Ma...

If you check the hammond catalog they have several B+ transformers with
ratings.



look at the 261 and and 260 series, or even the 300 series

--

Additionally when you use a full wave bridge, the DC voltage out is higher than the RMS AC voltage in, so the RMS AC current on the transformer secondary is higher than the DC current drawn by the load. If I remember correctly, you take the desired DC current and multiply it by 1.8 to size the transformer.

What I've used in my clock and FLW box is a transformer with two primaries and two secondaries. I power one of the primaries from 120V, then take the other primary, use it as a secondary and wire it in series with the secondaries to get the anode voltage. The +5V supply for the logic is also derived from one of the secondaries, which is effectively a tap on one large winding. You can only use half the VA capacity of the transformer using it in this way but in my case that was more than enough.

On 10-07-23 03:13 PM, James wrote:

Additionally when you use a full wave bridge, the DC voltage out is
higher than the RMS AC voltage in, so the RMS AC current on the
transformer secondary is higher than the DC current drawn by the
load. If I remember correctly, you take the desired DC current and
multiply it by 1.8 to size the transformer.

I think the Hammond page has a small tutorial on Power suply design using "Brute force" transformers

Snoop around


--
Charles MacDonald Stittsville Ontario
cmacd@... Just Beyond the Fringe

No Microsoft Products were used in sending this e-mail.