I found a 400V part on Mouser and ordered that.
> -Original Message-
> From: Jonathan Chapman
> Sent: 18 February 2022 21:23
> To: r...@jarratt.me.uk; Rob Jarratt ; General
> Discussion: On-Topic and Off-Topic Posts
> Subject: RE: Testing H745 Regulators
>
> &g
> I always forget that the VAC is the RMS and not the peak-to-peak. I will
> look for a minimum rating of 100V.
600V bridge modules are often more cost effective, and more likely to be in
stock. That's why I went with the Vishay part I used.
If you can't find what you need due to shortages, you
On 2022-Feb-17, at 11:40 PM, Rob Jarratt wrote:
>> -Original Message-
>> From: Brent Hilpert
>> On 2022-Feb-17, at 2:38 PM, Rob Jarratt wrote:
-Original Message-
From: Brent Hilpert
20V on a 10 ohm load: current = 2A.
15V, 1.5A.
In this regulat
> -Original Message-
> From: Brent Hilpert
> Sent: 18 February 2022 06:30
> To: r...@jarratt.me.uk; General Discussion: On-Topic and Off-Topic Posts
>
> Subject: Re: Testing H745 Regulators
>
> On 2022-Feb-17, at 2:38 PM, Rob Jarratt wrote:
> >> ---
On 2022-Feb-17, at 2:38 PM, Rob Jarratt wrote:
>> -Original Message-
>> From: Brent Hilpert
>>
>> 20V on a 10 ohm load: current = 2A.
>> 15V, 1.5A.
>>
>> In this regulator design there is no path for more current than that which
>> the
>> load draws, aside from temporary peak currents t
> Discussion: On-Topic and Off-Topic Posts
> Subject: RE: Testing H745 Regulators
>
> I used a Vishay GBPC3506W-E4/51, which is 600V 35A, 400A inrush rated.
> Looks like they're currently on-order at Mouser, I don't know about other
> suppliers.
>
> The GBPC3506W
gt; > > -Original Message-
> > >
> > > From: Brent Hilpert bhilp...@shaw.ca
> > >
> > > Sent: 27 January 2022 03:33
> > >
> > > To: r...@jarratt.me.uk; Rob Jarratt robert.jarr...@ntlworld.com;
> > >
> > &
m: Rob Jarratt
> Sent: 17 February 2022 22:38
> To: 'Brent Hilpert' ; r...@jarratt.me.uk; 'General
> Discussion: On-Topic and Off-Topic Posts'
> Subject: RE: Testing H745 Regulators
>
> Sorry it has been a while responding. I have been looking further at my
H74
3
> To: r...@jarratt.me.uk; Rob Jarratt ; General
> Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Testing H745 Regulators
>
> On 2022-Jan-26, at 3:41 PM, Rob Jarratt via cctalk wrote:
> > I am trying to test a couple of H745 regulators with a DC bench PSU
> >
The guys at RICM have seen a problem with these supplies that if the output
cap is bad it won't start switching properly. It goes into a mode where it
acts as a linear regulator. As far as I remember they the a spice
simulation that also indicated this when the output cap had low
capacitance.
Do y
On 2022-Jan-26, at 3:41 PM, Rob Jarratt via cctalk wrote:
> I am trying to test a couple of H745 regulators with a DC bench PSU and I am
> having some problems with testing them.
>
> My bench PSU is a twin unit so I can supply the +15V required as well as the
> "AC" input using 20VDC from the othe
00:11
> >
> > To: r...@jarratt.me.uk; Rob Jarratt robert.jarr...@ntlworld.com; General
> >
> > Discussion: On-Topic and Off-Topic Posts cctalk@classiccmp.org
> >
> > Subject: RE: Testing H745 Regulators
> >
> > Any chance you have a second supply yo
> -Original Message-
> From: W2HX
> Sent: 27 January 2022 00:11
> To: r...@jarratt.me.uk; Rob Jarratt ; General
> Discussion: On-Topic and Off-Topic Posts
> Subject: RE: Testing H745 Regulators
>
> Any chance you have a second supply you can parallel with the
Any chance you have a second supply you can parallel with the one you're using?
Some bench supplies are dual supplies and have a parallel mode so you can
benefit from both sides of the supply and they can track the same voltage. Or
just put two supplies in parallel with the same voltage set on b
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