[sdiy] Powering 4ms pod

[Chromatest J. Pantsmaker]

A resistor across the leads perhaps?

On Tue, Nov 1, 2022 at 1:25 PM Didier Leplae via Synth-diy <
synth-diy at synth-diy.org> wrote:

> Hmm, that’s interesting. I’ll think if there’s some way I can do that. I
> have very limited equipment with me
>
> On Nov 1, 2022, at 8:17 PM, Mike Bryant <mbryant at futurehorizons.com>
> wrote:
>
> 
> Yes that fits.  Can you put a bit more load on it ?  A laptop in parallel
> perhaps ?
> ------------------------------
> *From:* Didier Leplae <didierleplae at yahoo.com>
> *Sent:* 01 November 2022 20:08
> *To:* Mike Bryant <mbryant at futurehorizons.com>
> *Cc:* Gerry Murray <synthimuse at gmail.com>; Synth-diy at synth-diy.org <
> Synth-diy at synth-diy.org>
> *Subject:* Re: [sdiy] Powering 4ms pod
>
> I’d say the time interval is almost exactly 1 sec
>
> On Nov 1, 2022, at 7:38 PM, Mike Bryant <mbryant at futurehorizons.com>
> wrote:
>
> 
> Pure guess but some laptop supplies require a minimum current draw.  If
> not, they power up, find there isn't enough draw then turn off and try
> again.  What time interval are we talking about ?
>
>
> ------------------------------
> *From:* Synth-diy <synth-diy-bounces at synth-diy.org> on behalf of Didier
> Leplae via Synth-diy <synth-diy at synth-diy.org>
> *Sent:* 01 November 2022 18:48
> *To:* Gerry Murray <synthimuse at gmail.com>
> *Cc:* Synth-diy at synth-diy.org <Synth-diy at synth-diy.org>
> *Subject:* Re: [sdiy] Powering 4ms pod
>
> I did check contact between the leads on the back of the tip and the
> contacts where the power jack are soldered inside the 4ms pod with my
> multimeter continuity setting and it seems to be making a connection. Maybe
> the 0.4mm difference is negligible?
> Also, the on and off isn’t random like a bad connection, but very regular.
>
> Does this “motor boating” idea make sense? It is a 90w power supply and
> the 4ms requires minimum 20w
>
>
> > On Nov 1, 2022, at 4:42 PM, Gerry Murray via Synth-diy <
> synth-diy at synth-diy.org> wrote:
> >
> > Assuming you're able to get the plug to make a temporary contact, it
> could be the supply is underrated for the turn-on surge of the 4mS pod.
> > Seems like it might be 'motor boating'.
> > Power comes on, post-regulator caps draw current, external supply
> collapses, regulator turns off, supply recovers. Repeat.
> > Just a possibility.
> > Gerry
> >
> >> On 01/11/2022 16:28, Neil Johnson via Synth-diy wrote:
> >> HI,
> >>
> >> Didier Leplaewrote:
> >>> I went to a local electronics store and bought a sort of universal
> supply. (The brand is “Classic” and model# PSE50249)
> >>>  It has a tip which seems to fit, but says it is “5.5/2.5mm, 12mm”.
> >>> When I plug it in to the 4ms pod, the power flashes on and off, every
> second or so, even with no modules or ribbon cables attached.
> >>> Testing the supply with a voltmeter, it is indeed positive tip and
> around 19.5V.
> >> Is it something like this:
> >>
> https://www.csi-elektronik.de/PSE50249-EU-Universal-Netzteil-90W-11-ADAPTER-185-20V-45A-90W-C6
> >>
> >> If so choose the correct tip as Steve suggested.
> >>
> >> Neil
> >>
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