<div dir="auto">Unfortunately, there seems to be no mention of a fuse.</div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Feb 16, 2020, 9:46 AM Richie Burnett, <<a href="mailto:rburnett@richieburnett.co.uk">rburnett@richieburnett.co.uk</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Usually the rating label tells you what fuse to fit?<br>
<br>
-Richie,<br>
<br>
<br>
<br>
-----Original Message----- <br>
From: ColinMuirDorward<br>
Sent: Sunday, February 16, 2020 2:43 PM<br>
To: Richie Burnett<br>
Cc: *SYNTH DIY<br>
Subject: Re: [sdiy] blowing fuses<br>
<br>
<br>
Thanks Richie.<br>
I should have mentioned, it's a transformer/linear supply.<br>
Not only us it eating fuses for breakfast, but dinner, too. In a couple <br>
hours, I'll be able to test lunch.<br>
So I suppose there is some faulty (or non-existant) inrush current <br>
protector, and it's costing me one fuse to charge up whatever is sucking <br>
those amps?<br>
<br>
<br>
<br>
On Sun, Feb 16, 2020 at 12:36 PM Richie Burnett <br>
<<a href="mailto:rburnett@richieburnett.co.uk" target="_blank" rel="noreferrer">rburnett@richieburnett.co.uk</a>> wrote:<br>
If it's a SMPS the inrush current at turn-on will probably eat quick-blow<br>
fuses for breakfast.<br>
<br>
-Richie,<br>
<br>
<br>
<br>
-----Original Message----- <br>
From: ColinMuirDorward<br>
Sent: Sunday, February 16, 2020 2:21 PM<br>
To: *SYNTH DIY<br>
Subject: [sdiy] blowing fuses<br>
<br>
<br>
Maybe someone has some suggestions for me.<br>
<br>
I'm blowing fuses on my "industrial" power supply. This is a salvaged<br>
+/-15v, 3a supply housed in a rugged metal enclosure. I've wired it up with<br>
a fuse on the AC mains side, and fuses on the +/-15v side. The AC/mains fuse<br>
is giving me grief.<br>
<br>
Step1) I can turn the unit on, and everything is fine. My synth is only<br>
drawing 1/2 an amp (or nothing when disconnected).<br>
Step2) Turn the unit off. At this point, I can remove the mains fuse, and<br>
test it: yes, still good.<br>
Step3) Re-install fuse, switch on. Nothing. Remove fuse and test again, now<br>
it's blown.<br>
Step4) Install new fuse. Go to Step1)<br>
<br>
I haven't used the PSU much yet, but I've powered it on and off loads of<br>
times and this problem never manifested till now. The fuses are 2amp, 250v,<br>
which I think is fine, but here is maybe my mistake: they are quick blow<br>
type. I'm uncertain, though. Wondering if I need to try to find a fault in<br>
the PSU, or just order the new fuses. But why didn't those quick blow fuses<br>
break before?<br>
<br>
Thanks for reading!<br>
Colin<br>
<br>
<br>
-- <br>
<br>
<a href="https://www.instagram.com/colinmuirdorward/" rel="noreferrer noreferrer" target="_blank">https://www.instagram.com/colinmuirdorward/</a><br>
-<br>
<br>
<a href="https://www.instagram.com/ssdp_synthesis/" rel="noreferrer noreferrer" target="_blank">https://www.instagram.com/ssdp_synthesis/</a><br>
<br>
Virus-free. <a href="http://www.avg.com" rel="noreferrer noreferrer" target="_blank">www.avg.com</a><br>
<br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
Synth-diy mailing list<br>
<a href="mailto:Synth-diy@synth-diy.org" target="_blank" rel="noreferrer">Synth-diy@synth-diy.org</a><br>
<a href="http://synth-diy.org/mailman/listinfo/synth-diy" rel="noreferrer noreferrer" target="_blank">http://synth-diy.org/mailman/listinfo/synth-diy</a><br>
<br>
<br>
<br>
<br>
-- <br>
<br>
<a href="https://www.instagram.com/colinmuirdorward/" rel="noreferrer noreferrer" target="_blank">https://www.instagram.com/colinmuirdorward/</a><br>
-<br>
<br>
<a href="https://www.instagram.com/ssdp_synthesis/" rel="noreferrer noreferrer" target="_blank">https://www.instagram.com/ssdp_synthesis/</a><br>
<br>
Virus-free. <a href="http://www.avg.com" rel="noreferrer noreferrer" target="_blank">www.avg.com</a> <br>
<br>
</blockquote></div>