[hpsdr] Smoke from Penelope

[Vern Kollas]

Gerd,

Yes, it is just to the left of T2.  I also got out my DMM to do some voltage checks on LPU before I power any of the boards back up.   I do have a good solid 13.8V DC out of my power supply and all other rigs are working FB.  I can say that the Mercury/Ozy combo is also working just fine, but I will double check the voltages to be sure. Hopefully nothing else is harmed other than that cap.

Looks like it might be time for a digikey order..  :-)


Thanks to all who have replied so far.  

73!

Vern -- KC8YOH



________________________________
From: Gerd Loch <g.loch at nt-electronics.de>
To: hpsdr at lists.openhpsdr.org
Cc: spoonman1227 at yahoo.com
Sent: Fri, October 9, 2009 5:54:50 PM
Subject: Smoke from Penelope

Hi Vern,

ist his the capacitor C4 left of T2?
If yes, this is a tantal capacitor. Tantal capacitors are a weak point in
circuits and I avoid them as far as possible. I have assembled a ceramic
capacitor on my Penelopes for C4.
You will have to replace this capacitor and I recommend to no more powering
this board. You risk to burn traces on the board.

73, Gerd
DJ8AY


Message: 12
Date: Fri, 9 Oct 2009 12:51:09 -0700 (PDT)
From: Vern Kollas <spoonman1227 at yahoo.com>
To: hpsdr at lists.openhpsdr.org
Subject: [hpsdr] Penelope -- Letting the smoke out...
Message-ID: <716445.96693.qm at web54205.mail.re2.yahoo.com>
Content-Type: text/plain; charset="iso-8859-1"

Greetings all..

So... I decided it was time to get both my Mercury and Penelope updated with
the latest firmwares....? Mercury went fine as always.? However, when I
powered up Penelope, she started smoking...? :-(

I have powered her up a few times before without any issues, but since I am
still waiting on Alex/Pennywhistle, I haven't had her installed in Pandora.?
After a little investigation, C4? (located right up next to T2) is the
culprit.? Any ideas what might be shorting out this cap??? If I plug it back
in, it just smokes some more.... No other parts seem to be hot or anything
like that.? Otherwise, nothing else has changed since I last had it powered
on.

Any ideas of what I should check first??? 

Thanks in advance and 73!!

Vern -- KC8YOH


*****************************


      
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20091009/67b302ac/attachment-0003.htm>