Re: A Weight Reduction Plan....
- From: Mark Bohrer <lurchl@xxxxxxxxxxxxx>
- To: leica@xxxxxxxxxxxxx
- Date: Sun, 11 Mar 2007 12:34:17 -0700
David:
Very nice repackaging job on a bulky item. You could go into business
selling these with a slightly cleaner version, like Tom Abrahamsson
and his Rapidwinders. Just have interested customers send you their
original chargers, and send back a shrunk one - for a fee, of course!
Your shot of the innards shows a PC board with somewhat archaic
through-hole construction. Leica probably doesn't have enough demand
for a surface-mount board with a switching power supply.
Was there any special bonding of the metal heat sink fin to the
original case? If there was, you run a minor risk of overheating the
load transistor in your new case. Also, there may be a thermal
airflow problem with your cooling holes on your new case. If its top
feels warm to the touch in use, you might consider drilling some
holes there to enhance heat flow out.
Just a few thoughts from a former engineer... ;)
Mark
Mark Bohrer
Wildlife Photography on the Urban Edge
www.mountain-and-desert.com
At 11:01 AM 3/11/2007, you wrote:
Last August, the Brits foiled a plot to put explosives on some 14
planes. This resulted in an immediate and total ban on cabin
luggage for a few weeks.
They relaxed the rules, ever so slightly, just 72 hours prior to our
departing for Wetzlar/Solms, via London. The "new" cabin baggage
limits were very small, and it was a real challenge to get the
R8+DMR, a 21/4, 50/2 and 80~200/4 Vario into an 11x14x6"
(28x35x15cm) case. After all, I also needed the DMR's charger, an
Image bank with it's charger and assorted cards,filters and other
accessories! It was done, but packed for space, certainly not convenience.
I resolved to make what I could, lighter and more compact. The first
target was the DMR's charger, which is oversized for the purpose.
I have successfully put it on a diet... the revised charger employs
the same circuitry as the original, repackaged in a box that is 55%
smaller, 28% lighter and considerably more convenient.
Photos of my newly trimmed down DMR charger are at:
http://www3.telus.net/~telyt/charger.htm
I apologize for the artifacts in some of the shots... they were
downsized using a quick and dirty program which works very will for
small size changes, but not for large ones.
Cheers!
---
David Young,
Logan Lake, CANADA
Wildlife Photographs: http://www.telyt.com/
Personal Web-pages: http://www3.telus.net/~telyt
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