[Elecraft] Highest power supply voltage for K2?

[Jessie Oberreuter]

      If the airplane batteries are clearly superior in performance, you 
should consider making a pack of them that meet the voltage requirements 
of your camera.  In almost every circumstance, the excess voltage is being 
dissipated as heat and/or causing more direct damage.


On Tue, 30 Nov 2004, W3FPR - Don Wilhelm wrote:

> Dan,
>
> You method will work in some cases, but can result in component damage in 
> others - there is no one answer, it depends on the device and its design.  I 
> personally wouldn't try that with my digital camera (it is not a throw-away 
> expense to replace it).
>
> Far better to use a regulator or even a string of diodes to bring the voltage 
> to something less than the max specified for the device in question.
>
> 73,
> Don W3FPR
>
> ----- Original Message ----- From: "Dan Barker" <dbarker at visioncomm.net>
> To: "Elecraft" <elecraft at mailman.qth.net>
> Sent: Tuesday, November 30, 2004 8:29 AM
> Subject: RE: [Elecraft] Highest power supply voltage for K2?
>
>
>> I've always done the following to see if I was going to toast something.
>> Maybe someone can tell me the error of may ways (the last thing I did this
>> on was a $1,400 Video Camera - if the method is dangerous, I'll stop!).
>> 
>> I hook the 6V Camera up to a 6V power supply (actually a variable voltage
>> PS) through an ammeter. I slowly advance the voltage (toward the 9.6V 
>> target
>> of the high-capacity batteries stolen from my Electric Zagi model 
>> airplane).
>> 
>> I figure if the current goes up, I'm going to cook something. If the 
>> current
>> decreases, then the power being dissipated is roughly constant so I'm not
>> cooking anything.
>> 
>> If I'm WAY off in left field, let me know. I'll spring for the $60 camera
>> batteries that don't last worth a poop instead of the [already on hand]
>> airplane batteries that hold up nicely.
>> 
>> If I'm NOT off in left field, this is a nice way to check out a circuit
>> without a diagram or any disassembly/tracing.
>> 
>> Dan / WG4S / K2 #2456
>> 
>> I a message dated 30/11/04 02:01:23 GMT Standard Time, althoff at verizon.net
>> writes:
>> 
>> <snip>
>> What is  the absolute highest safe voltage you can pump into the K2 before
>> you start  overheating the regulators etc?
>> </snip>
>> 
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>
>
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