[Elecraft] Voltage drop in DX Power to K3

[Bob McGraw K4TAX]

Oh well, I need another cup of coffee.    I'll try to do better proof 
reading.  Can't blame that one on auto-correct!

Cutting to the chase........., measure from the power supply POS 
terminal to the ACC 12V on the K3 radio.    That is the total voltage 
drop in the POS DC path.  Then do the same for the NEG terminal of the 
power supply to the ground terminal on the radio. That is the voltage 
drop on the NEG DC path.  Add those two together and one has the total 
voltage drop.  Now, step by step, isolate where each amount of voltage 
drop occurs.

Anytime over 0.5 volts total voltage drop occurs, something needs 
attention.   Thus DC Pos should be less than 0.25 volt drop and DC Neg 
should be less than 0.25 volts.  For a total of 0.5 volts drop at the 
radio.

73

Bob, K4TAX


On 4/26/2020 11:22 AM, Adrian wrote:
> I got a good chuckle out of that one Bob, happens to me often
>
>
> take 2 >
> The calculation is simple:    E = I x R      current multiplied by 
> resistance equals the voltage.
>
>
>>
>> The calculation is simple:    E = I x R      current multiplied by 
>> amps equal voltage.
>>
>> 73
>>
>> Bob, K4TAX
>>
>>
>