Re: Voltage drop in DX Power to K3

Posted by N4ZR on Apr 26, 2020; 4:21pm
URL: http://elecraft.85.s1.nabble.com/Voltage-drop-in-DX-Power-to-K3-tp7660188p7660192.html

Approximately .3 volts with a cable about a foot long.

73, Pete N4ZR
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On 4/26/2020 11:08 AM, David Herring wrote:

> I’m late in coming to this thread, so sorry if I missed the answer to this question, but what is the voltage drop between the power supply and the 4005i?
>
> 73, David N5DCH
>
>> On Apr 26, 2020, at 8:46 AM, N4ZR <[hidden email]> wrote:
>>
>> I've had an e-mail exchange with West Mountain Radio.  Measured the voltage drop inside the 4005i at only .08 volts at 100 watts key down.  My power cable from the 4500i to the K3 measures 0.3 ohms on each conductor, which at 20 amps should only yield a 1.2 volt drop, right?  I don't know where the other volt plus of drop is coming from.  The cable is 40 inches long, and only minor shortening is possible.  It is about the largest wire that will fit in the Powerpoles on both the K3 and the 4005i.
>>
>> Suggestions welcome
>>
>> --
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
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