Re: K3 - Power cable voltage drop

Posted by Buck on Dec 23, 2019; 7:59pm
URL: http://elecraft.85.s1.nabble.com/K3-Power-cable-voltage-drop-tp7657290p7657336.html

The reliable place to measure the voltage at the K3x is using the supply
voltage display meter in the radio.  I was surprised to find mine was
significantly low.  I thought it was voltage drop but changing the
supply cable didn't make much difference.

Turns out the Astron power supply was more than a volt low and the meter
on the supply had been cranked up to make it appear to be correct.  I
used two separate VOMs to set the power supply and then adjusted the
meter to make it agree.

Moral of the story: don't rely on the meter on the power supply and
assume a low reading at the radio is due solely to voltage drop.



Buck, k4ia
Honor Roll
8BDXCC
EasyWayHamBooks.com

On 12/23/2019 2:26 PM, Phil Kane wrote:

> On 12/22/2019 9:44 AM, Bob McGraw wrote:
>
>> I also added a dedicated ground between the ground screw on the back of
>> the radio to the ground screw on the power supply.
>
> That's for "bonding".  Where do you pick up "ground" - at the radio, at
> the PS, or at some other point?
>
> 73 de K2ASP - Phil Kane
> Elecraft K2/100   s/n 5402
>
>  From a Clearing in the Silicon Forest
> Beaverton (Washington County) Oregon
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