[Elecraft] K3 - Power cable voltage drop

[Vic Rosenthal]

I have a Fluke DVM also. I gulped when I bought it some 30+ years ago, but it was a good decision. It’s like a Snap-On wrench. It just feels right and never let me down.

Victor 4X6GP 

> On 25 Dec 2019, at 4:29, hawley, charles j jr <c-hawley at illinois.edu> wrote:
> 
> I have a Fluke 87...for a couple of decades now. It does it all well.
> 
> Chuck Jack Hawley 
> KE9UW
> 
> Sent from my iPhone, cjack 
> 
>> On Dec 23, 2019, at 10:31 PM, Bob McGraw K4TAX <rmcgraw at blomand.net> wrote:
>> 
>> A good, known accurate DVM is an asset to any station.  Use it to determine if the others are accurate.  There are several good brands available.   A DVM that is not accurate is worse than no DVM at all.   
>> 
>> My choice of many years ago is my Fluke 77.   After I tapped it with too much voltage, I sent it to Fluke for repair and calibration.  I am confident when I make a measurement it is accurate without question. 
>> 
>> Bob, K4TAX
>> 
>> 
>> Sent from my iPhone
>> 
>>>> On Dec 23, 2019, at 2:12 PM, Buck <radiok4ia at gmail.com> wrote:
>>> 
>>> 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
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:Elecraft at mailman.qth.net
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> Message delivered to radiok4ia at gmail.com
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:Elecraft at mailman.qth.net
>>> 
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to rmcgraw at blomand.net 
>> 
>> 
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>> 
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to c-hawley at illinois.edu
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to k2vco.vic at gmail.com