The power cable at 0.03 ohms on each side, a total of 0.06 ohms
resistance. The 4005i, per his measurements, has 0.08 ohms
resistance. The power distribution strip contributes more than 50% of
the voltage drop. Actually more than the power cables.
The power cable contributes 1.2 volts of drop. The 4005i contributes
an added 1.6 volts of drop for a total of 2.8 volts.
The calculation is simple: E = I x R current multiplied by amps
equal voltage.
73
Bob, K4TAX
On 4/26/2020 10:53 AM, Leroy Buller wrote:
40 inches of power cable. In my experiences, that could be an issue
depending on the gauge of the wire. I used a long cable 12 gauge and had
issues. Went to 24 inches number 10 gauge and voltage drop significantly
improved. The resustace does not have to be large to cause a voltage drop
Lee
On Sun, Apr 26, 2020, 9:47 AM N4ZR <[email protected]> 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.
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[email protected]
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to [email protected]
