[Elecraft] K3 Voltage drop

[Joel Black]

Ron,

I didn't think to look at that last night, but I am testing it now into 
a dummy load at 50W.  I am using an MFJ-4125 with about 18" of #10 "zip 
cord."  This goes to a PowerPole DC distribution panel and there is 
another run of about 30" of #10 to the K3.  On receive, I have 13.4 - 
13.5VDC (1.15 - 1.16A).  On transmit, it drops to 12.4 - 12.5VDC 
(~14.5A).  The wires are not even remotely warm.

I do not have time to test with my Astron RS-35A at the moment, but I 
will when I get home this afternoon.  I also have an Astron RS-20A I can 
experiment with.

Joel - W4JBB

On 2/25/2012 5:55 PM, Ron W3ZV wrote:
> Okay, confession time. My VFO B display area rarely displays anything but frequency. Doing the NAQP RTTY today, I had a brief attack of curiosity. Wanted to see how the PA temperature was doing. On the way I passed the voltage display and stopped for some reason. Noted that the voltage on RX was 13.6. Dropped to 12.6 with 75 watts RTTY TX. Supplied power cord to an Astron RS-35M. I am concerned that the drop may be excessive. I'd like to make sure that there is a problem before I start tearing into things. Cause for concern?
>
> Ron W3ZV
> ______________________________________________________________
> 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
>