[Elecraft] 80 meters

[Bob McGraw K4TAX]

Yes, I've done that.  However, since the radio draws a different amount 
of current at 100 watts CW into a 50 ohm dummy load depending on band, 
the IR drop in the DC  line will be slightly different from band to band.


73

Bob, K4TAX



On 12/31/2017 10:18 AM, donovanf at starpower.net wrote:
> Hi Bob,
>
> Rather than estimating  the loss in your power cord, your K3 has the
> capability to accurately measure and display the DC power voltage
> internal to your transceiver.
>
> Tap DISPLAY and rotate the VFO B dial to show the K3 power
> supply voltage when you're transmitting.
>
> 73
> Frank
> W3LPL
>
> ------------------------------------------------------------------------
> *From: *"Bob McGraw K4TAX" <rmcgraw at blomand.net>
> *To: *elecraft at mailman.qth.net
> *Sent: *Sunday, December 31, 2017 2:27:01 PM
> *Subject: *Re: [Elecraft] 80 meters
>
> I run my power supply at 14.0 volts as measured at the supply. This is
> done to accommodate the ~0.25 - ~0.35 volt drop in the DC line between
> the supply and the radio when in transmit.
>
> 73
>
> Bob, K4TAX
>
>
> On 12/30/2017 10:20 PM, Barthold Lichtenbelt via Elecraft wrote:
> > Make sure your power supply provides enough voltage and can handle 
> the power draw (300 watts is probably a good number). This happened to 
> me too when I accidentally adjusted the voltage of my PSU too low. I 
> now have it at 13.6V.
> >
> > Sent from Mail for Windows 10
> >
> > From: Mal Speer
> > Sent: Saturday, December 30, 2017 8:01 PM
> > To: 'Mal Speer'; elecraft at mailman.qth.net
> > Subject: Re: [Elecraft] 80 meters
> >
> > I forgot to say that the rig is a factory built K3s
> > Mal
> >
> > -----Original Message-----
> > From: elecraft-bounces at mailman.qth.net
> > [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Mal Speer
> > Sent: Saturday, December 30, 2017 9:52 PM
> > To: elecraft at mailman.qth.net
> > Subject: [Elecraft] 80 meters
> >
> > I seem to have low output on 75 phone. The most power I can put out 
> is 71
> > watts. I can turn the power knob to 100 watts, but it backs down to 71
> > immediately. This is into an antenna and a dummy load.
> >
> > I just checked 160 same thing except I get 83 watts
> >
> > All other bands seem OK
> >
> > Mal WA2TWA
> >
> >
> >
> >
> >
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