Re: [Bulk] K2: Is there an ideal power supply voltage?

Posted by Bill Coleman-2 on Jan 01, 2011; 2:22pm
URL: http://elecraft.85.s1.nabble.com/K2-Is-there-an-ideal-power-supply-voltage-tp5883081p5883407.html


On Dec 31, 2010, at 5:28 PM, Andrew Moore wrote:

> While the K2 is capable of operating from a range of input voltages, is
> there an ideal power supply voltage it prefers to see for best receiver
> performance? If so, what is that voltage (as indicated on the K2 LCD when
> "DISPLAY" is pressed twice)?

Because the receiver works off an internally regulated voltage, it's performance is largely unaffected by the supply voltage, so long as it meets the minimum voltage requirements. (About 11 volts, if my memory serves).

> Would the K2's receiver performance benefit from a realignment (filters/BFO,
> IF, 4.0 MHz oscillator, etc.) after the power supply voltage is change? (as
> impractical as that may be in real life)

Highly unlikely that anything would change.

--

The transmitter, however, especially with the KPA100, is affected by supply voltage, since the finals are directly connected to the power supply.

I run my PS at 14.4 volts, which is well within the supply range (and not untypical for a automobile supply). The higher voltage helps to prevent too much sag under load. I see about 13.5 volts at full output (110 watts).

Bill Coleman, AA4LR, PP-ASEL        Mail: [hidden email]
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within a thousand years will man ever fly!"
            -- Wilbur Wright, 1901

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