[Elecraft] [K3] Audio Output Power ??

[Joe Subich, W4TV]

The LM4950 is rated at 3.1W per channel to a 4 Ohm
load with 1% THD+N.

The spec sheet shows THD increasing significantly once
output goes above about 2.3W into 4 Ohms, above about
1.8 Watts into 8 Ohms and above about 900 mW into 16
Ohms at 12V.  THD is below 0.03% until the "knee" is
reached.  Increasing Vdd from 12 to 13.5V increases the
available output by about 25% based on the charts
included in the data sheet.

73,

    ... Joe, W4TV


On 3/15/2011 9:31 PM, Phil Hystad wrote:
> If I remember correctly, there are two different audio amplifier circuits in the K3.  One for the speaker and one for the headphones (or, it may be more complex then that).
>
> Does anyone know the power output level of the speaker audio amplifier?
>
> 73, phil, K7PEH
>
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