[Elecraft] K3 Assembly Step

[wayne burdick]

Q3 is the external relay keying transistor, typically used to key an 
amplifier. It is operated as a saturated switch, and has extremely low 
"on" resistance, so it dissipates little power. We use a virtually 
identical device in the KPA100 (K2/100 amplifier option).

73,
Wayne
N6KR


On Sep 12, 2007, at 7:54 AM, Roy Morris wrote:

> It appears that Q3 is heat sinked directly to the PC board on page 13. 
>  Is this correct?  Roy Morris  W4WFB
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