[Elecraft] K2 Audio-Hi Cur-Low P signs and wonders

[kg4dni]

Hey Group,

Last night I rewound all my torroids on the base K2 after L33. Meaning every torroid from L33 to RFC3.
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I have already checked on the speaker being shorted, and my speaker audio via that check is alright.
But according to friends who have K2s; I should be getting more audio. The reality is that with AF and RF knob at MAX and Pre-Amp ON, I still have to cup the internal speaker with my hand, so that someone standing 2ft away from me can hear it.
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I had wound them with the wrong size wire. I have passed a note along to Scott to include in the new rev. of the K2 manual to denote that all torroids except for L33 should be wound with #26 AWG wire (red and/or green)and L33 is the ONLY torroid to be wound with #28 AWG wire.

So this is what I need to do to get more audio and at the same time figure out why I keep getting HI Cur warnings. (Which Scott explained to me over the phone.)

1. Rewind all torroids in the Low-Pass Filter area of the board.
2. Do the VCO Linerization according to the pamphlet that came with the K2 Firmware REv. 2 chip. And not according to the book on I believe page 60.
3. Go back to the book and do the IF Amp alignment, etc.

But ONE thing on the CTRL board that stumps my thoughts is the LM380N-8 AF Amp(audio).  The VAC going in to the IN1 and IN2 are higher than the OUT line. Why is it that way??? I thought that if it is an amp that it is supposed to increase the voltage going out.  And what does 'N-8' signify for the part name "LM380N-8"??


Daniel
kg4dni 

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