K2 RF Board Part 1 - Setting AGC Threshold

[JT Croteau]

I am currently building K2 6233.

Setting AGC Threshold - Manual states to turn R1 until pin 5 on U2
reads 3.8V.  However, I can't get the voltage this high.  When I turn
R1, the voltage range is from 3.75V to 2.638V.

Anyone have any ideas?

Thanks

--
JT Croteau, N1ESE - Manchester, NH
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[Don Brown-4]

Hi

This voltage will depend on the tolerance of the 8 volt regulator. If the 8
volt supply is on the low side of the tolerance then you will not be able to
reach the 3.8 volts. However 3.75 should be close enough as this is just a
ballpark adjustment. The final adjustment will be made later by turning the
AGC on and off and adjusting for no change in the background noise.

Don Brown

KD5NDB




----- Original Message -----
From: "JT Croteau" <[hidden email]>
Subject: [Elecraft] K2 RF Board Part 1 - Setting AGC Threshold

> I am currently building K2 6233.
>
> Setting AGC Threshold - Manual states to turn R1 until pin 5 on U2
> reads 3.8V.  However, I can't get the voltage this high.  When I turn
> R1, the voltage range is from 3.75V to 2.638V.
>
> Anyone have any ideas?
>
> Thanks
>
> --  

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