[Elecraft] K3 6m pre-amp

[John Klewer]

To enhance the 6 meter performance of my K3 I built the U310 
preamplifier as described on N6CA's website:

http://www.ham-radio.com/n6ca/50MHz/50appnotes/U310.html

Tuned up on an HP8970A noise figure meter it gives 11.2 dB gain and 
NF=1.3 dB.

The receiver's performance on weak signals was significantly improved. I 
already had the parts but cost should not exceed $30.00 to duplicate 
this preamp....hard to beat.

I have not done measurements on the radio/preamp combination to 
determine any negative effect on the receiver performance but the K3, 
which always performed well in the presence of strong signals, continues 
to do so.


John, N6AX

K3 #567