Re: K3 Receiver Noise Level -- Evaluation and Adjustment
Posted by
Julian, G4ILO on
Dec 20, 2009; 5:44pm
URL: http://elecraft.85.s1.nabble.com/K3-Receiver-Noise-Level-Evaluation-and-Adjustment-tp4187070p4195347.html
P.B. Christensen wrote
It appears your K3 has not yet been modified although don't expect a
complete elimination of distortion products through the K3's transformers.
The problem is not lmited to the K3: distortion produced in small, datacom
transformers is dependent on the source impedance preceding the input to the
transformer.
Yes, I have performed that modification. Perhaps elimination of the transformers would be the answer.
However what this would also suggest is that the harmonic distortion products are only present on the line output, and not when someone is listening to CW on speakers or headphones. I will have to try connecting the rear speaker or headphone output to the sound card to see if the harmonics can still be observed.