[Elecraft] K3 output buffer modification

[James Sarte]

Hmm... just out of curiosity, couldn't I measure the IF output using the XG2
signal generator set to 50uV?  How strong does the signal have to be?

I'll go ahead and check the junction voltage at R9 as you suggested.

Mni tnx!
James K2QI


-----Original Message-----
From: Alan Bloom [mailto:alan at elecraft.com] 
Sent: Wednesday, January 06, 2010 4:44 PM
To: James Sarte
Cc: Elecraft
Subject: Re: [Elecraft] K3 output buffer modification

Unfortunately you won't be able to measure an RF signal at the IF output
connector with a meter or oscilloscope unless you have a REALLY strong
signal at the K3 antenna input.

As a general sanity check, you could do a DC voltage measurement on the
JFET just to make sure it is still drawing current.  I don't know the
exact voltage, but I imagine you should get a volt or two on the JFET
source (R9 source resistor).  That does require taking the bottom panel
off the K3 again.

Alan N1AL