[Elecraft] RE: K2 Study

[James T. "Jim" Rogers, W4ATK]

	I had the opportunity to have two K2s sit side by side on the lab bench
yesterday and today. It was too good an opportunity to pass up. With just
two samples though, there is just not enough data to smooth out the
"wrinkles". So if any of you might have the desire to contribute data to
this project, the results will be shared with all. Here is what is needed.

Test Point/Band	160	80	40	30	20	17	15	12	10
TP1			xxx	xxx	___	xxx	xxx	xxx	xxx	xxx	xxx
TP2			xxx	xxx	___	xxx	xxx	xxx	xxx	xxx	xxx
TP3			xxx	xxx	___	xxx	xxx	xxx	xxx	xxx	xxx
U10-4			xxx	xxx	___	xxx	xxx	xxx	xxx	xxx	xxx
U9-6			xxx	xxx	___	xxx	xxx	xxx	xxx	xxx	xxx
R5			___	___	___	___	___	___	___	___	___
W6			___	___	___	___	___	___	___	___	___
D1 anode		___	___	___	___	___	___	___	___	___
Q5 Case		___	___	___	___	___	___	___	___	___
Q6 Base		___	___	___	___	___	___	___	___	___
Q6 Collector	___	___	___	___	___	___	___	___	___
Q7 Base		___	___	___	___	___	___	___	___	___
Q8 Base		___	___	___	___	___	___	___	___	___
***********************************************************************
WARNING - skip this step if you are using an rf probe. The voltages
present could and would probably damage your probe. (> 10VACrms)
Q7/Q8 Collector	___	___	___	___	___	___	___	___	___
***********************************************************************
D9 is located in the vicinity of the noise blanker socket, as a matter
of fact if you have the noise blanker you will have to remove it to get
to D9. voltages present here are < .5VAC
D9 anode		___	___	___	___	___	___	___	___	___

Please indicate whether your measurements are ACV P-P (with a scope using a
10X probe) or VACrms as with your rf probe.
All information will be fed into an Excel spreadsheet that will calculate
stage gains, filter insertion loss etc. The more data the smoother the plots
will be. It takes about 30 minutes to gather the information.

If you don't mind include your serial number. This will help in evaluating
the data.

I would encourage everyone to gather this data on their K2 whether you pass
the information along or not. I wish that I had when I first built the unit.
The information would have been invaluable during some recent
trouble-shooting.

73s Jim, W4ATK