Elecraft

Version 1.0.3 of K3 filter Tools

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Mike KS7D

Version 1.0.3 of K3 filter Tools

I have uploaded Version 1.0.3 of K3 Filter Tools to my web site*: http://www.ks7d.com It includes a bug fix and adds some enhancements:

Bug fix:

· Fixed Quick Test procedure in dBV Linear Range so that Reset K3 works properly at end of process to reset K3 to its state prior to running Quick Test procedure.

Enhancements:

· Added receiver sensitivity (MDS) testing function to allow user to determine minimum discernable signal capability of their K3 and compare it with Elecraft's specifications (-136 dBm with preamp on, 500 Hz bandwidth in CW mode). All that is required to run the test is an Elecraft XG1 or XG2;

· Added a Tutorial Help file to supplement the main Help file. It takes the user step by step through the dBV Linear Range and the Filter Sweep procedures;

· Added Browse Buttons to the Help files to make navigation easier;

· Number formats have been included for frequency and dBV data appearing in the results list boxes. dBV is formatted as xx.x and frequency is formatted as xxxxx.xxx.

The next major enhancement will be the capability to run filter sweeps for the crystal filters installed in the sub-receiver, KRX3.

Technical Information:

Effect of Pitch on Filter Measurements: We made a number of filter sweep test runs at various Pitch settings to determine what effect the Pitch setting has on filter measurement results. We found that when running a filter sweep in CW mode the Pitch setting has a significant effect on the filter measurements. We recommend users set their Pitch to 800 Hz which is the maximum available value in the K3. Please see the article Effect of Pitch on Filter Measurements at: http://www.ks7d.com/EffectofPitch.htm for more details.
Effect of Mode on Filter Measurements: We have found the best filter sweep test results for CW filters will be had if you use Data A mode rather than CW mode when testing your CW filters. Please see the article Effect of Mode on Filter Measurements at: http://www.ks7d.com/EffectofMode.htm for details.

* Note this is a new web site. It replaces http://mysite.verizon.net/ks7d.

Mike, KS7D

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