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Elecraft K2 and K3 Transceivers
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Prior Products - no longer available
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Software Updates

I've placed links to documents related to Clifton Laboratories kits and papers on this page. All are in PDF format.

Current Kits

• Z10000B-U covers the broadband or "universal" version of the Z10000B buffer amplifier

• Z10000B-K2 covers the buffer amplifier version with frequency shaping parts specific for Elecraft's K2 transceiver

• Z10000B-K2 Installation covers installing the Z10000B inside an Elecraft K2 transceiver.

• Z10010 4.915 MHz Filter Operating Instructions for the K2 IF bandpass filter. Updated 07 October 2006.

• Z10040A Norton Amplifier Assembly and Operating Manual. [The Z10040A has been replaced by the Z10040B Norton Amplifier. The Z10040A manual is provided for historical reference purposes.] This is a 4 MB download.

• Z10040B Norton Amplifier Assembly and Operating Manual. Updated periodically. This is a 4.5 MB download.

• Z1203A DC Power Coupler Assembly and Operating Manual. This is a 3.7 MB download.

Note: The following two manuals relate to the Z10000 buffer amplifier original PCB version. Since the circuit and performance of the current Z10000B is identical with the Z10000, I've  retained the Z10000 documentation as it is of continuing interest.

• Z10000-K2 and Z10000-U buffer amplifier manual is now posted. Version 3.2, updated 04 January 2009 and should be the final version, absent some small corrections. This is a 2 Mb PDF file. The second run (2008) Addendum is available by clicking here. The Addendum material has been incorporated into the main manual in version 3.2.

• Z10000-U Mini-Manual is now available. This is a shortened (15 pages) edition of the full Z10000 manual, pared down to minimalist form.
   

Not Related to Any Specific Kit

• Crystal Motional Parameters. This is not a polished, ready-for-publishing article, but is more of a summary of my workshop notes, with photos and plots. It describes the results of a variety of approaches to measuring quartz crystal motional parameters, with results compared against a Saunders & Associates Reference Crystal.

• Elecraft K3 AGC Parameters and S-Meter. A reformatted version of my page Elecraft K3 AGC and S-Meter is now available in a format optimized for print and with higher resolution graphics.

• Elecraft K2 Transceiver Response in SSB Mode to Tone Burst. To see how my K2 reacts to a tone burst, I ran a test at varying audio levels on 7 MHz in LSB mode. This is far from an exhaustive test, and it shows a relatively small degree of overshoot and level oscillation.

Retired Kits No Longer Available

• Z90 Digital Panadapter Operating Instructions

• Assembly Instructions for the Z90 & Z91. This is a 2.2 MB file, with reduced graphics resolution. The current edition is 2.0, revised 19 Oct 2006.

• Corrections and Updates to the Assembly Instructions. The most recent errata to the printed Assembly Instructions.

• Component Placement shows where each component is placed via an XY grid system with an index to schematic part identifiers.

• Z90 & Z91 Schematic 

• Z90 & Z91 Annotated Schematic for troubleshooting.

• Updating the Z90 Firmware describes the MicroLoader and procedure for flashing new firmware in the Z90's PIC18F4620 microcontroller.

• Assembly and Usage Notes for Crystal Test Fixture, Contains the assembly and checkout information for my crystal test fixture kit.

• Filter Grounding Comparison provides measurements of the Z90 in both 200 and 1000 Hz RBW modes for three alternative crystal grounding configurations. In the case of the Z90, no significant difference is seen between top bus grounding and individual bottom crystal grounding.

• Z100 Operating Manual. A PDF copy of the Z100 CW tuning aid manual.

• Z100 Schematic. PDF copy of the schematic. (The Z100's firmware source code is available on the Software page).

• Z100 Programming Cable (RS232 to logic level). A simple home brew adapter cable for those not wishing to purchase the recommended

• TTL232R cable.