[1000mp] Key clicks

[Pete Smith]

At 07:00 AM 1/2/03 -0500, John L Merrill wrote:
>This is from the expanded Mk5 Field ARRL review. The graphs, which I cannot
>show you in plain text mode show cw sidebands down 60db 3khz either side of
>center freq. The 756 pro did a little better at 70db down.

Assuming the ARRL's test is sound, it seems to me that it is critical to 
know, under the same test conditions, how the various modifications 
perform.  I was amused to read, in both the MP and Mark 5 expanded reports, 
the judgment that "this radio has excellent keying characteristics," 
although the spectrum analyzer test was apparently not done.  No such 
judgment appears in the Field report, nor is there anything critical said.

The test conditions in the Field report seem to be specified in sufficient 
detail to duplicate them for other radios in the MP series, stock and 
modified, and for other radios in the same class.  I'll deliver my 
unmodified Mark 5, if someone nearby (DC/Philadelphia area) wants to do the 
test, and will arrange to put the spectrum analyzer traces on the 
web.  Who'll do the same with other radios?

73, Pete N4ZR
Happy Holidays