[1000mp] Key clicks

Thu, 2 Jan 2003 13:29:35 -0500

If it would be helpful, I could arrange for the ARRL Lab to test a =
modified radio.  I wonder if W8JI could send his here. :-)

73,=20
Ed Hare, W1RFI
ARRL Lab
225 Main St
Newington, CT 06111
Tel: 860-594-0318
Internet: [email protected]
Web: http://www.arrl.org/tis

> -----Original Message-----
> From: Pete Smith [mailto:[email protected]]
> Sent: Thursday, January 02, 2003 7:50 AM
> To: [email protected]
> Subject: Re: [1000mp] Key clicks
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> At 07:00 AM 1/2/03 -0500, John L Merrill wrote:
> >This is from the expanded Mk5 Field ARRL review. The graphs,=20
> which I cannot
> >show you in plain text mode show cw sidebands down 60db 3khz=20
> either side of
> >center freq. The 756 pro did a little better at 70db down.
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> Assuming the ARRL's test is sound, it seems to me that it is=20
> critical to=20
> know, under the same test conditions, how the various modifications=20
> perform.  I was amused to read, in both the MP and Mark 5=20
> expanded reports,=20
> the judgment that "this radio has excellent keying characteristics,"=20
> although the spectrum analyzer test was apparently not done.  No such=20
> judgment appears in the Field report, nor is there anything=20
> critical said.
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> The test conditions in the Field report seem to be specified=20
> in sufficient=20
> detail to duplicate them for other radios in the MP series, stock and=20
> modified, and for other radios in the same class.  I'll deliver my=20
> unmodified Mark 5, if someone nearby (DC/Philadelphia area)=20
> wants to do the=20
> test, and will arrange to put the spectrum analyzer traces on the=20
> web.  Who'll do the same with other radios?
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> 73, Pete N4ZR
> Happy Holidays
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