How about this, guys?
I have always been under the impression that my signal was clean and the
Yaesu guys were screwing up the bands.
Ron - WA9IRV Omni 6+
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>Subject: Topband: More About Clix
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>Date: Mon, 28 Jan 2002 14:41:16 -0800
>
>Virtually all of today's modern rigs have a key click problem. The stock
>FT-1000MP and Mk V CW signal rise time is 2.4 ms and the fall time is 1.0
>ms. This is on every dit and dah. The ARRL criteria for "clean" keying
>is a rise and fall time of 5.0 ms. After the INRAD keying improvment
>mod, the rise time is 4 ms and the fall time is 2.2 ms. It certainly
>improves the keying, but not enough, which is why I'm going to do the
>W8JI key click mod on my MP.
>
>A friend has an IC-756 PRO which has clicks extending out at least +/- 1
>kHz. Another has a late-model IC-775DSP which has clicks as bad or worse
>than the FT-1000MP. Additionally, you can hear a "thump" on his first
>dit or dah when he is operating split. Earlier model 775s have the
>additional problem of generating a signal from the receive VFO when
>operating split (becoming worse as the split frequency is smaller),
>clearly an FCC violation. Icom knows about this problem because they
>will upgrade the early version if the owner complains, but they won't
>publicly confirm this problem.
>
>Many topbanders prefer the Omni VI+ because of its superior QSK and
>excellent receiver. But even it has bad clicks. INRAD has thus far
>unsuccessfully tried to develop a mod to correct this. George, W2UVG
>(owner of INRAD) told me, "I have spent many hours working on the Omni
>VI+ keying and ALC loop as it has a similar problem. The keying waveform
>out of the first mixer is text book perfect, 5 mS up and down. Then it
>goes through the ALC loop and the output has 1 mS rise time and 5 mS fall
>time. This loop has a very slow decay time, and it doesn't change the
>input shape. If I disable the ALC loop the radio puts out 100 watts and
>the keying is perfect. But there is no power control, etc."
>
>Jim, N7JW has overcome the Omni VI+ click problem by using an FT-1000MP
>with the W8JI key click mod to transmit and an Omni VI+ to receive. It
>would be nice if all hams (especially topband contesters) were as
>concerned about having a clean CW signal as N7JW is.
>
>I'm not sure how the modern Kenwood radios are as far as clicks go.
>
>73, de Earl, K6SE
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