[UK-CONTEST] Key Clicks.

[Mark Marsden]

Hi Alex

It all depends on the receiver bandwidth. If a CW signal is 20kHz wide
and received at its "centre" frequency with a receiver bandwidth of
500Hz, the demodulated signal will have a rise time of 1/500 sec or 2ms.
Then the clicks will not be observed, hence T9. 

The clicks become apparent as the receiver is tuned off frequency and if
the receiver bandwidth is increased.

73 Mark G4AXX

-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com] On Behalf Of Alex GM3ZBE
Sent: 25 November 2009 17:20
To: uk-contest at contesting.com
Subject: Re: [UK-CONTEST] Key Clicks.

Is a signal with clicks a "T9" signal?
Alex

Roger G3SXW wrote:
> Surely it's 599K (or 599C).
> 73 de Roger/G3SXW.
>
>
> ----- Original Message ----- From: "Alex GM3ZBE"
<alex at gm3zbe.plus.com>
> Cc: <uk-contest at contesting.com>
> Sent: Wednesday, November 25, 2009 2:42 PM
> Subject: Re: [UK-CONTEST] Key Clicks.
>
>
>> Hi
>> I'm inclined to agree with you about the reasons for the response
Jim.
>>
>> So K = Clicks?  If I receive 59K that means I am R5, S9 and have key 
>> clicks?
>>
>> Actually I think Yaesu have some responsibility.  For an  extended
>> period, they carried on producing FT1000 series models with known key
>> click problems and never seemed to do much about the design flaw.
>> Alex

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