[ARC5] 1625 and Key Clicks.

[Jim Wiley]

I seem to remember that one of the "standard" test words for determining 
code sending speed is the word "paris". If this is correct , then how 
many times a person can send "paris" in one minute is equal tocode speed 
in words per minute.   Perhaps some on this list has better information.

- Jim, KL7CC



On 7/11/2017 3:51 PM, Bob kb8tq wrote:
> Hi
>
>
>> On Jul 11, 2017, at 7:42 PM, Kenneth G. Gordon <kgordon2006 at frontier.com> wrote:
>>
>> On 11 Jul 2017 at 16:21, Bob kb8tq wrote:
>>
>>> Hi
>>>
>>> Time constant - how fast do you normally send?
>> Around 30 WPM, most of the time. Sometimes a bit slower. There are a group of guys
>> centered around 30 kHz up from the bottom of 40 and 20 who bang along at speeds up to
>> 100 wpm. Some of their signals have very noticable clicks.
>>
>>> 10 WPM is 50 characters per minute or about one a second. With normal
>>> spacing, you are at a character in a second.
>>>
>>> If you send a series of numbers, you have about 20 elements per second. Normal
>>> letters will be a bit less.
>>>
>>> For reasonable "fidelity" you want a time constant / filter that will pass the 5th harmonic
>>> of your keying "square wave". That gets you to about 100 Hz or so.
>>>
>>> This all scales with keying speed. If you normally send at 100 WPM, 100Hz becomes 1KHz.
>>> None of it is exact. You could go to "3rd harmonic" and cut them 2:1. ...You could go to the
>>> 9th harmonic and double the targets. It still works either way.
>>>
>>> Bob
>> Thank you for that above, Bob. I'll file it in my file on keying methods.
> No problem. I happen to be a fan of grid keying rather than cathode keying. It *does* take a separate bias
> supply but it makes click filters much easier …
>
> Have fun !!
>
> Bob
> KB8TQ
>
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