[1000mp] Inrad Keying Mod

Thu, 08 Jan 2004 17:45:02 +0000

I have an original MP and a Mk V Field.  Both clicked seriously in their 
unmodified state.  The clicks from my MP were noticeably worse than from 
the Field.  I added the W8JI mod to both radios.  This was extremely 
effective with the original MP, where I achieved a very deep null 
leaving the rig as clean as a whistle.  With the Field, I was also 
successful in reducing the clicks significantly compared to its unmodded 
state but nowhere near as successful as with the standard MP.  I didn't 
bother to spend time to determine why it was less effective in the Field 
as what the mod achieved was adequate in my view.

73  Bob, 5B4AGN, P3F

Scott Manthe wrote:

>A comparison of the CW waveforms in the QST reviews of the MP, Mark V and
>the Field would indicate that Yaesu did make some improvements to the keying
>circuitry in the Field. In the Field, the risetime of the first character is
>obviously longer and the waveforms of the characters are more symmetrical.
>Whether these improvements are enough to fully eliminate the keyclicks is
>another story, but Yaesu DID make changes.
>
>73,
>Scott
>
>----- 
>From: "Barry N1EU" <[email protected]>
>To: <[email protected]>
>Sent: Thursday, January 08, 2004 8:21 AM
>Subject: [1000mp] Inrad Keying Mod
>
>
>  
>
>>It's been generally recognized that Yaesu did NOT make keyclick
>>    
>>
>improvements
>  
>
>>in the MkV/Field.  I encourage all cw operators to install the mod, or
>>    
>>
>have
>  
>
>>it installed.  I've personally installed it in the MP and D, but not the
>>MkV.
>>
>>I have some crude, but dramatic, before and after recordings of my
>>    
>>
>modified
>  
>
>>MP,   http://www.qsl.net/n1eu/Yaesu/MPclicks.htm and also the D,
>>http://www.qsl.net/n1eu/Mods/1000Dclick.htm
>>
>>73,
>>Barry N1EU
>>
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>
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