[Yaesu] FT1000MP Key click mod

[G0AFH]

Hi Peter,

Thanks. It's a FT1000MP which is what I thought the waveforms shown on
Tom's website were from. Using the pots I can change the shape of the
rising edge but it has virtually no effect on the falling edge.

73
Ian.

On 04/06/2010 19:07, Peter Sundberg wrote:
> Ian,
>
> This is what Tom W8JI says on his webpage http://www.w8ji.com/keyclick_mp.htm
>
> "I initially clipped in potentiometers, so I could listen to the output and
> adjust the clicks at 1kHz spacing. Both pots were adjusted for a null in
> click amplitude. That null is rather sharp, and turned out to be around 30
> dB deep. This takes the 1000MP from being one of the "clickiest" radios I
> have found to one of the cleanest!"
>
> Is it the 1000MP or the 1000MP MkV you have modified? As I understand it
> the MkV is different and the mod is not as efficient on this model. My MkV
> is a later model that was modified at the factory. Keying is decent, on a
> scope the rise and fall times are very similar to my FT-990. 
>
> 73 
> Peter SM2CEW
>
>
>
> At 13:31 2010-06-04 , g0afh wrote:
>   
>> Thanks Jan.
>>
>> The falling edge is definitely where the problem is. The rise time is 
>> now around 8mS but the fall is still very fast.
>>
>> Perhaps I am expecting too much from this mod.
>>
>> 73
>> Ian.
>>
>> Jan Erik Holm wrote:
>>     
>>> Even with this mod the MP clicks. It clicks at the "break" side
>>> so yes then the "falling edge" of the envelope is to fast.
>>> You have to get at least 5 ms raise/fall time on the envelope
>>> to make it decent.
>>> Don´t know if it´s ever possible to get an MP "click free", I
>>> know this much I would never use a FT1000MP on CW.
>>>
>>> The FT1000D I have is a "boarder case". I tweaked fiddled with
>>> it but I can´t say it´s "click free" however decent enough not
>>> to get complaints from others on the band.
>>>
>>> There is a W5 that claims he modified his MP and he says he got
>>> it click free. However I have forgotten his call sign, Google
>>> might be possible. As I understan it he did quite extensive work
>>> on it.
>>>
>>> / Jim SM2EKM
>>> ------------------------
>>> On 2010-06-04 11:13, g0afh wrote:
>>>   
>>>       
>>>> Hello
>>>>
>>>> I have just installed the W8JI key click mod to my FT1000MP. However,
>>>> whilst I can see an appreciable difference in the rising edge of the
>>>> keyed RF envelope, I see very little difference in the falling edge. The
>>>> falling edge is still rather too fast.
>>>>
>>>> Has anyone else seen this, and is there a solution?
>>>>
>>>> 73
>>>> Ian.
>>>> G0AFH.
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>
>
>