When my DSP unit packed up on the 1000MP it turned out to be the surface
mount electrolytic capacitors had dried out! Think there are 8 of them. All
replaced and no further problems. My symptoms were similar to what you have
experienced.
PCB gets quite hot sealed in that tin screening box plus there is a voltage
regulator in there generating heat!
73 de Martin G3ZQU
----- Original Message -----
From: <yaesu-request@contesting.com>
To: <yaesu@contesting.com>
Sent: Saturday, June 05, 2010 8:00 PM
Subject: Yaesu Digest, Vol 90, Issue 3
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> Today's Topics:
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> 1. Intermittent DSP (jcowens1@comcast.net)
> 2. Re: FT1000MP Key click mod (G0AFH)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 4 Jun 2010 19:36:58 +0000 (UTC)
> From: jcowens1@comcast.net
> Subject: [Yaesu] Intermittent DSP
> To: Yeasu Reflector <yaesu@contesting.com>
> Message-ID:
> <124102518.210731275680218425.JavaMail.root@sz0050a.emeryville.ca.mail.comcast.net>
>
> Content-Type: text/plain; charset=utf-8
>
>
>
> I have been experiencing intermittent DSP circuit function in my
> FT-1000MP. The receiver appears to be working properly with the DSP
> curcuits not activated (DSP switch off and not lit), but no audio is
> coming through if the DSP switch is on and lit if there are are any
> settings for CONTOUR or NR.? If both of those controls are set to OFF, but
> the DSP switch is pressed and lit, the audio comes through unfiltered.
> This occurs for either SSB mode settings (LSB or USB) or CW. Audio seems
> normal for AM, FM or other mode settings.
>
>
>
> When I say intermittent, I mean that with the DSP circuits activated with
> some DSP CONTOUR or NR settings, there is no audio coming through at all,
> and then it will?randomly start coming through with DSP circuits working
> properly, and then may disappear completely again. It sort of toggles off
> and on randomly.
>
>
>
> Has anyone experienced this kind of problem before?? If so, how did you
> deal with it.
>
>
>
>
> John Owens - ?N7TK
>
> Celebrating over 50 Years in Ham Radio
> No. 1 Honor Roll
>
>
> ------------------------------
>
> Message: 2
> Date: Sat, 05 Jun 2010 07:20:33 +0100
> From: G0AFH <g0afh@g0afh.com>
> Subject: Re: [Yaesu] FT1000MP Key click mod
> To: Yaesu@contesting.com
> Message-ID: <4C09ECB1.8040904@g0afh.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> 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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>>>>>
>>>>>
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>>
>
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