[UK-CONTEST] CC April CW TX Bandwidth

[Dave Sharred]

My MP is also unmodded; when I lived in Lichfield, and G3KDB did, we were
mutually loud with each other and had other strange effects, but neither of
us ever complained about key clicks and wide signals. There were original
MP's of 1996 vintage, if that makes a  difference.  The only person that
complained was a certain ON DXer, after he had changed his allegiance from
Yaesu  to some other exotica; on an empty band one morning.  Begs the
question how bad is bad ? !!

I don't recall mine looking bad when monitoring with a 'scope !

It should also be remembered that modding a radio like this could affect the
resale-ability of the radio; some folk would not want to buy a radio that
might have been modified by someone with 2 left hands; for fear of not
knowing what they are letting themselves into, no matter how well
intentioned !!!

73

Dave
G3NKC




-----Original Message-----
From: uk-contest-bounces at contesting.com
[mailto:uk-contest-bounces at contesting.com]On Behalf Of Clive Whelan
Sent: 11 April 2009 18:10
Cc: uk-contest at contesting.com
Subject: Re: [UK-CONTEST] CC April CW TX Bandwidth



Ian

Well myself and GW3RIH must have been very lucky in getting a couple of
good 1000MPs then, because we lived 500 yards apart and both ran 400w,
me using an Alpha 78 and Wes using a TL922, and we could operate within
10kHz of each other on 14Mhz , without insurmountable problems problems.
You don't suppose that could have been because we didn't overdrive the
amplifiers do you? ;-)

73


Clive
GW3NJW

Ian White GM3SEK wrote:
> Colin wrote:
>
>> I am not aware of causing problems with my old FT1000MP so if anyone
>> has noticed clicks from me please let me know.
>>
>>
>
> Congratulations for having the courage to ask in public, Colin.
>
> Here are some sound samples of what unmodified FT1000s *could* sound
> like (bottom of page):
> http://w8ji.com/keyclicks.htm
>
> There does seem to be some variability between individual rigs, but even
> the best of them are clicky and the worst are downright horrible.
>
>
>> What should the FT1000MP owner look for to see if it has been modified?
>>
>>
>
> Look for extra components under the IF board and the RF board - either
> this mod:
> http://w8ji.com/keyclick_mp.htm
>
> or the simpler Inrad version:
> http://www.inrad.net/files/Pubs/About%20Key%20Clicks.pdf
>
> Both mods are very similar, and involve extra components in the same
> locations underneath the RF and the IF boards. The easiest place to
> check is under the IF board.
>
> Step 10 on the W8JI page shows where to look for the mod under the IF
> board. The location is in parallel with C2148 (same number in all models
> of MP, but these small capacitors are not individually marked under the
> boards). The difference is that the Inrad mod uses just two fixed
> components (100K and 0.047uF) while the W8JI allows some individual
> adjustment and can give better results.
>
> The other part of the mod is underneath the RF board, and is the same in
> both cases: a 0.1uF cap across C1216 (in the original MP, C1004 in MkV
> and Field).  This is harder to get at, but if you can see that the IF
> board mod has been done then it's a safe bet that the RF board will have
> been done too.
>
> If you do need to get at the underside of the RF board, W8JI has
> provided detailed photo instructions. When you actually arrive at
> C1216/1004, simply solder the 0.1uF in parallel with the existing cap
> (no need to bring out a wire lead like W8JI did).
>
> The mods aren't actually difficult - it's mostly a matter of confidence
> - but they do need to be done.
>
>
>
>
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