[UK-CONTEST] FT Key Clicks & ALC

[Ian Trusson]

Chris,

I had a look at this a few days ago on my Mk V. I don't think you can be
doing it right if you can't see the ALC level reduce when you adjust the TX
IF amp gain - you need to select the band on the menu then select the band
on the radio then adjust one band at a time. 15 is not right at all and is
not the usual default level. 

In the service manual they describe a different method of setting the levels
which would be the method by which your radio would have been set up when it
left the factory. I wasn't willing to trust W8JI's method completely so I
just reduced the gain slightly and ended up with:

9-2 TX IF Amplifier Gain
TIF-018 	7 	6
TIF-035 	6 	5
TIF-070 	6 	5
TIF-100 	6 	5
TIF-140 	7 	6
TIF-180 	7 	6
TIF-210 	7	6
TIF-245 	7 	6
TIF-280 	8 	7
TIF-290 	9 	7

The first column of settings shows the ex-factory settings and the second
column the settings which I ended up with. These figures will be different
for different radios due to manufacturing tolerances so you do need to do to
set up your particular radio.

Regards,
Ian Trusson, G3RVM
www.firstclasscw.org.uk
27A Roman Way, Thatcham, Berks RG18 3BP, UK.  Tel: 01635 826019



> -----Original Message-----
> From: uk-contest-bounces at contesting.com [mailto:uk-contest-
> bounces at contesting.com] On Behalf Of G3SJJ
> Sent: 24 February 2007 10:43
> Cc: uk-contest at contesting.com
> Subject: Re: [UK-CONTEST] FT Key Clicks & ALC
> 
> I have just tried this on my FT1kMP but couldn't see any change so may
> be the MP has fixed gain.
> 
> On all bands the ALC level is past the end of the red line but around
> 75% along the whole scale (the instructions are a little vague about the
> actual position.) Level with the 100w marker on the PO scale,
> 
> The default level was at maximum, 15, and varying it did not make any
> difference to the indicated ALC level.
> 
> Chris G3SJJ
> 
> 
> 
> G3SVL wrote:
> > At 14:58 23/02/2007, Ian White GM3SEK wrote:
> >
> >> But having said all that, the worst clicks of all are probably due
> >> to people trying to use full QSK with an amplifier that can't keep up.
> >>
> >
> > Another source is the initial key down when the ALC is being over
> > worked due to excessive tx gain.  On the MkV that's easy to adjust
> > from the menu (see http://www.w8ji.com/ft1000mk_v.htm).  I set mine
> > up as per Tom's instructions and cured an occasional linear trip
> > problem. I surmise that there was a peak of RF output when the key
> > went down that the ALC could not react to.
> >
> > Chris G3SVL
> >
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