[1000mp] Noise reduction in the FT-1000MP Mk-V

[Uwe Fleischer]

Hi Mike,

thanks a lot for your listing of various "buttons and sliders" to minimize
the noise of the FT-1000 RX. As this was a little off-topic under the title
"Comparison of FT 2000 to Mark V" I answered under a new topic.

Some of your suggestions are already implemented on my TRX, e.g. enabling
the digital product detector, or installation of the roofing filter. But as
the roofing filter has been already installed when I bought the TRX in last
summer, I'm not sure whether the IF gain in menu 9-1 is set correct
(reduced) or not.

I will carefully check all your suggestions and report the result, as this
might be a worthy help for other users who'd like to optimize their FT-1000.
This might take a while because I'm very busy at the moment (got an
engineering bureau as my own business, a family with 3 wonderful boys and
started to extend our house last year, hi).

73 de Uwe, DL8UF



> Hello Uwe:
> 
> I have found the installation of the roofing filter module to be useful
> for
> reduction of noise.  Number one, it allows less noise into the front end
> because of the narrower band width, and the two stage low noise amplifier
> which follows it,  more than makes up for the insertion losses of the
> crystal filter in series with the original 1st IF filter.
> 
> This allows you to decrease the IF gain in menu 9-1, which in turn further
> decreases noise.  I have reduced my setting by 2 or 3 integers, which is
> quite significant.
> 
> The use of the various DSP settings in the receiver also reduce noise,
> with
> listening to the digital product detector being quieter than the use of
> the
> analog detector.
> 
> Finally, although I have found the noise reduction with the on board DSP
> in
> the audio chain to be pretty useless, I have found an outboard solution
> which works amazingly well.  I have an article in the March issue of QST
> which gives full information on this product.  You can see the page from
> QST
> here on my website: http://home.earthlink.net/~cherokeehillfarm/id2.html
> 
> The last improvement is the most significant, and I leave the new DSP
> module
> in line at all times.  I don't think the radio could be much quieter now.
> It also automatically adds some attenuation to heterodynes as well, so
> this
> solution is mainly for SSB.  With proper adjustments you won't know the
> radio is on until a signal enters the bandpass.  The hiss is all but gone.
> You will be able to work S0 signals without headphones.
> 
> I believe the radio with all these mods is far better than stock.  I am
> interested to see if the ability to work even closer to strong adjacent
> channel interference is improved in the FT 2000.
> 
> 73 and Happy DXing,
> 
> Mike
> W2AJI