[1000mp] Mark V Sensitivity and DSP

[Bill Axelrod]

Interesting thread.  I've had a MK5 fore 2 years.  My observations are
similar to Bob's.

I find that the DSP noise reduction and various contours works fairly well
on CW.  To me, they don't seem to make a difference at all on SSB.  On CW,
contours C and D seem to help pretty well on the low bands when I have the
selectivity wide.  When I use the 500 Hz or 250 Hz filters, the signal to
noise ratio changes enough that the DSP doesn't help a bit.  I don't have
the front end mod.

I'd really like to hear about a side-by-side comparison with another
receiver.  Perhaps the MK5 is just as good as it gets.

73...   Bill K3WA


----- Original Message -----
From: "Robert Williams [EA7FGS]" <simba@mercuryin.es>
To: <1000mp@mailman.qth.net>
Sent: Thursday, November 07, 2002 12:50 PM
Subject: Re: [1000mp] Mark V Sensitivity and DSP


> Not seen any comments on your original input Joe but I thought them very
interesting. I have the
> 1000MP not the MK5 but think the same remarks apply, the DSP noise
reduction and various contours
> are pretty useless, even more so when the received signal is weak, in fact
the most noticeable
> effect of using them on a weak signal is to lose it.
> I've had the rig 4 years and I quite like it, all the mods are fitted but
as you say the only effect
> of the DSP is to colour the noise. Prior to the 1000MP I had a Kenwood
940S and I reckon the
> receiver was probably much better until it got a little long in the tooth.
> Now there are a lot of fine and experienced operators out there who swear
by this Yaesu range so
> perhaps they know something we don't. I guess it's such a subjective
matter that conclusive opinions
> are hard to come by but I reckon that in this day and age a good designer
could come up with
> something better.
>
> Bob EA7FGS ex G4LVQ.
> ----- Original Message -----
> From: "J.R." <joeram@texas.net>
> To: <1000mp@mailman.qth.net>
> Sent: Wednesday, November 06, 2002 4:12 AM
> Subject: [1000mp] Mark V Sensitivity and DSP
>
>
> Let me start off by saying I am a big time Yaesu fan! I have always owned
at least 4 or 5 pieces of
> Yaesu equipment at any given time and I think they make great products.
>
> Ok. I've waited and thought about this for a very long time. I took
delivery of my Mark V about one
> year ago and found the receiver to be less sensitive than my TS-850. I
professionally installed the
> INRAD front end mod and it made a world of a difference. The radio was on
par, if not slightly
> better, at times, (sensitivity) than the TS-850, but not by much. Although
there is a noticeable
> increase in sensitivity, it still seems the radio does not pull signals
out of the noise all too
> well. Some signals are heard better on my old FT-101E!
>
> After fooling around with all the front panel buttons, as well as all of
the menu items (such as DSP
> settings and the infamous 8-9 and 9-0 menus) I have concluded the DSP is
marginal at best at
> reducing noise. Over the past year I have encountered few occasions where
the DSP made a noticeable
> difference... 99% of the time is did nothing other than color the noise.
Of the time the DSP made a
> difference it  was in CW, but there were a few in SSB.
>
> I have adjusted every menu item as well as used a number of features
simultaneously. You name it, I
> most likely did it.
>
> My radio is configured with the INRAD mod and the optional 2.0 Khz - 8.2M
SSB IF filter
>
> Perhaps there are some settings I don't have quite right. Help.... as I am
contemplating going to
> another manufacture (TS-950SDX).
>
> Thanks for your time.
>
> Joe
> KC5DFP
>
>
>
>
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