[1000mp] RE: filter info please

[Mike Schatzberg]

Hello All:

Although I have posted my opinion before regarding the narrow SSB filter
combination for the Mark V, I would again say that I find the Inrad dual 1.8
khz filters a bit too tiring for comfortable listening.

I prefer the Inrad crystal 1.8 khz filter in the 2nd IF, and the 8 pole
Collins 2.0 mechanical filter in the 3rd IF for long term listening.  This
pair, coupled with tracking the DSP filters in the 2nd IF, work very well.
Even better fidelity can be achieved on upper sideband with a slight
counterclockwise rotation of the shift control.

I now have the Inrad 4 khz 1st IF (roofing filter mod) installed, and this
has significantly lowered the noise floor in my radio.  I have lowered the
IF gain in menu 9-1 from the factory setting of 11, to 9.  This has resulted
in not only the improvements in IMD performance, dynamic range improvements,
as detailed on the Sherwood Engineering site, but also a much quieter
receiver and less whiskering from nearby strong stations.

The hiss level with the narrow filters is much improved, and with the
ability not to be desensed by strong nearby stations, I often use no filter
in the 2nd IF, and the 6 khz ceramic filter in the 3rd slot, to listen to
signals which are S 0 in signal strength.  There is practically no hiss at
all with this combination..

Before the Inrad roofing mod, a 50 microvolt signal from my generator was
S9, on 10 meters with the preamp on, and in the tuned, rather than flat
setting.  After the mod, the same signal became S9 plus 15 db, and I needed
to reduce the IF gain to S8, to achieve parity.  I finally have settled on a
setting of 9, as the best signal to noise ratio balance.

Just when I thought the Mark V couldn't get any better, it did.

Happy DXing,

Mike Schatzberg
WB2AJI
----- Original Message ----- 
From: "Hans Remeeus" <hans at remeeus.nl>
To: "All about Yaesu 1000mp" <1000mp at mailman.qth.net>
Sent: Tuesday, November 02, 2004 3:13 PM
Subject: Re: [1000mp] RE: filter info please


> Hello Doron,
>
> I have the 1000D and the Field. Both with Inrad filters.
>
> INRAD filters are g-r-e-a-t!
>
> Suggestions for CW:
>
> 2800 Hz
> 2100 Hz
> 1000 Hz
> 400 Hz
>
> For SSB:
>
> 2800 Hz
> 1800 Hz
>
> I exchanged the three standard Yaesu filters (also the two who are
soldered)
> by Inrad filters. To exchange the two soldered 8.2 MHz IF-filters needs
some
> experience...
>
> The menu to choose the filters of the Field is quite simple:
>
> - Press FAST and ENT together
> - With VRF/MEM CH you go to menu 5-1
> - You will see: oFF 8.2-2.0
> - Turn Main VFO-A to the right untill you see that 'oFF' changes to 'on'
> - do the same with menu 5-3, 5-5, 5-6, 5-7 or 5-8
>
> Good luck!
>
>
> 73, Hans Remeeus.
> Ham Radio: PA1HR
> www.remeeus.nl
>
> Communication is about people, the rest is technology.
>
>
> ----- Original Message -----
> From: <DELSONCOMM at aol.com>
> To: <1000mp at mailman.qth.net>
> Sent: Tuesday, November 02, 2004 6:31 PM
> Subject: [1000mp] RE: filter info please
>
>
> > hello
> > i am new to this group, however is any one can please help me on this
> issue
> > i had for many years the ft 1000d ,i now have the 1000 field
> > i am looking to add filters
> > so what the best to go for inrad or yaesu ?
> > i see in the picture that the is 2 filter that need to take the all
board
> > out
> > is this 2 filters can stay and i can add inrad or i cant mixd them
> > the 2nd part i cant understand how to install in the program all this
> filter
> > is any one have a step by step information how to set them up
> > the manual don't say much
> > many thanks for any information
> > Doron 4X1RG [Ron ] 73
>
>
>
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