[1000mp] Plan B SM-220?- Full Dual Multi Band Receive Mod for FT-1000MP - AnyInterest Anyone?

[WD8ARZ]

Good distinction Earl.

My intention for posting was both .... Hi Hi

There are some great resources in this group, and between them and George, 
this would be a win win for all is my hope.

To expand this a bit, please see option B copied below. Instead of the BPF-1 
project, open up the sub receiver ahead of the MP/MkV/Field band pass filter 
section (with a Inrad 200Khz roofing filter?), and use the SM-220 Spectrum 
Scope on it. Having the option for the sub receiver frequency to track the 
main receiver tuning would be nice too.

73 from Bill - WD8ARZ

----- Original Message ----- 
From: "Earl W Cunningham" <k6se at juno.com>
To: <1000mp at mailman.qth.net>
Sent: Thursday, June 02, 2005 10:31 AM
Subject: Re: [1000mp] Full Dual Multi Band Receive Mod for FT-1000MP - 
AnyInterest Anyone?


> WD8ARZ wrote:
>
> "Would any of you be interested in supporting Inrad in a modification
> that would provide true full dual receive in your MP/MkV/Field? Operate
> on 10M main receiver, and listening on 160M on the sub receiver??"
> ==========
> If "supporting INRAD" means buying the mod, my answer is yes.
>
> 73, de Earl, K6SE

----- Original Message ----- 
From: "WD8ARZ" <wd8arz at ix.netcom.com>
To: <List at inrad.net>
Sent: Sunday, February 27, 2005 3:42 PM
Subject: [INRAD] SM 220 Monitor Scope, Full Dual Receive,and Trackable Dual 
Receive


> One of the challenges for the Mp/MkV/Field is going to be the roofing 
> filter
> that has a 12khz bandwidth in the first I.F.
>
> Obviously to get more than 12khz of bandwidth on the panadpter display, 
> the
> take off point from the i.f. has to be ahead of this. A mixer will need to
> provide enough gain at the desired i.f. frequency required by the 
> panadapter
> in use (mine is between eight and nine megahertz), and not  load the MP or
> introduce noise or distortion.
>
> Some time ago I posted info from Japan about a modification to provide
> separate full mode / frequency operation of the dual receivers. Fully
> independent of each other. I can't help but wonder if that mod would help
> with a interface for the SM-220?
>
> http://www.va3cr.net/main/dual%20receive%20mod.htm
>
> The idea here would be to tap ahead of the current roofing filter, use a
> wider roofing filter, and feed to the sub receiver. Then use the Sub
> Receiver for the IF tap to the SM-220.
>
> So this makes for three modification projects.
>
> 1) Full Dual Receive with a wide / narrow roofing filter that is a
> switchable option.
> 2) Sub Receiver IF fed to the SM-220 using what ever mixer is needed.
> 3) Enabling the Sub Receiver to tune with the Main Receiver.
>
> 73 from Bill - WD8ARZ