[1000mp] Sound Card - FT1000MP

[Harry Yingst]

Ron,

It is better to use the DVS-2 port

Go here for a schematic:

http://www.va3cr.net/graphics/IMG0.GIF







--- Ronald Walters <rwalters8 at cfl.rr.com> wrote:
> I have a low level audio out from the sound card homebrew interface
> that I
> currently have connected to the Packet jack on the back of the rig. 
> Works
> great
> for all digital modes and allows for front mic input muting when in
> the
> digital modes.
> 
> Digital modes I want to try is the MT-63 and SSTV.
> 
> My old vintage FT1000MP does not support the Packet mode in USB, only
> LSB
> and FM.
> 
> MT-63 on 20 meters is a USB function so I need to utilize a different
> audio
> in to the FT1000MP.
> 
> Looks like I have three (3) choices, one being the Audio "Patch"
> input using
> a standard Phono jack, microphone connector front panel and the other
> is the
> DVS input jack, however, that jack has some control function cable
> requirements that I am still not sure about there functionality.
> 
> Unless I build a new microphone cable to my interface and change from
> mic to
> sound card connector every time I change modes I am thinking of using
> the
> phono input connected to a "Y" connector at the mic out connector at
> my
> interface which has transformer isolators and adjustable resistor
> network.
> 
> My initial concerns are running the two inputs in parallel, that is
> the
> Packet audio in (It only becomes active during PKT selection) and the
> phone
> jack input impedance (load).  I realize that when I elect to use the
> phone
> input I still will need to disconnect the microphone. I am also
> concerned
> about leaving the patch input connected during non digital mode
> activity and
> possible introducing RF feedback or just plain hum.
> 
> Before I embark on the re-cabling needed I thought that I asked from
> the
> experienced digital operators probably the safest is a second
> microphone
> front panel connector.  Any thoughts?  I only need a USB audio in
> since I
> key the rig through the CAT interface in all modes.  Any
> recommendations?
> 
> Ron W4LDE
> 
> 
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=====
Harry - AB2PN

-


	
		
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