[1000mp] ETO 91b and yaesu keying

[Jay Bromley]

Hi Marc,
Try this link out.   http://www.qsl.net/n1eu/Yaesu/MPAcom.htm

I made up a cable that goes to my band data jack in the back of FT-1000mp 
Mark V Field and use both the Key In and Key Out jacks with my Alpha 99. 
The setup works great!  Make sure you have the right DIN connector.  You can 
get them direct from Yaesu.  The standard 8 pin DINs will damage the DIN 
socket Yaesu uses in the back of rig.  On my Mark V the 10K ohm pull up 
resistor was needed for what you are trying to do.  If you wire your rig up 
per the diagram you can check it by removing the Key-Out cable.  If you made 
the cable right the rig will not transmit without the Key Out jack hooked 
up.  For that matter just plugging in the DIN plug should do the same thing. 
Hooking the Key-Out jack back up you should have output from the rig. 
Wiring the rig and amp this way should remove any chance of hot switching. 
Funny that Alpha sells a pre-made cable that only uses the one line.  It 
does allow you to use transistor keying from the Mark V and makes the 
operation quieter, but for around $50 you would think they could add the 
second cable.  I guess with all the protection that have in the amp they may 
think it is not necessary??

Now a days hot switching may not much of a problem with vacuum relays and 
rigs with transistor switching.  But I did ruin a Jennings relay in my Alpha 
77 DX before getting smart.  I don't use full break-in to much with the 
current setup, but I think it runs smoother in semi-break-in mode.  I do use 
the rig in QSK when I am barefoot mode and love it.

Don't forget if you ever unhook the cables to the amp, be sure to add a 
phono barrel or unplug the band data jack or you will have no output.  I had 
my Alpha unhooked and forgot about why no power output.  I felt pretty 
stupid when I remembered why!

Using old AM rigs like the KW-1 and the Johnson Desk KW will teach you a lot 
about relay sequencing!  One of my old Dow Keys had a grove cut in the 
insulator before I smartened up.  Things are much better these days!!

I would like to think Barry for making this information available.

Gud luck and let me know how you make out.

73 de jay..





----- Original Message ----- 
From: "Marc Wullaert" <marc.wullaert3 at pandora.be>
To: <amps at contesting.com>
Cc: <1000mp at mailman.qth.net>
Sent: Sunday, March 27, 2005 2:46 AM
Subject: [1000mp] ETO 91b and yaesu keying


> Hi ,
> I'm a bit confused.I want to connect my Yaesu ft1000mp to my
> ETO 91b ampli via the banddata of the radio.
> On the back of the 91b you have RELAY  and KEY  OUT.
> I want tho use the Key out also to not have hot key switching while
> using qsk.
> My thaugt was to connect the Key out to the TX INHIBIT off the
> radio.On the alpha site they say to connect TX INHIBIT to the ground
> on the Relay jack.
>
> I thaugt that the KEY OUT  is for thelling the radio all is ok you can
> transmit or
> give power out ? Wright
>
> Could someone set a light on this ?
>
> marc on4ma
>
>
>
>
>
>
>
>
> -- 
> No virus found in this outgoing message.
> Checked by AVG Anti-Virus.
> Version: 7.0.308 / Virus Database: 266.8.3 - Release Date: 25/03/2005
>
> ______________________________________________________________
> 1000mp mailing list
> Home: http://mailman.qth.net/mailman/listinfo/1000mp
> Help: http://mailman.qth.net/mmfaq.html
> Post: mailto:1000mp at mailman.qth.net
>