K3 to VL-1000 AMP

[Adam Farson]

Hi Larry,

You can interface the K3 with the Quadra via the procedure described here:

http://www.ab4oj.com/quadra/interface.html

The page describes the interface to an Icom exciter, but will work with the
K3. Connect Quadra Band Data 2 Pins 9 and 11 to K3 ACC Pins 5 (Ground) and 4
(PTT IN) respectively.

The K3 must be equipped (or modified) for negative-going ALC. Correct
connection and adjustment of the ALC loop is absolutely mandatory when
driving the Quadra, to prevent overdrive and to ensure proper operation of
the amplifier's protective subsystem.

As described on the page, band selection and tuning are semi-automatic. For
automatic band tracking, the K3 band-selection data (K3 user manual, p. 16)
appears to be identical to the Yaesu data, so you should be able to connect
the band-selection lines as follows:

K3 ACC Pin 13 (BAND0 OUT) to Quadra Band Data 2 Pin 4 (D0)

K3 ACC Pin 3 (BAND1 OUT) to Quadra Band Data 2 Pin 5 (D1)

K3 ACC Pin 9 (BAND2 OUT) to Quadra Band Data 2 Pin 6 (D2)

K3 ACC Pin 14 (BAND3 OUT) to Quadra Band Data 2 Pin 7 (D3)

Quadra Band Data 2 is a DB15 socket.

See also: http://www.ab4oj.com/quadra/interface_mp.html

Hope this helps.

Cheers for now, 73,
Adam VA7OJ/AB4OJ


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Message: 1
Date: Thu, 9 Jul 2009 12:13:19 -0400
From: "Larry - K2GN" <[hidden email]>
Subject: [Elecraft] K3 to VL-1000 AMP
To: <[hidden email]>
Message-ID: <8B330348545A477698393DB61CE2E47B@K2GN>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
        reply-type=original

Anyone driving a Yaesu VL-1000 (Quadra) with a K3?
Wonder if there is an interface available to drive the AMP for Band
Selection.

Thanks in advance.

de K2GN/Larry


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[Larry - K2GN]

Thanks to all who replied.
I got plenty of info to read up on now.
I just need some local to help do the cable.  
(Can't solder those little guys with one hand, the other is coming along but needs a lot of work after a recent stroke.)


de K2GN/Larry
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