[Elecraft] 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" <k2gn at comcast.net>
Subject: [Elecraft] K3 to VL-1000 AMP
To: <elecraft at mailman.qth.net>
Message-ID: <8B330348545A477698393DB61CE2E47B at 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