ALC Adjustments to enable QRP

---------

From: C=BAILEY%IS%211EIS@ANG193FS.ang.af.mil
Date: Thu May 05 1994 - 07:37:25 EDT


Forwarded to: DDN[qrp@Think.com]
          cc:
Comments by: C BAILEY@IS@211EIS
Comments:

I own an Icom IC-726 same version of the 725 except it has 6 meters. There
is a low power adjustment pot inside the rig. I have set mine at 5 watts.
The factory puts this at about 7 to 10 watts. You may use the circuit you
read about, which uses the ALC circuit. I have researched this, but I do not
recall if the voltage required is + or -. If you have more questions, please
reply. I will check my service manual info.
72 de Cameron, KT3A.

   -------------------------- [Original Message] -------------------------
Received: by PAMDT.ANG.AF.MIL; Wed, 4 May 94 21:23:54 EDT
Received: by mail.think.com; Wed, 4 May 94 20:07:03 -0400
Received: from Think.COM by mail.think.com; Wed, 4 May 94 20:06:43 -0400
Received: from netcom.com (netcom8.netcom.com) by Early-Bird.Think.COM; Wed, 4 May 94 20:06:37 EDT
Received: by netcom.com (8.6.8.1/SMI-4.1/Netcom)
        id RAA29923; Wed, 4 May 1994 17:07:55 -0700
Date: Wed, 4 May 1994 17:07:54 -0700 (PDT)
From: Alan Kaul <kaul@netcom.com>
Subject: ALC Adjustments to enable QRP
To: QRP@Think.COM
Message-Id: <Pine.3.89.9405041632.A27942-0100000@netcom8>
Mime-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: qrp-admin@Think.COM
Precedence: bulk

An April 1990 issue of QRP Quarterly -- in WA8MCQ's Idea Exchange --
refers to a July '89 QQ issue which discusses using a small
battery, a switch, and a pot connected across the battery to ground which
then connects thru the wiper to the ALC input stage of transceivers.
The circuit -- introducing artificial ALC voltage to the rig -- enables
very fine adjustments in the ALC feedback voltage to enable QRO
transceivers to reduce power down to QRP levels. Anyone out there know if
it'll work with an ICOM IC-725? And whether the voltage required is
positive or negative?
Thanks, 72 de alan
                     [<Alan Kaul, W6RCL>] kaul@netcom.com
                                     


Search QRP-L Archives

[ QRP-L Archive | ]
[ 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 ]

---------

This archive was generated by hypermail 2b29 on Fri Jun 02 2000 - 11:26:47 EDT

kd4ab@kd4ab.org