A 3-500 based amplifier doesn’t need any ALC with a 100 watt radio. Your 756
has an adjust RF output. You can control the amount of output you need to
drive the amp you really don’t need a matching combination, simply don’t use
it. If it’s not compatible you can’t anyway. Use the RF output control to set
the drive level.
Sent from the all new AOL app for iOS
On Saturday, October 22, 2022, 1:58 PM, A Lawrence Fibich
<lfibich@sbcglobal.net> wrote:
Guess I am not sure how to post a listing -- thanks..
Larry FW6EF
----- Forwarded Message ----- From: A Lawrence Fibich
<lfibich@sbcglobal.net>To: amps-request@contesting.com
<amps-request@contesting.com>; amps-owner@contesting.com
<amps-owner@contesting.com>Sent: Friday, October 21, 2022 at 11:32:03 PM
PDTSubject: help
Subject: Questions: Connecting a Drake Amplifier
Hit a roadblock I am not understanding. I wanted to connect a Drake L-4
Amplifier (also have a Drake L-7 - same problem). Looking at the input the
unit/s want - they want AGC input - I am familiar that ALL other Amplifiers I
have used accept/require ALC input. I am trying to drive either of these units
with a ICOM IC -756 - it only outputs an ALC. Of course the definitions of AGC
and ALC is not the same - or about the same functions.
Then also - beyond my understanding clearly caution in the manual ... "WARNING:
Set the Transceiver output power and linear amplifier ALC output level
referring to the linear amplifier instruction manual. The ALC input level must
be in the range 0 V to -4V and the transceiver does not accept positive
voltage. Non-matching ALC and RF power settings could cause a fire or ruin the
linear amplifier."QUESTION: 1. How do I connect the ICOM to the Drake Amp? - ?
what if not connecting anything to the AGC on the Amp?2. How could a
'non-matching ALC and RF power setting cause a fire? ?over heating the Amp?
Thanks for any assistance73W6EFLarry FibichSacramento, CA area
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