Re: ALC Adjustments to enable QRP

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From: Alan Kaul (kaul@netcom.com)
Date: Fri May 06 1994 - 10:49:27 EDT


        
  Tnx your note Jim.
  And tnx to all others who provided information.

  ICOM published the circuit in an ad in QST (Tech Talk# 84, QST,
Dec. 1992, Page 184) and claimed it will work for all Icom transceivers
(although I think some of the old tube types might require positive
instead of negative ALC voltage). The circuit is as follows:

 

                        100k variable resistor
                /\/\/\/\/\/\/\/\/\|---------------|
                | ^ - _
 ALC (o)-----|---------| -----
          | - 1.5v battery
 GND ___ -----
             \\\ | +
                                                  |
                                                 ___
                                                 \\\

                Icom claims: -1.25v = 5w output
                                 -1.30v = 300 milliwatts
                                 -1.33v = 100 milliwatts

73, 72 de alan

                  [<Alan Kaul, W6RCL>] kaul@netcom.com
                                     


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