[NLRS] Sequencer

Fri, 28 Nov 2003 01:15:20 CST

I've seen the other replies. Here are a few more 
places to look.

QEX Oct 1996 p.15. Design by Z. Lau. Feedback July 97.

ARRL Handbook 1997 has a design by N6CA, Chip Angle.
     See page 22-53 to 22-56.

QEX May 1996 p.14-22. Design by Paul Wade, N1BWT.
   "A Fool Resistant Sequenced Controller for Microwave
       Transverters".

2002 Microwave Update/Eastern VHF/UHF Conference
    Page 83-85. By Paul Wade, W1GHZ. This is a follow on to
    the QEX  article. "A Simple Yet Still Fool-Resistant Sequencer
    For Transverters".

73 magazine March 1993, p. 52-53. A simple circuit that uses
    diode to change the time constants between TX and RX.
    It also has an RF sense circuit. I've used the RF sense part
    of this design for many years. I haven't tried the sequencer.

73,  Gary  WB0LJC

On Thu, 27 Nov 2003 15:02:21 EST [email protected] writes:
>Anyone aware of a simple design for a solid state sequencer ?  On 
>transition 
>from receive to transmit the sequencer would delay the 12vdc to the 
>amplifier 
>(while the T/R relay energized) and on transition from transmit to 
>receive it 
>would then turn off the 12vdc to the amplifier before it de-energized 
>the T/R 
>relay.  Delay times would be around 100ms.  
>
>73, Jon
>W0ZQ
>

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