TIP: Click on subject to list as thread! ANSI
echo: ham_tech
to: BOB ALBERT
from: ROY WITT
date: 1997-08-08 08:17:00
subject: Simple feedback tone encoder you can bui08:17:4808/08/97

Hello Bob.
06 Aug 97 17:29, Bob Albert wrote to Roy Witt:
 BA> The problem with that circuit is that the frequency isn't very stable.
 BA> Or repeatable.  Unless you stabilize the power supply the frequency
 BA> will vary with supply variations.
Gee, I wonder how the repeater notes that?  Suppose it doesn't care?  It 
doesn't....
 BA> A better circuit would use a crystal and a PLL chip.  You can buy,
 BA> for very littls, a programmable PL chip.  I have one and it works
 BA> great, stable and repeatable.
Yes it would.  However, it would be a lot more expensive than this one. This 
one works, as I and many others have used it over the last 15-17 years to 
access a repeater.  I've got Comm Spec PL encoders/decoders and they work 
without a flaw.  But you pay for that quality...
 BA> Which MARS are you in?  I was AAT9IM until I became disgruntled a few
 BA> years ago and dropped out.  I'd get back in if a certain person left
 BA> the organization..
Mars?  I'm on earth...
... That dragon's a wuss...a wimp...behind me, isn't he?
---------------
* Origin: KB6PI's Antenna Farm * San Diego, CA (1:202/909.10)

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