[Amps] Pulser

[Jim Thomson]

Date: Mon, 10 Sep 2012 18:20:45 -0400 (EDT)
From: SavanaPics at aol.com
To: k6uj at pacbell.net, amps at contesting.com
Subject: Re: [Amps] Pulser

Larry, a fellow HAM in the Atlanta area makes a device called the PECKER. 
it was a big hit years ago on the 3898 group and is still quite popular ( 
not to mention reasonable) it is available in either assembled or kit 
format. Go to _www.mrpecker.com_ (http://www.mrpecker.com) . If it is for an 
Icom, be sure to ask about the 100 mfd non polarized electrolytic

Eddie, kc4awz

##  The problem with that 3898 pecker device is that is has NO  output control on  it !
95% of the time it will  blow your alc right to the peg. If you have an analog type alc meter
it gets even worse, since the alc meter isnt really rading true peaks, like a peak reading led type
alc meter.   Then folks further screw things up by leaving their processor cranked up full  tilt
while using the audio type peckers.  Any type of audio pecker needs an output pot on the end of it. 

##  On the FT-1000D,  a string of 60 wpm dits  will  result in a 50%  duty cycle.
On my FT-1000MP-MK-V,   the dot dash ratio can be tweaked individually for  both
dots and dashs.    The default setting is  dots= 10   and dashs = 30 .    Each can be
set  anywhere from 1-129 ! 

##  In the default 10-30 ratio,  a  string of 60 wpm dots will result in a 50%  duty cycle. 
To reduce the duty cycle, the DOT setting is simply reduced to a setting below 10.
IE: while sending dots at 60 wpm, reduce the dot setting from  10 to 9 to 8 to 7 etc.
I think a  DOT setting around  7-8  results in a 30%  duty cycle.   A setting of 1-5
results in a very low duty cycle. 

##  For normal CW  operation, I use  Dots = 10..... and dashes = 36.  
Then I end up with a dot –dash ratio of  1:  3.6      Which is weighting I like.

##  For pulse tuning, DOT  settings  of 5-8  work great.   BUT  you have to 
remember to put the dot setting back to 10   for normal CW operation. 

Jim  VE7RF