[AMRadio] Re: Need list of good AM radios to start lookingfor.


John Coleman ARS WA5BXO wa5bxo2005 at pctechref.com
Wed Nov 16 21:43:12 EST 2005


I don't know if the power supply come from the same XFMR or not but what
does "10 on the knob" mean?

John,
WA5BXO


-----Original Message-----
From: amradio-bounces at mailman.qth.net
[mailto:amradio-bounces at mailman.qth.net] On Behalf Of John Lawson
Sent: Wednesday, November 16, 2005 8:02 PM
To: Discussion of AM Radio
Subject: Re: [AMRadio] Re: Need list of good AM radios to start
lookingfor.

   For my Ranger / amp situation, I originally looked at doing exactly 
this.  I have a couple of reservations - first is that the LV Supply
will 
have to stand the additonal load over the long haul, and second that I'd

really rather the mod section be running at "10 on the knob".

   Also, the resistor, if variable (even the 'slider' type) allows one
to 
adjust the output as needs be - I want to run RTTY which is even more 
severe than AM in terms of overall duty cycle , and I want to spare my
old 
amp (an Ameritron AL-80) as much as possible.

   Then again, I have the schematics for the "attenuator" as Johnson
called 
it - to go between the Ranger output and linear input.



  And of course there a lots of topologies that will accomplish the task
of 
lowering the output of a tetrode or beam-power RF section without 
upsetting the relative current balances.

   Mebbe I oughta should by a junker Ranger... Just In Case...   ;}


Cheers

John  KB6SCO

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