[ARC5] The not-so humble BC-221/LM-xx frequency meters.

[Leslie Smith]

Well Jeff, when you do this very interesting "thing", don't be mean!
Share your results and experiences here!    I (for one) am interested in
your result.

I know the frequency counters etc are not ARC-5 - not by any measure -
but I think it's interesting enough (and serious enough) to share.   I'm
certain nearly every-one on this list will read your result with great
interest.

BTW - amateur radio is amateur radio.  That means you can be as precise
or as sloppy (within the constraint set by law) as you like!    There is
a group of experimenters in Tasmania (VK7) that communicate by light. 
(Had to apply for an experimental license to work at optical
frequencies!!).  Their best distance to date - between Hobart and
Launceston (about 120mi).  Cool!   

There is a Russian guy (I figure he is Russian, his name is Vladmir N)
who has "worked over" the humble regen receiver, using modelling
software.  Using that approach he build a set that tunes 3.3MHz to
(about) 9MHz without the need to touch the regen control!  Now THAT is
cool.   Vlad made the outrageous claim that he wore out the carpet
between his work-shop and computer when he compared 'real' and 'model'. 
 (I'll bet he didn't really wear out the carpet!!)  This is the opposite
approach to the Tasmanian experimenters.  Vlad took something very old -
supposedly well understood - the humble regen receiver and set about
REALLY understanding it!  Very cool, in my opinion!

But the most interesting work I've seen was done by a Dutch experimenter
who set out to discover those factors that affect "Q".  His (very
practical) results are very interesting.  His final tank circuit had a
"Q" of about 1000 in the middle of the BC band.  Maybe a touch higher,
maybe a little lower - but patient well documented experimental work.  
He was (I think) a REAL amateur experimenter.

  73 de Les Smith
   vk2bcu at operamail.com

                                                      o-o-o

On Sun, Dec 25, 2016, at 08:03, n2lxm at juno.com wrote:
> 
> Been reading the mail about this. Now I want to make something I have
> been wanting to do for awhile. I have some GPS Engines. Which will give a
> serial data stream and a 1PPS output. So my plan is to work up something
> that will take the 1 PPS signal from the GPS, run it into a comparator
> and use the out put to drive a vareactor diode to trim a 10Mhz
> oscilactor. I have all the parts. So bread boarding someting up should
> not to ard. May even use a Rassbery Pi to handle the data.
> 
> 
>                                                     Jeff N2LXM
>                                                       American
>                                                         Patriot
>                                      Proud Father of Two US Marines
> 
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