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

[Bill Cromwell]

Hi,

Yes, please post here. The old curmudgeons aren't as cranky as everybody 
says.

73,

Bill  KU8H

On 12/24/2016 05:18 PM, Leslie Smith wrote:
> 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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-- 
bark less - wag more