Lest We Forget

[K8DO at aol.com]

Exerpted from 200 METERS AND DOWN... copyright ARRL 1936

ELECTRICIAN & MECHANIC published the following table in 1907 showing the
relative performances of different types of transmitting and receiving
equipment of the day.

SPARK COIL      ANTENNA HEIGHT     COHERER      LIQUID DETECTER
     SIZE
                                                                     OR
 BARRETTER

   1/2 INCH                   35 FEET             1/8 MILE          1/4 TO
1/2 MILE
     1 INCH            40 - 45  FEET             1/4 MILE         1/4 TO 3/4
MILE
     2 INCH                   50 FEET        2 1/2 TO 3 1/2          5 TO 10
 MILES
     4 INCH*                  75 FEET               10 MILES        10 TO 20
 MILES
     6 INCH*                100 FEET               15 MILES        15 TO 30
 MILES
   10 INCH*                150 FEET               50 MILES         50 TO 75
MILES
   15 INCH*                180 FEET           60  TO 75            75 TO 100
MILES

* = TUNED

An alternative to the 15 inch spark coil was an oil immersed 1/4 kilowatt
transformer and a battery of Leyden jars; with this combination 100 miles
was guaranteed.

Denny    k8do at aol.com


>From dnorris at k7no.com (Dean Norris)  Tue Jun 25 23:08:09 1996
From: dnorris at k7no.com (Dean Norris) (Dean Norris)
Date: Tue, 25 Jun 1996 15:08:09 -0700
Subject: Steve Mendelsohn's letter
Message-ID: <2.2.32.19960625220809.0069408c at mail.syspac.com>

At 18:30 6/25/96 PDT, you wrote:
>Aren't we missing the point here? ARRLs flat membership ( based on their QST
>circulation data which includes other than members ) represents about 20%
of the
>US ham population. 



What?  That would be 50,000,000, 50 million.  No way!  I think you added a
few 0000's to the copy?  Or...if I am wrong, god help us.  Where did you see
those figures.  I have been a member for 40 years and a life member for 20+.
If you could tell which issue quotes those figures I would like to see them..


73/DX

cdn

           C. Dean Norris
      Amateur Radio Station K7NO             
      e-mail to dnorris at k7no.com             
    http://www.syspac.com/~dnorris/


>From dave at egh.com (David Clemons)  Tue Jun 25 22:44:15 1996
From: dave at egh.com (David Clemons) (David Clemons)
Date: Tue, 25 Jun 1996 17:44:15 -0400
Subject: Denny K8DO's ARRL Handbook excerpt
Message-ID: <Pine.3.89.9606251756.A4817-0100000 at newman.egh.com>


re: An alternative to the 15 inch spark coil was an oil immersed 1/4 kilowatt
    transformer and a battery of Leyden jars; with this combination 100 miles
    was guaranteed.

Talk about the good old days!  I bet nobody had any trouble holding their
frequency (...or actually frequencies...) with that little contraption!

73,
Dave Clemons K1VUT