PA3CLQ's Leuke Linken Nr. 454
Beste mede amateur,
Dear fellow amateur,
In deze mail staat een link waarop het dertigste DKARS-Magazine is
te downloaden.
This mail contains a link which
the 30th- DKARS-Magazine is available for download.
De Dutch Kingdom Amateur Radio Society is een stichting die de
belangen wenst te behartigen van ALLE radioamateurs binnen het gehele
Koninkrijk der Nederlanden.
The Kingdom Dutch Amateur Radio Society is an organization that seeks to represent the interests of ALL radio amateurs throughout the Kingdom of the Netherlands.
De DKARS doet niet aan copyright en het staat
een ieder vrij om deze link aan zoveel mogelijk radiovrienden door te sturen.
The DKARS does not copyrighted and any
person shall be free to forward this link to as many radio friends.
DKARS Magazine verschijnt 1x per maand en wij
stellen het uiteraard op prijs als je ook (radio amateur gerelateerde)
bijdrages wilt leveren.
DKARS Magazine appears 1x per
month and we obviously appreciate it if you (related radio amateur) to provide contributions.
Namens de Dutch Kingdom Amateur Radio Society wens ik je veel leesplezier nadat
je op deze link hebt geklikt:
On behalf of the Dutch Kingdom Amateur Radio Society, I wish you pleasant reading after you click on this link:
http://downloads.dkars.nl/DKARS%20Magazine%20201701.pdf
Wil je in plaats van een PDF te downloaden
het Magazine on-line doorbladeren?
Dat kan ook, ga dan naar deze link:
Want to download the magazine browsing on-line instead of a PDF? This can also go to this link:
https://issuu.com/pj4nx/docs/dkars_magazine_201701
73 namens de DKARS
Peter de Graaf
PJ4NX en PA3CNX
Secretaris DKARS
Code Practice Machine????
The Wirechief just got an email from someone asking about what they think is their grandfathers code practice machine.
Although I have seen many different code practice machines, this one is new to me.
I'm attaching a photo that she provided.
Can anyone expand on any information on it?
73, Chris Hausler
REM :
Chris,
That almost looks like the inside mechanism of a wind-up (non-electric) Instructograph was mounted on a board with a key and sounder.
I haven't seen anything like that.
73, Chip
REM :
Hi Chip,
Well it is certainly a wind-up mechanism but the rest of it doesn't match the Instructograph.
The photo shows what appears to be a square pin sticking up just about where the end of the tape is in the photo and as it appears that the spring is underneath this, it would appear that this is where a crank or key would be put on the pin to wind up the spring.
The crank for the Instructograph was threaded and went into the side of the unit.
See this link for photos of an Instructograph including some of the wind-up motor:
http://technitoys.com/gallery/instructograph-vintage-code-training-device/
The tape shown only has one strip of code on it instead of two "sides" like the Instructograph tapes.
As I told the women asking the question, there were many such code practice machines made back in the "daze".
73, Chris Hausler
REM :
I think I know what that machine is, but before I say anything more, does anyone know if the tape is the same width as Instructograph (which was the same width as standard teletype tape).
I believe this is narrower tape, know as "Wheatstone," and if so, I know the mfr of that machine.
RSVP somebody? // Dave dt sprau
REM :
Hi Dave,
I have asked her this question and will get back to you with her response.
Most all of my paper tape daze where with the 8-level one inch stuff, not the 5-level 11/16 inch stuff although I did use on early vacuum tube computer, a Bendix G-15, which did use this size tape.
Anyway, she sent me some additional images.
I've attached a couple.
73, Chris Hausler
REM :
Chris,
To add more to the mystery, I looked closer at the sounder in this machine and it appears to be the same as the legged sounder that posted about over a year ago.
The sounder had no makers mark and those who replied to the post had not seen a sounder like either.
It appears maybe my sounder may have come from a machine such as this.
I have attached a photo of my sounder.
73,N0PME Joe Fehrenbacher
REM :
Hi Joe,
The sounder on that code practice machine does not have the leg connections yours has, the wires just come through the base.
Also, and this surprised me, the code practice machine was sold by the Dodge Institute.
I had not been previously aware that Dodge sold practice sets.
It is advertised on pages 304, 305 and 306 of the 1911 edition of Dodge's "Telegraph Instructor" book.
I've attached .pdf's of these three pages.
It apparently had the name, "National Automatic Telegraph Transmitter" and you could buy one from Dodge for $20 although it is not clear whether Dodge manufactured them or just bought them from someone else.
The women who questioned me about this instrument had it restored and just got it back.
I've included a photograph she just sent me.
I told her she still needed to get the lever for the key :-)
She also mentioned that the restorer told her that the instruments were marked MESCO (Manhattan Electric Supply Co.) but I haven't found any such code practice device in a MESCO catalog that I've seen so likely the manufacturer just bought MESCO instruments for the unit.
73, Chris Hausler
See attachment pse
Editor
REM :
Hi Les,
Actually the owner of the code practice device figured this out.
In an attempt to further educate her on how such machines would be used I talked about telegraph schools and home study courses for such training and of course mentioned the Dodge school and his book as it's probably the best known.
She went rummaging through her grandfathers stuff and found the 1911 edition (which is about the time she said he learned) and then went through it finding those pages.
I have an almost pristine copy of the 1911 edition but had not looked at it in a long while.
So the credit for the research goes to her.
(because I usually sign emails with 73, she
asked about that too so she now also knows about the W.U. 92 code as well :-)
73, Chris Hausler
Can anyone tell me if Athern Repeaters were used only on multiplexed lines or were they also used on simplex lines?
I am trying to build a demonstration set of telegraph instruments.
They will be used to demonstrate telegraphy to the public and especially students.
We have a science day coming up locally and i would like to include a simple bidirectional repeater if that is practical.
The challenge is that not being a telegrapher retiree myself I do not know which types of equipment were used for which use.
If anyone can offer any guidance on the repeater issue I would appreciate the help.
Tom Horne
REM :
The Athearn repeaters were strictly “single line” repeaters intended to tie one neutral Morse circuit to another.
An absolutely elegant device.
I am fortunate to have one in operation here at FB office.
They coul be used to connect a receive or send leg of a dux or quad to a single Morse circuit for “one way” service in either direction.
Ed FB
REM :
Hi Tom,
To my knowledge, the Athearn repeater is just a single line repeater.
It would not work on duplex lines and was normally used on simplex lines.
It is possible that it might work on time division multiplex lines if the rate of multiplexing was not too fast but I have never read or heard of such a thing.
(That said, I could be wrong :-)
There's lots of information about the Athearn repeater on the net.
To see more go to:
http://www.telegraphlore.com/instruments/athearnrptr/athearnrptr.htm
The MTC used to run an Athearn repeater between wire 11 on MorseKOB and the US dial-up hub.
You can see a video of it in operation being demonstrated by our president, Jim Wades here:
https://www.youtube.com/watch?v=_l8FpKK37cw
73, Chris Hausler
REM :
See eventual PLL Nr.451
Editor
What is the date for Morse Day 2017?
I thought it was Thursday, April 27.
https://www.daysoftheyear.com/days/morse-code-day/
73, John, N5DWI
REM :
Well, the 27th is Morse's birthday, but for the convenience or our members, the MTC celebrates it on the last Saturday of April which is always the Saturday nearest to Morse's birthday.
And of course we use the original Morse Code not that new fangled European code once called "Continental" but now known as International Morse.
73, Chris Hausler SlowSpeedMorseGroup
Single letter CW beacons have been rumored to be Russian in origin.
Here's a url that might help:
https://en.wikipedia.org/wiki/Letter_beacon
There's also a cluster of them around 7033-7035 khz which are heard worldwide.
They are all over the HF spectrum.
Best regards, Gary, K7EK
The Art And Skill Of Radio Telegraphy by William G. Pierpont N0HFF
Hello,
For an excellent guide on learning and improving your CW skills, go to:
http://n1su.com/contents.htm
73, Sam Neal N5AF
73, from the town at the rivers "De Bergsche Maas" and "De Dongen" Geertruidenberg (800+ years city rights) at: 51.702211N 4.853854E
Your Editor Jan Pieter Oelp PA3CLQ
-30-
My simple website about Gigantic DF-Antennas
Part 1 "DF-Antenna Wullenweber Array"
Part 2 "DF-Antenna USSR Variants"
Part 3 "DF-Antenna USA Variant"
Next Part 4 "USSR OTHRA DUGA 1,2 & 3" at: