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OV1RR Denmark flag Denmark

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                                                                                                                                      Please Click on Top picture to enlarge  !

                                                                                                                                        (  Mathematics for Radio Technicians  )

                                                                 Ladies and Gentlemen :

Thank you for visiting this page.  We are a Regional Radio Museum located in a small city called Ringsted, only some 60 km west south west of our capital Copenhagen / Denmark, on IOTA island EU-029 - Sjaelland.    Please be patient, our license is new, from August 2017, and so is our page, which will still be under construction and revisal for some time.

                                                                     <     Ham Operator looking for DX     >

               Amateur Art in Electronics                                                                                       

Our Museum is mainly specialized in radio, sound, video and other instruments, which have been produced by manufacturers in Denmark, but also include a great number of foreign equipments.   We have in our possession between 5.000 and 6.000 fine instruments.  For years, we have many radios on display for interested visitors, but have never had a real live and active radio station to bring us on the air once in a while.  This is now our idea.      The supporter group of Ringsted Radiomuseum also include aprox. 100 engineers, electronic teachers and preachers, radio tecnicians and radio mecanics.  They are all mostly retired personel, but some of them do a very fine weekly job to make almost all displayed instruments shaped into original, workable units.   We dispose of 3 fully equipped work benches for repairing on most of our instruments.   Our fine equipments have often been lent out to Danish National Television, Film companies or others for historic relating. 

Although taste and interest varies enormously, we will try to pick out a few photos to bring to this page.  But, anyway, where ever you live, being it on the borders of, or inside Denmark,  in New Zealand, Brazil, USA, Siberia or elsewhere, whenever you come to Denmark, please consider making this Radiomuseum a visit.  You will be surprised.


Curiousity :   A short time ago, a visitor appeared with a reel full of wire.  Did we happen to know what this could eventually be ?   Oh yes, probably a steel wire recording.  But please, no great expectations. If the wire had been recorded upon, it could most probably have lost any sign of signals over the many years.  Wire recordings were used over a number of years, but were outphased in the 1950's, being substituted by magnetic tape recordings.  

      Well, for the visitor with the reel of steel wire.  It turned out to be a fully one hour steel wire recording in fine quality, made in 1956 by one of his relatives, when serving military duty on a US Air Base in Greenland during the cold war period.  This was the year that the great invasion of Hungary took place.  The family never managed to hear the content, due to lack of a wire player, but kept the curious reel for 61 years.  Only now being able to listen to the wire at our Museum, and having it converted to cd, this gentleman also signed up with the Museum's  support group. Wire recorders used 0,1 millimeter steel wire and had 2,2 kilometers of wire on a small reel, running at a speed of 60 cm per second. Reel capacity was aprox.1 hour.

A saying goes, that Hitler often used wire recorded speaches, but insisted they should always be announced as live speaches. As wire recordings could oscillate slightly in volume, and therefore be detected as such, Hitler ordered German industry to invent and produce recording methods with sound and volume qualities equal to live speach. The very first German tape recorders were invented and used just before and during the 2nd world war, and were kept rather secret for a number of years.   They used paper-acetat with magnetic coating, perfect but easily breakable, and permitted "live-like" recordings to be sent every day all over the country, and  be transmitted with short intervals, organized and announced to give the impression that he himself in person was all over the country every day.   Our Radiomuseum has copies of different wire recorders and also of the very first German 1937 paper-acetat AEG Magnetofone recorder.


       Steel Wire recorder                                                                                            Paper-Acetat recorder


                              By the way    -    Do you like a HOT SHOWER    ?                       here is how !


This was one of the 4 Final Stage Tubes of the former 40kW Danish Copenhagen-Herstedvester medium-wave transmitter.  It also transmitted directional short-wave programs mainly for Danes living and working worldwide, using 50kW.   As these tubes were water-cooled and capable of warming up the water quite nicely, some clever employees at that transmitter quickly hooked up the necessary water spraying-head. It may probably still work fine, h i .


Valdemar Poulsen Stamp - 1st Day Cover                                      H.C. Ørsted Stamp - 1st Day Cover

Danish inventor, Dr. Valdemar Poulsen 1869 - 1942, took out a worldwide patent in 1898 for his socalled Telegraphone, and in 1902-04 for inventing the lightbow generator. Together with Danish inventor P. O. Pedersen, he invented a system for radio telegraphy using continuos waves, and in 1906 presented a practical form for radio telephony. His discoveries were one of the bases for the invention of radios.  In 1909 his was nominated Dr. Phil.h.c. by the University of Leipzig, Germany.

H.C. Ørsted was a Danish Physician and Chemist. In 1820 he discovered and registered the Electro-Magnetism. He also discovered the Aluminium.



RecognitionAs the responsible for our Ham radio station OV1RR, for this QRZ-page and as QSL manager,  I feel important to mention Mr. Bjarne D. Nielsen, President and principal initiative taker and a daily hard worker for Ringsted Radiomuseum over a number of years, as well as his dear wife Mrs. Marianne, helping out on solving problems and  ' background noise'.  He was for many years an electronics professor at our Regional Electronics High School.  His many good ideas, fine contacts and good example for all of us, has brought the Museum to its present high standard, with the continued daily help of members from the Museum's  great and fine supporter group.  You are also welcome to consider becoming a supporter or co-sponsor, if you like our work.

                                                                 <       Ham Operator after Contest ,  -  needing  Oxigen         >


                                                                                        Museum's  3 live workbenches      

QSL Info :      We qsl via eQSL (AG), via LoTW and QRZ.com, and are planning for paper via Bureau.   Please be patient, as our paper cards have not yet been ordered, nor designed.             On the cluster DX Summit you may see announced, when our station OV1RR is active.  And, you are always  welcome to make us a personal visit, when coming to Denmark. -

Thank you.

OZ1HHH - Chris   ( on radio ),  - Operator

Preben Mailand Christensen, - OZ1HHH - OZ1D - PY2ZZZ - ex  C5AC - PY2ZDC - PY9ØIARU - etc

                                      -   This page was designed, and is edited regularly by  OZ1HHH   -

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