Preface to the lecture, 1

620

 

AM temple technology

 

 

Diameter bigger circle D

1

= 22 m (6,8 MHz),

 

small circle D

2

 = 11 m; und L = D

1

 + 1/2 D

2

 = 27,5 m (5,5 MHz)

 

 

Fig, 30.7:     Temple of Venus and Roma; Rome 136/37 A.D.

 

:   A. Springer: Das Altertum, A. Kroner Verl. Leipzig 1915, 10. Aufl., S. 518 

: T. Kraus: Das romische Weltreich, Propylaen Kunstgesch. Berlin Bd. 2, S. 161 

: Lamer: Worterbuch der Antike, Kroner Verl. Bd.96 unter "Tempel", Haufigkeit

 

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Scalar wave technology in antiquity

 

621

 

30.7 AM temple technology

 

The low-frequency signal (LF), which should be transmitted by a transmitter with 

amplitude modulation, lies in the range between 16 Hz and 16 kHz. If it only concerns the 

transmission of speech information, then the bandwidth can be reduced to 300 to 3000 Hz. 

In the case of mixing the low-frequency useful signal with the HF-carrier, thus in the case 

of the modulation of the carrier in the rhythm of the LF, two side bands arise. These lie 

close to the carrier frequency and are formed from this once by the addition and once by 

the subtraction with the frequency of the LF-signal. Let's take the temple of Venus and 

Roma with a transmission frequency of 6.8 MHz. If sound of 3 kHz should be transmitted 

clearly understandable, then the dimensions of the Cella had to be varied for just 8 mm for 

a corresponding Cella length of 

 = 22 m. As a curiosity the niches in the side walls in 

the case of this temple however allow a considerably larger bandwidth of more than 10% 

instead of the necessary 0.04% in the case of AM.

 

In the case of the Greek originals, the Cella however has smooth walls, from which 

follows that the temples were designed ideally narrow band. The Greeks apparently 

operated predominantly telegraphy transmitters, for which the side bands coincide with the 

carrier.

 

The argumentation indeed has remained unchanged: The modulator being narrow band 

and simple to realize speak in favour of the telegraphy being the "original form" of all 

modulation techniques. Also the rediscovery of the broadcasting technology by Heinrich 

Hertz succeeded as telegraphy signal. In addition the range is bigger than for any signal 

modulated with sound frequency.

 

As the calculation example has shown, also pure AM transmitters work very narrow band, 

and this is particularly important for low transmission frequencies, if many transmitters 

want to use the favoured SW band between 3 and 10 MHz at the same time. With AM one 

thus accommodates the maximum number of broadcasting channels in a particular 

frequency range, for instance the 80-meter band, without these interfering with each other 

too much. But that also was badly needed. Conclusions about the everyday life of 

broadcasting in antiquity by all means are possible because of the enormous number of 

temple installations, which logically were permanently used. Only in Rome there existed 

up to 200 temples

!

 

Who goes in search of broadcasting stations with a modern short wave receiver, for 

instance in the 80 m band between the countless telegraphy transmitters, fast gets an idea 

of what had been up in the air already 2000 years ago. No ancient city would build several 

temples on a single Acropolis, if only one single one could have been used. All temples 

broadcasted with each time another carrier frequency because of different dimensions. For 

this reason the temples, which stood side by side, as a rule were dedicated different gods. 

An acknowledgement, "the air just being free", in addition hardly was possible, because of 

the often-found spatial distance between the temple installations and the respective oracle. 

Between the transmitter of the god Apollo in Didyma and the receiver, the oracle of Milet, 

for example lie approx. 20 kilometres. The only possible conclusion is that in antiquity 

there was broadcasted on all channels simultaneously regardless of other gods and their 

transmission frequencies. As is well-known there rather prevailed a situation of 

competition between the gods, since like today a large number of listeners meant great 

importance, influence and power and eventually also worship, more gifts and more 

receipts from broadcasting fees.

 

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622

 

Modulation of acoustic signals

 

 

Fig. 30.8: ____ Comparison of a magnetron (A), a microwave radio

 

tube

  and the  temple  (B)  in  the palace  of the 

emperor Diokletian, Split.

 

 

Fig. 30.8.C:     Temple of Minerva Medica, Rome, 320 A.D.

 

:     K. Simonyi: Physikalische Elektronik, 8.4 Das Magnetron, S. 665

 

:    T. Kraus: Das rom. Weltreich, Propylaen Kunstgesch. Bd. 2, S. 194, 196

 

:   If one however wants to verify this, in antiquity already common manner of 

PM broadcasting technology, then we need a broadband short wave receiver 

with  phase-demodulator.   With   such   a  receiver  even  today  any   time a 

conclusive      argumentation      should      be      possible      that      this      sort      of      SW-PM 

technology actually works.

 

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