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Saba Meer…

27th 5月 202327th 5月 2023
by giovanni

Also this reviews will be accompanied by a section with graphs of technical measures of the most important parameters.
There is no such thing anywhere else, as far as I know. Not even the manufacturers themselves detailed the technical features of their own devices at this level.
This new section has been developed for an objective comparison of different devices.
In order to avoid interpreting the measurements incorrectly, it is very important to read the warnings carefully the first time.

The Meersburg is one of the most prestigious models produced by Saba. The version that we present in this review has been modified in order to maximize the performance of this device.

The low frequency stage is an excellent example of a class A amplifier, with an EL84 with well known sonic characteristics.
The feedback is moderate, so the resulting sound is very open, with great presence in the mids and trebles and sufficiently damped bass.
The cabinet is very robust and free from vibrations and resonances.
There are no equalizers or filter circuits that could introduce distortion or blurring of the sound.
In short, the first models of Saba Meersburg represent an ideal basis for an upgrade.

The weak point is represented by the loudspeaker system, and it is precisely the section on which we have worked around.

The speakers:
The larger of the two, a huge SABA 1675U10 with TIGGES Permadyn magnet in Alnico measures 35 x 24cm.
It is a loudspeaker built starting from 1953, with a magnet with a flux density of 8000 Gauss, an impedance of 4.1 Ohm and a voice coil of about 25 mm.
It has a frequency response that extends from 55 to 10,500Hz within +/-3dB.
The entire frequency range is sent to this loudspeaker and the high part is cut mechanically.
The cone, despite being very large is relatively light, this property allows you to have bass that are very ready, really powerful and without tails.

In our opinion, the original 5330F15 electrostatic tweeter is too inefficient compared to the large oval mid-woofer and above all it has a too high cutoff frequency. It begins to feel starting from 9600 Hz, and at a level that is too low anyway. It works therefore as a supertweeter rather than a tweeter.
This loudspeaker is placed in front of the full-range, almost in the centre. This arrangement (if it were placed right in the centre) would in our opinion be the ideal arrangement, see Goodmans Triaxiom, Altec Lansing Duplex and so on, because it allows very precise focusing of the sound image. However, since the mid-high frequencies emitted by the full range are concentrated right in the central part of the cone, the treble is mechanically hindered by the electrostatic loudspeaker placed in front.
The end result is a sound that tends towards gloom and with some unpleasant reflections as the electrostatic tweeter is not placed exactly coaxially with the mid-woofer.

We fixed these issues with two essential changes:
1 - Replacement and correct placement of the original tweeter with a Saba 5238U8 cone tweeter
2 - Made the frame with the front canvas removable

1) The Saba 5238U8 cone tweeter has a diameter of 112 mm, is equipped with a 7500 Gauss magnet, a very light 12 mm voice coil and an impedance of 5.1 Ohm.
The frequency response starts already regular from 1500 Hz and rises up to about 13 kHz, and then returns to decrease towards 20kHz.
Remember that all acoustic musical instruments that reach higher are the cymbals (Cymbals) that reach just over 10 kHz.
The efficiency of the tweeter and its low cut-off frequency compensate for the mids and trebles generated by the central part of the rear mid-woofer which are absorbed by the shadow cone of the tweeter itself.
The tweeter is positioned exactly in the center of the mid-woofer, in a perfectly coaxial position, thus avoiding the annoying reflections generated by the misalignment of the original electrostatic tweeter, maintaining the invaluable advantages of coaxial speakers.
Finally, the crescendo response curve up to 13 kHz means that the treble is really very bright.

2) The front canvas covering the speakers is never completely acoustically transparent.
For this reason, the only way to obtain maximum performance from the appliance is to eliminate it.
We built a dummy frame into which the original canvas was installed. This frame attaches to the speaker panel with magnets.
In this way it is possible to detach it when you want to listen to music with maximum transparency and put it back in its place when the radio is at rest to protect the loudspeakers from dust and to restore the original aesthetic appearance of the unit.

All this translates into exciting dynamics, brilliance of sound, lack of oscillation of the canvas in the presence of low frequencies, making listening to this beautiful device very realistic and pleasant. With a pinch of eccentricity.

The first track is Nobody Knows You When You're Down and Out performed by Bessie Smith. At the end of the WWI, the United States economy restarts strongly, a period of abundance begins, the Roaring Twenties. Written by pianist Jimmie Cox in 1923, after several interpretations and modifications to the original text, it was interpreted by Bessie Smith in 1929. The text speaks of the fortunes made by someone during the Prohibition era and highlights the precariousness of material wealth and interested friendships that result. On October 24, 1929, the collapse of the New York Stock Exchange will bring about the greatest depression that the United States and parts of the rest of the world have known.

This year Napoli won the Scudetto, so there was bound to be happy Neapolitan music. The second piece written by Umberto Bertini and set to music by Vincenzo Di Paola and Sandro Taccani Chella 'llà was one of Renato Carosone's fortes. The song tells of the joy of a man who manages to free himself from a relationship that caged him and who is savoring freedom. The song begins with a speech to become playful and catchy as only the Neapolitans can do.

The third piece performed by Dizzy Gillespie, the famous Tin Tin Deo was composed together with Gil Fuller and Luciano "Chano" Pozo. A thunderous opening that later transforms into a Latin rhythm and then returns explosively with the trumpets sliding towards swing. His style that combined entertainment and musicality has encouraged the spread of bebop. Gillespie's solos were breathtaking. Certainly a giant of Jazz.

The fourth piece is the Adagio for oboe in D minor by Alessandro and Benedetto Marcello. It is an interesting piece because it is a classic example of baroque with a musical theme adorned with flourishes. The flourishes are recognized above all in the repetition of the opening motif where the virtuosity and musical sensibility of the singer or performer could be expressed. Johann Sebastian Bach transcribed a harpsichord version of Marcellus' Adagio (BWV 974)

The fifth song is the very famous The River by Bruce Springsteen. Springsteen himself called this song "a revolutionary song". He himself also stated that he drew inspiration, in the lyrics, from a 1950 song by Hank Williams "Long Gone Lonesome Blues". The song recounts a conversation between him and his wife's brother. After losing his construction job, he worked hard to support his wife and young son, but he never complained. In Pittsburgh on September 22, 1984, he dedicated the song to Pennsylvania union leaders.

BLUETOOTH

Bluetooth receiver embedn

MULTI PLATFORM CONNECTION

Each radio is equipped with a cable for connection to any digital device.n

Bluetooth receiver embed – The unit is equipped with a BLUETOOTH receiver powered directly by the receiver power supply. This makes it possible to control the amplifier from any external digital device as an IPAD, a Smartphone, or a sophisticated multimedia station. So you can hear your preferred web station or your lossesless file without cables on the room. Wireless Receiver can be equipped upon requests.

– Multi Platform Connection – A customized adaptation cable to connect any digital device as Iphone, Smartphone, Laptop, CD Player etc. will be provided with this radio. This special cable suits the different impedances between the modern equipment and the receiver. Furthermore the two stereo channels flow into one without increasing the load to the input unit.

SABA is the acronym for Schawarzwälder-Apparate-Bau-Anstalt meaning engineering institute of Technological appliances of the Black Forest.

The company was founded back in 1835 by Joseph Benedikt with the initial name of Jockele-Uhren, but only in 1923 the production of radio devices began and the company went under the name of SABA.
Toward the end of the 20s SABA became famous with the well-known S35 and in the following years it became the second German producer after Telefunken. During the war SABA produced military equipment and in 1945 the company was completely destroyed by a bombing.
In 1947 the production of radio devices began again and SABA distinguished itself immediately for ist avant-garde and high- quality production.

hey also began to produce TVs (the first PAL color TV is a SABA), house appliances and medical equipment. Many Italians used to work there. The Alnico Greencone loudspeakers became popular for their linearity, power handling, constant impendence that would be employed in each Hi-Fi devices of that time.

The radio devices with motorized tuning became popular as well and SABA became the representative German brand meaning quality, reliability and detailed precision. In the 1970s the decline began. According to specialized magazines of that time not having a Japanese device at that time meant not having Hi-Fi. In the 80s Thompson took over SABA. In the 90s the other way around, having a Japanese device of the 70s meant not having Hi-Fi. They found out that they functioned with a 96% counterreaction and that a device with 0.001 db from 1 to 100 KHz extension did not necessarily sound good.

We do not trust our ears and we do trust what other people say not necessarily with a good purpose.
2007: due to insolvency SABA disappeared from the TLC (Chinese) and Thompson (French) joint venture, and SABA ceased to exist.

MEASURED TECHNICAL FEATURES

IMPORTANT REMARK
(to be read carefully at least the first time)

The following measures have been carried out in order to compare, from an electrical point of view, the devices that will be reviewed on this site. It is not possible to make comparisons with measurements made by other laboratories on different devices. The instrumentation and measurement conditions are probably very different.
The instrumentation used for the measurements is obsolete and unprofessional. We believe that more precise instrumentation is not necessary due to the tolerances of the human auditory system. Distinguishing a distortion of 1% from one of 1.1% or 1.001% only makes sense from the electrical point of view. Probably no one can hear the difference by ear. Only a child and very few lucky people can perceive the difference between a flat response curve up to 16 KHz and one up to 20 kHz.
The perception of sound depends on many factors, namely the age of the listener, the listening environment, the musical genre that is being reproduced, the listener's expectations, his or her listening habits and knowledge and many other factors, besides of course the quality of the other devices. Therefore, there is no direct and unique relationship between the results of the measurements made and the pleasantness of listening to a specific device.

BANDWIDTH

Normally the measurement of the bandwidth is done on a resistive load. Therefore, the deformation caused by the loudspeakers' inductive load and the effect of the mechanical resonance of the speakers themselves on the feedback circuit are not considered. The effects are by no means negligible, the measurements carried out on a purely resistive load are always very linear but they don't coincide with the real frequency response.

On the other hand, this response curve was measured on an inductive laod, that is, with its own loudspeakers.
The frequency response measurements were made with a sinusoidal generator and a Wandel & Goltermann WM – 20 level meter.
You can see the actual frequency response on the vobulator' screen.

Inside the cabinet there is a dipole for FM reception and a ferrite rotating aerial for AM reception.
Ferrite aerial can be rotated from the outside to achieve a perfect tuning of the device in the AM.
In this picture you can see the rotation mechanism, and the aerial position indicator.
The reception sensitivity with internal aerials is very good. This unit was in fact produced when there were not many radio stations, and those available were far from each other.
Using an external aerial sensitivity is further increased.

german radios - cn

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Nordmende…

16th 3月 202316th 3月 2023
by giovanni

Nordmende Tannhäuser 59

Tannhäuser, nato in una famiglia di cavalieri di Salisburgo, partecipò forse alla sesta crociata del 1228 e fece quindi una vita errante come poeta e cantore. Frequentò la corte di Vienna del duca Federico II.
Secondo una leggenda, nella sua vita Tannhäuser trova il Venusburg (monte di Venere), il regno sotterraneo di Venere, e vive con lei per un anno. Lascia quindi la dea pieno di rimorsi, e intraprende un viaggio fino a Roma, per chiedere perdono al Papa Urbano IV. Il papa gli ricorda che tale peccato porta alla dannazione eterna, e gli promette perdono solo in caso di miracolo: la comparsa di fiori nel suo bastone. Tre giorni dopo Tannhäuser torna a Vienna ed il bastone fiorisce.

La leggenda è stata quindi messa in musica da Richard Wagner con il suo Tannhäuser.

La Nordmende, ai tempi del suo massimo splendore e sviluppo tecnologico volle chiamare Tannhäuser il suo apparecchio più bello mai prodotto.
Un apparecchio studiato per rappresentare il massimo della perfezione tecnica del tempo e costruito con cura maniacale.
Lo stadio finale è composto da una coppia di EL84 in Push-Pull. L'inversione di fase veien effettuata con una sezione del doppio triodo ECC82 in configurazione Cathodyne. Questo tipo di invertitore ha il vantaggio di poter essere collegato direttamente allo stadio precedente.
Tale stadio è costituito dalla sezione rimanente del doppio triodo ECC82 che provvede ad amplificare il segnale dopo l'attenuazione derivante dal circuito del controllo di toni.
Il triodo contenuto nella valvola multifunzione EABC80 costituisce il preamplificatore di ingresso e riceve il segnale da un potenziometro logaritmico con 3 prese intermedie per un complesso ed accuratissimo circuito di controllo fisiologico di volume.

La sezione radio è di altrettanta elevata qualità. E' presente uno stadio di Media Frequenza supplementare allo scopo di aumentare la selettività.
Questo permette una ricezione delle trasmissioni, particolarmente in Modulazione di Frequenza, particolarmente stabile ed esente da disturbi.

Il complesso di altoparlanti è poi veramente imponente. Tutti gli altoparlanti sono di costruzione Isophon.
La riproduzione delle basse e medie frequenze è assicurata da un grande woofer ellittico P 2031/19/105 che misura 31 cm di lunghezza e 20 di altezza.
Agli acuti sono dedicati invece ben 5 altoparlanti costruiti con 3 tecnologie diverse.
Frontalmente abbiamo il medio a cono da 13 cm per una riproduzione morbida e perfettamente integrata con quella del woofer.
Su ciascun lato è stato posto il famoso tweeter a cono HM 10/12/70 ed un tweeter elettrostatico ST HB7.

Come scrisse Baudelaire il Tannhäuser rappresenta la lotta dei due princìpi che hanno scelto il cuore umano come principale campo di battaglia, ossia la carne contro lo spirito.
La Nordmende rese onore a questa grande opera realizzando il suo prodotto migliore.

BLUETOOTH

Ricevitore Bluetooth integrato

CONTINUA >

PIATTAFORMA MULTICONNESSIONE

Ogni radio viene equipaggiata con uno speciale cavo che permette la connessione con qualsiasi sorgente digitale.

- Ricevitore Bluetooth integrato - Questa unità può essere equipaggiata con un ricevitore BLUETOOTH alimentato direttamente dall'apparecchio Questo rende possibile usare l'amplificatore da qualsiasi dispositivo digitale esterno, come IPAD, Smartphone, o sofisticate stazioni multimediali. Potrete ascoltare le vostre Stazioni Web o le vostre musiche preferite senza cavi in giro per la stanza. Su richiesta è possibile anche montare un Ricevitore Wireless.
- Piattaforma Multi Connessione - L'apparecchio viene fornito di un cavo di adattamento che permette di collegarlo a qualsiasi dispositivo digitale come A Iphone, Smartphone, Laptop, CD Player etc. Questo cavo speciale permette di adattare l'impedenza tra l'apparecchio ed i moderni dispositivi. Inoltre i due canali stereofonici vengono fatti confluire in un unico canale monofonico senza incrementare il carico dell'unità sorgente.

Nel 1923 Otto Hermann Mende fonda a Dresda la Radio H. Mende & Co. Dopo i bombardamenti della fabbrica nel 1945, Martin Mende (figlio del fondatore) crea una nuova società a Brema la North German Mende Broadcast GmbH . Il cui nome viene successivamente cambiato in NORDMENDE.
Negli anni 50 e 60 diventata uno dei produttori tedeschi di radio e TV di maggior prestigio della radio.

Negli anni 70 i televisioni NORDMENDE diventano famosi per i loro telai a schede e per il test rigorosi e controllo di qualità dei prodotti finiti. Ma i costi elevati di tanta qualità si rivelano uno svantaggio competitivo quando il prezzo di televisori a colori ha cominciato a scendere.

Nel 1977 una partecipazione di maggioranza viene venduta ai francesi di Thomson. L'anno seguente, la famiglia vende le azioni rimanenti. Nel 1980, le fabbriche di Brema viene chiusa, NORDMENDE diventando puramente un marchio di proprietà Thomson.

Fonte - Wikipedia

Grazie a Dan Ludington per la foto.

L'apparecchio è stato dotato di un sistema di correzione della risposta in frequenza indipendente dai controlli di tono.
E' composto da 6 tasti che inseriscono curve di equalizzazione predefinite operanti sul circuito di controreazione (non sono filtri passivi).

Il tasto Bass enfatizza i toni bassi.
Il tasto Sprache enfatizza i toni medi per un ascolto più pulito di trasmissioni parlate.
Il tasto Expander (quello grande centrale) inserisce una curva di controreazione che favorisce leggermente i toni medio bassi aumentando il senso di spazialità.
Il tasto Solo accentua leggermente i toni medi per favorire l'ascolto di strumenti singoli.
Il tasto Jazz enfatizza molto i toni bassi ed alti per favorire l'ascolto di questo genere musicale.

Il sistema di controllo dei toni è molto efficiente. Sopra le grandi manopole dei controlli di tono, separate per alti e bassi, troviamo due finestrelle separate che si illumina progressivamente di bianco indicando l'enfasi data alla banda su cui agiscono.
La manopola del controllo degli acuti è collegata alla ferrite nei trasformatori MF e ne fa variare la pendenza della campana del trasformatore stesso. In tal modo, quando si è nelle bande AM, si accentuano ulteriormente i toni acuti già prima dell'arrivo nello stadio amplificatore BF.

Sopra la scala, nel pannello altoparlanti troviamo la serie dei tasti del Bandbreite Schltbar illustrata in precedenza.
Scendendo sulla scala parlante, si trova prima di tutto l'occhio magico che indica la perfetta sintonizzazione di ciascuna stazione.
Sotto si trova il comando del volume (con loudness incorporato).
Tirando la manopola del volume si inserisce il circuito che aumenta la selettività nelle bande AM.
Partendo dall'alto sono indicate poi la scala AM per le Onde Lunghe, Medie e Corte, sotto troviamo la scala FM.
Proseguendo verso destra si vede l'indicatore della posizione dell'antenna in ferrite.
Vi è infine la manopola della sintonia, il cui movimento è molto piacevole essendo supportata da un grosso volano.
Coassiale alla manopola di sintonia c'è la manopola per ruotare l'antenna in ferrite.
Sotto da sinistra troviamo la manopola del controllo degli acuti immersa in un piacevole alloggiamento di bachelite con effetto avorio.

german radios - cn

Philips S…

21st 11月 202221st 11月 2022
by giovanni

The Philips Saturn 653 / 4E / 3D is the second most important model of the house in 1955, and in the intentions of the manufacturer aspires to be one of the most popular models of all German production for the innovative technology used.

As a matter of fact, they met their goal and produced a unique piece of technology, for both the German and World Wide market.
It’s peculiarities are:

4 power tubes (2xEL84 and 2xUL41)
Dedicated amps for Hi and Low frequencies
An Iron-Free coupling output (OTL)
High Damping Factor with Negative Feedback circuit
4 High impedance speakers

The Philips Saturn 653 / 4E / 3D has dimensions in line with the top models, but it’s woodwork, frames, and speaker covers contribute in giving it a much sleeker, eye-pleasing look to complete any furniture display.
The Low frequencies are particularly deep thanks to the separated OTL amplifiers and to the impressive size of the subwoofer, approximately 21cm in diameter (more or less 8.3 inches).
Exactly the same as for the Capella 753/4E/3D model I suggest making good use of the mid-tweeter, as this successfully crafted speaker (17 cm in diameter) makes the mid and Hi frequencies pleasant and true to life, especially if seated in front of the Machine.

High and Mid Frequencies sections
The FM group is of the variable permeability type. It has a high amplification and stability.
Being equipped with an automatic noise suppressor in the presence of signals below 1.7 V, the output is muted to avoid hearing rustling and noise when searching for stations.
The de-emphasis circuit is set to 50 uS, valid all over the world except for the USA and South Korea. In these countries, the filter should be increased to 75 uS.
The AM section is equipped with a rotating antenna for the OM and OL bands. The antenna can be controlled by a knob on the front.
The mid-frequency sections are composed of three separate filters for AM and FM. The first of these filters is adjustable. The second is the amplifier filter and the third filter further increases the selectivity of the device.

All the listed solutions translate into a very low distortion, an increase in power, and a pleasantness of use hardly ever obtained in other appliances.
This is the Philips Saturn 653/4E/3D

BLUETOOTH

Bluetooth receiver embed

MULTI PLATFORM CONNECTION

Each radio is equipped with a cable for connection to any digital device.

- Bluetooth receiver embed - The unit is equipped with a BLUETOOTH receiver powered directly by the receiver power supply. This makes it possible to control the amplifier from any external digital device as an IPAD, a Smartphone, or a sophisticated multimedia station. So you can hear your preferred web station or your lossesless file without cables on the room. Wireless Receiver can be equipped upon requests.

– Multi Platform Connection – A customized adaptation cable to connect any digital device as Iphone, Smartphone, Laptop, CD Player etc. will be provided with this radio. This special cable suits the different impedances between the modern equipment and the receiver. Furthermore the two stereo channels flow into one without increasing the load to the input unit.

In 1891, the brothers Gerard and Anton Philips, started to produce the first incandescent bulbs in Eindhoven.
Later, Philips specialized in the production of electro- medical equipment, and in 1918 introduced the first X-ray tube.
In the following years, Philips began specializing in the broadcasting industry. In 1932 the company succeeded in selling over one million radio equipment and became the world’s first producer.
During the Second World War, Philips transferred to the Netherlands Antilles, and returned to the Netherlands at the end of the conflict.
In 1958 Philips was the only multinational to have a pavilion dedicated to the Expo in 1958 known as Le Poème Electronique.
In the second post- war period, began the production of the first televisions, then the launch of the music cassettes in 1963 and the production of the first integrated circuit in 1965.
In 1982 Philips launched with Sony the first compact disc player.
In 1984 Philips acquired the control of the German Grundig.
In the 90's Philips faced a financial crisis.
In 1991 it inserted on the market the Video CD and it is one of the first companies in the world to develop high definition television.
In 1999 Philips established a joint venture with LG Electronics, named LG Display, which ends in 2009.
In 2006 together with Sony launched the first Blu-ray.
In 2009 Phillips launched the first full-HD LCD TV in 21:9 format.
Phillips holds 48,000 registered patents.
Currently, the production is focused on low- energy lighting products and LED systems and services for diagnostics and production of medical devices.

The preamplifier consists of two stages. At the entrance, the volume potentiometer is equipped with three sockets for physiological correction (loudness). The intervention curves are visible in the first graph.
Philips considers the frequency of 800 Hz to be the center of the audible band, so the treble and bass controls are calculated to enhance the frequencies above and below that value. The choice of this frequency is very important for the musicality and the pleasantness perceived by listening to the device.
In the second graph the frequency response of the preamplifier, with the tones enhanced to the maximum. You notice the different equalization you get by listening to the AM bands (Long Waves, Medium, Short) or listening to the FM band and PHONO.

The final stages are two distinct, one for the low frequencies and one for the high frequencies. These amplifiers control separate speakers, a 26 cm woofer for the bass and three speakers for mid/high frequency, with the 17 cm front speaker disconnectable for 3D effect.
The most interesting feature of these final stages is that they are without an output transformer.

The feature that makes this device very interesting is that each final stage uses a pair of EL84 / UL41 in an ironless configuration, ie without an output transformer (the known critical point of the final stage).
The output stage uses the operating principle called Shunt Regulated Push-Pull (SRPP) used today in HIGH-END amplifiers.
The output transformer limits the bandwidth of the entire amplifier. The bass is limited by the inductance of the primary winding, the treble is limited by the parasitic capacitance resulting from the alternation of the primary and secondary windings. The alternating winding of the primary and the secondary windings is also necessary to improve the coupling and thus reduce the dispersed flow.
The reduction of the dispersed flow increases the damping. This is essential in the loudspeakers mounted inside the cabinet of the radios, which do not work in hermetically closed boxes, and which are therefore free to move almost without resistance from the surrounding air.

The two output tubes (EL84, UL41) of each channel, four final valves in total, are connected in series with DC-DC coupling. Each UL41 is configured as a triode.
The output is taken from the cathode of the UL41. The speaker has an impedance of 800 ohms, identical to the average impedance that occurs on the catode, whereby direct coupling (without transformer) is possible between the final stage and the loudspeaker.
The Philips Saturn 653 is therefore totally free of all the problems deriving from the output transformers.

The damping of the loudspeakers is kept high by the low dynamic resistance of the feedback loop.

The 21 cm loudspeaker, with a 23 mm diameter magnetic core, is placed at the front.
A front 17 cm mid-tweeter can also be switched off if you want to increase the 3D effect.
On the two sides, there are two elliptical tweeters pointing upwards. Radiating to the ceiling of the room to take advantage of the reflections of the environment that add to the direct radiation produce an expansion of the soundstage.
There are no dangers of stationary wave due to the working frequency of these speakers.

There are several options for connecting external speakers.
It is, in fact, possible to connect an external woofer, excluding or not the internal woofer while leaving all the other speakers active.
It is possible to connect external medium-high units, excluding or not the internal mid-tweeters, while leaving the internal woofer active.
It is possible to connect woofers and external medium-high units, excluding or not all, or some, internal speakers.

In the center of the speaker panel is the Magic Eye which indicates the perfect tuning of each station.
KLANGREGLER - Low Tone Indicator (FA Key) and High Tone Indicator (SOL Key).
Just below we find the large Volume knob, with built-in automatic loudness correction.
FERROCEPTOR - Indicator of the position of the internal ferrite antenna. This internal antenna (excludable with the HA key) is used in the OM and OL bands. The internal antenna must be rotated until the best tuning is achieved.
Just below we find the large knob of the Manual Tuning, whose movement is very pleasant being supported by a large flywheel

5080 - cn

Grundig 5…

5th 4月 201924th 4月 2023
by giovanni

The Grundig 5080 Hi-Fi Zauberklang is one of the most powerful devices produced by this brand.
Grundig used to produce different classes of equipment. Those of the 1xxx series are the cheapest, those of the 2xxx and 3xxx series are middle class, those of the 4xxx and 5xxx series are high class.
Of course, the 5080 Hi-Fi Zauberklang belongs to the best series, and it shows.

It is the most gifted of the Grundigs. Only the 4055 can compare, as for the power stage and the loudspeakers set, but without having the 5 bands equalizer, but having two FM dials.
All about the 5080 is designed for the best performance. The power stage with two EL84s in push-pull.
The 5 bands equalizer, even in this case no radio device has ever had more. (highlighted in yellow in the diagram).

Loudness circuit (highlighted in green in the diagram) on the feedback circuit (highlighted in red in the diagram), for an effective emphasis and contemporary distortion reduction.
An extra preamplifier stage to make the most of the actual capabilities of the push-pull to receive double the input signal.
A Medium Frequency stage more for a perfect tuning even in the most difficult situations.
The radio section is clearly at the highest level for the time, but listening to liquid or vinyl music is impressive.

Everyone remembers the famous Bose 901 box with 9 mini-woofers of 10 cm. With that many speakers they stimulated the imagination of us all when they were launched on the market.
Well, the Bose 901 had a radiant surface of 700 cm2. The sum of the surface of all the speakers together covered an area of 700 cm2.
The speakers of this Grundig cover an area of about 1100 cm2 ... excluding the two tweeters from the calculation!!!
The radiant surface is not everything, of course, but this extreme simplification can already give an idea of the performance this machine is capable of.

BLUETOOTH

Embed Bluetooth Receiver upon requests

MULTI PLATFORM CONNECTION

Each radio can be equipped with a cable for connection to any digital device.

- Bluetooth receiver embedded - The unit can be equipped with a BLUETOOTH receiver powered directly by the receiver power supply. This makes it possible to control the amplifier from any external digital device as an IPAD, a Smartphone, or a sophisticated multimedia station. So you can hear your preferred web station or your lossesless file without cables on the room. Wireless Receiver can be equipped upon requests.

- Multi Platform Connection - A customized adaptation cable to connect any digital device as Iphone, Smartphone, Laptop, CD Player etc. can be provided with this radio. This special cable suits the different impedances between the modern equipment and the receiver. Furthermore the two stereo channels flow into one without increasing the load to the input unit.

1930 - At 22 years old Max Grundig begin a radio repair business.
1939 - The II world War start. Grundig works primarily for the Wehrmacht and repair of telecommunication equipment.
1945 - Immediately after the war, the demand for repair work was very great. Max Grundig built the first two Grundig appliances: the Tubatest tube tester and the Novatest testing device.
1947 - Start the sale of a kit radio, the Heinzelmann. The unit is the basis of success, sold more than 15,000 pieces.
1950 - Very high frequency (VHF) is introduced to Germany and places new demands on the industry. Grundig launches the 380 W on the market.
1952 - The first television channel starts up in Germany. After intensive research, Grundig launches the FS 080 onto the market. In the same year the first portable tape recorder Reporter 500 L is created.
1956 - After a lot of radio produced with progrssively high performances was produced the Concert Radio 5080 equipped with an equaliser, which has five controls and a visual display.
1965 - A new factory is established in Braga, Portugal. The Satellit 205 is one of many appliances in the Satellit series. This product marks the beginning of Grundig production of high-quality global receivers.
1970 - The Audiorama 7000 Hi-fi was produced, it has twelve dynamic speaker systems in one speaker.
1976 - The Reel Tape Recorder TS 1000 is equipped for semi-professional use.
1980 - The slim-line Hi-fi Tuner ST 6000 and the Monolith Hi-fi Dynamic Flat Top Antenna, which has 22 speaker systems, are two particularly popular appliances in the new hi-fi range.
1984 - After severe drop in sales Philips increased its stake in Grundig 31.6 percent and takes over the corporate management.
1997 - Philips pulls out of its involvement with Grundig.
2003 - The company files for bankruptcy.
2008 - Turkey's Koç Holding took full ownership of Grundig Multimedia B.V., the parent company of Grundig Intermedia GmbH in Nuremberg.

Courtesy of: Grundig

Inside the cabinet there is a dipole for FM reception and a ferrite rotating aerial for AM reception.
Ferrite aerial can be rotated from the outside to achieve a perfect tuning of the device in the AM.
In this picture see the rotation mechanism and the position indicator of the aerial.
The reception sensitivity with internal aerials is very good. This unit was in fact produced in a period when there were not many radio stations and those available fairly apart from each others.
Using an external aerial sensitivity is further increased.

As indicated in the initial description, there are five speakers. They are placed on the three sides of the device.

The main cone is a huge elliptical broad-band measuring 31 x 19 cm. It is made of sturdy alloy and has an Alnico magnet.
The dimensions of the magnet are considerable and also the weight of the speaker reveals its sturdiness.
In fact, it has to support the energy given by two EL84s.
The curve of the cone is of the exponential type, as befits a very high quality broad-band.

The two electrostatic tweeters in front cover the highest audible frequency range.
On both sides there are two 25 x 17 cm broad-bands of Grundig production, also very efficient.

The final result is clearly a powerful sound, with very deep and fast bass.
The mid is also very clear and the voices are credible and highlighted, never mixed up.
The treble are bright but sweet, not strident.

An important musicality to be a radio.