The band selector switch is shown in FM position. However, the AM peak detection still required a solution. So when e.g. [E. Pohl article 1956], Price list of Philips radio valves from September 1955. In the centre the two (!) Although details are scarce, it seems that both Siemens and Telefunken re-sold the valve labelled as their own, probably to complete their offering. The TV reception chassis inside the TX701 was fully identical to that of the TX400/500, with 23 valves including the EQ80. For AM this were the ECH42 and EAF42, whereas the FM used three EF42's. Mullard in the UK and Valvo in Germany, although as far as can be seen only Philips in Eindhoven and Philips-Valvo in Hamburg produced the valve. 1^Grado Succ. Red lines indicate the signal path of the narrow band detector centred around 10,7MHz, using the right detector of the EBF80. Disposizioni attuative per la prevenzione e gestione dell’emergenza epidemiologica da COVID-19, SCUOLA SECONDARIA -Assemblea sindacale di giovedì 22 ottobre 2020- Avviso alle Famiglie su orari di ingresso delle classi, Alle Famiglie degli alunni della Secondaria di Primo Grado – Rinvio inizio laboratori pomeridiani e mensa al 26.10.2020, Comparto Istruzione e Ricerca – Sezione Scuola. 1^Grado SUCC. If g3 is positive, however, the electrons pass g3 and g4, where at g5 the same happens based on the second input signal. [Technisch Museum.nl], The sound chain of the Philips TD1410U, the last Philips platform to use the EQ80 FM detector. A derived version was launched as the UQ80, in the U-series with 0.1A heater current. When looking further into the specifications and applications of this tube it becomes clear this was one of the ultimate vacuum tube developments for consumer applications. Persone che, oltre alle competenze disciplinari specifiche, possiedano un metodo di lavoro spendibile con profitto in contesti diversi. I.C. On the lower row concept II, with two valves less and more complex valve-sharing in the front end section. It looks the same happened with the EQ80. As it looks the UQ80 version was hardly used if at all; I haven't found a single trace of it in practical sets. I will therefore try to picture the history of this tube, from its development to introduction and applications. Madisoft, Qualcosa non è accessibile? Based on the measurements and analysis of Dammers and Piet Hooijmans in the. [Marcel's TV Museum]. In particolare il Dirigente Scolastico organizza l’attività scolastica secondo criteri di efficienza e di efficacia ed è il titolare delle relazioni sindacali. Despite the extensive application support through the above booklet, practical use of the EQ80 in (FM) radios seems to have been rather limited. The problem is that these are much more difficult to find, so I will have to limit myself here to the single one described in the Philips Electronic Application Bulletin of January 1952 ", An entirely different application was discovered when Ite Weihe pointed me at the publication by E. Pohl of the University and the, The EQ80 used as three-fold coincidence detector for nuclear physics experiments. : TOIC878008 - Cod. TORINO - UMBERTO SABA on Twinkl. Mecc. The EQ40, the Rimlock version of the tube, with al-glass base and on the right the "pimple" for the pinning reference. Although this application also clearly shows the capabilities of the EQ80 as coincidence phase detector, the problem probably remained as it was for FM detection: technically a perfect solution, but too expensive, and also achievable with cheaper valves. TORINO - UMBERTO SABA ,TORINO: Find the telephone number, address, website details and more for I.C. Dettaglio Nota 5 novembre 2020, n. 1990, IC Saba -Aggiornamento del regolamento sulle misure di contenimento e prevenzione del contagio – Manuale Covid 19 revisione n. 8 del 6.11.2020, Comunicazione Genitore eletto Rappresentante di Classe a.s. 2020-21 – Classe 3 A Sec. In questa sezione in aggiornamento verranno fornite indicazioni relative alle misure di prevenzione COVID per un rientro in sicurezza. Vista l’Ordinanza del Ministro della Salute del 4.11.2020, da domani venerdì 6.11.2020 a venerdì 20.11.2020, per le classi seconde e terze della secondaria di primo grado, “le attività scolastiche e didattiche si svolgono esclusivamente con modalità a distanza” (DPCM 3.11.2020 art. Note that the cover depicts a symbolic representation of the EQ80, with on the left an FM signal going in and on the right the demodulated signal. The same still happens today in IC integration, where there is for each function (or set of functions) an economic limit for profitable functional integration. Mecc. Still Hfl 9,50 (Dutch guilders, so roughly 4,5USD) was a considerable price at the time, not to speak of the 20,00 Hfl for the EQ40! The output load circuit, which is R4 in parallel with the anode-to-ground parasitic capacitance, will act as a low pass filter and filter out the IF and its harmonics, leaving only the detected audio signal at the input of the next stage. This concept uses a resonant circuit, tuned to the central intermediate frequency of the FM signal where the anti-phase signals at both ends (V4 and V5) are each peak-detected by a diode and their outputs subtracted. Interestingly (or maybe not) the circuit used in the August 1948 home built TV, in line with the latest reference design, is almost identical to the circuit concept of Fig10. Questo sito o gli strumenti terzi da questo utilizzati si avvalgono di cookie necessari al funzionamento ed utili alle finalità illustrate nella cookie policy. As said earlier, the new 625-line "Gerber norm" TV standard used FM for the sound carrier, and thus an FM-detector in the receiver. The circuit concept is shown on the right, where 1 and 2 are the two tuned branches of the double-tuned BPF. ISTITUTO COMPRENSIVO STATALE "UMBERTO SABA" - TORINO - Via Lorenzini 4, Torino - 10147 (TO) Cod. [Philips Radiobuizenlab Report Q-46S-II March 1949]. sindacale 22.10.2020, Rinvio laboratori pomeridiani e mensa SEC, Sito realizzato da This was exactly the ambition of the project by Dammers and Hooijmans, which they explain as follows: Essentially what they tried to achieve was implementing the combined AM-FM reception, This is almost certainly the AM/FM-receiver prototype. Questo sito o gli strumenti terzi da questo utilizzati si avvalgono di cookie necessari al funzionamento ed utili alle finalità illustrate nella cookie policy. Since my father never threw away anything of interest, I'm happy to possess the reports from his days at Philips Radiobuizenlab as well as the EAB journals, which were an invaluable source of information when writing this story. The EQ80 price has not changed, but the EQ40 can no longer be ordered. Persone che comprendano l’importanza di investire continuamente nella propria formazione ed abbiano gli strumenti culturali e metodologici per farlo, con lo scopo di dare il proprio fattivo e consapevole contributo alla società di cui fanno parte. The ultimate model was the FX840 (also built in Italy as FI840), which was a combined AM (seven bands! The Philips TX400U, affectionately called "het hondehok" (dog cage). Fisc.80090760010 - Cod. 1^grado, dal 6.11.2020, Comunicazione Genitori eletti Rappresentanti di Classe/Interclasse a.s. 2020-21, Alle Famiglie – Nuovo modulo della Regione Piemonte da utilizzare per l’assenza da scuola degli alunni, Rendiconto contributo Famiglie a.s. 2019-20, Laboratori pomeridiani Sec. In the reference book on Philips Electronic Valve technology by J. Jager from 1953 ", Television reference block diagram showing both the EQ80 and the EB91 for FM detection. If the g3-voltage is negative the electrons will be reflected and absorbed by g2. Dal 5 ottobre mascherine obbligatorie anche all’aperto vicino alle scuole Si rende noto che entrerà in vigore lunedì 5 ottobre l'ordinanza della Regione Piemonte che introduce l’obbligo di indossare la mascherina anche all’aperto in tutte le aree pertinenziali delle... Video tutorial per procedura accesso account G-Suite della scuola secondaria di I grado "I. Nievo". Bert Dammers (1910-1968), the first boss of my father in the Radiobuizen-Lab, and later the famous head of this organization that became known as the "Dammers-lab". This was solved by using a third diode, available in the EABC80 diode (A) dual diode (B) triode (C) combi valve. The main differences in my father's TV are (1) a damping resistor of 15k in the g3 tuned circuit (2) an additional anode capacitor to ground of 56pF, likely to give stronger LPF action at the output and (c) insertion of the volume control potentiometer in the anode output. This settled the FM detection, requiring a EB41 high transconductance dual diode, much cheaper than the EQ40 enneode. Most of them were in Germany (Saba, Siemens, Graetz), Switzerland (Albis, a JV between Telefunken and Siemens, Tonfunk) and Italy (Irradio, Magnadyne, Minerva). Dirigente: Prof.ssa Maria Rosa Curello. 3 punto f.), con sospensione delle lezioni in presenza. IC Saba-Torino Orario lezioni inizio a.s.19-20. The slightly larger TX500U had a 31cm (12") picture tube. Circuit diagram of concept I for an AM/FM radio receiver with Silent Tuning. The separate diode (A) with a floating (non-grounded) cathode was used for one of the ratio detector branches, the two grounded dual diodes for the second ratio detector branch and the AM peak detector. The mere fact that Piet Hooijmans was working hard on the applications of the EQ80 was unfortunately not enough to guarantee its broad use. A high intensity MW6-2 projection tube illuminated via three mirrors and one lens a 45x34cm screen. Nel rispetto delle competenze degli organi collegiali scolastici, spettano al dirigente scolastico autonomi poteri di direzione, di coordinamento e di valorizzazione delle risorse umane. Below left from right to left the sound IF line-up as per the circuit diagram below. added pictures of the SABA FM module with the EQ80. In green the resulting bias voltage for the control grid of the EQ80, which is 0V in case of no signal and up to 4V in case of maximum signal. L’Istituto Comprensivo Statale D’Azeglio – Nievo di Torino nasce il 1° settembre 2019 dalla fusione della Direzione Didattica Statale D’Azeglio e parte della Scuola Secondaria di 1° grado Matteotti-Nievo, entrambe di Torino. In 1960 the EQ80 was still for sale, seven years after its last known application, so this must primarily have been for service replacement of valves used in the first generation TX400, TX500 and TX1410 TV sets. When the input signal is equal to the centre frequency of the resonant circuit the two output signals are equal and in anti-phase and the output is zero. The most complex design (number I) is apart from some minor details identical to the reference design of Dammers and Hooijmans above: three EF42's for the FM RF-IF chain followed by the EQ80 and an EL41. Which was at the time (1951) a wide screen! The first topology is the one used in the, FM audio channel of the 1948 Home Built Television Receiver of Piet Hooijmans. Below is explained where they come from. The EQ40 is thus principally operated in the saturated regime, linked to the FM detection which needs to suppress AM as much as possible. 1^Grado V. Lorenzini – Ingresso e uscita per gli alunni di TUTTE le classi, dal 18.11.2020 fino al termine del periodo in “zona rossa”, Alle Famiglie delle Classi 1^ B e 1^ C Plesso Sec. Il dirigente controlla le risorse finanziarie concesse dallo Stato alla scuola a lui affidata, e deve fare periodicamente resoconto del bilancio al Consiglio d’Istituto. faccelo sapere. The only difference is that the EAF42 has been replaced by an EBF80 and an EM34 tuning indicator has been added. The result is a sine-shaped detection curve around the centre frequency, which can be approximated as linear for limited frequency excursions around the zero-crossing. [NVHR collection]. Saba” è comodamente raggiungi-bile con i mezzi di trasporto GTT Linee: 75 - 52 - 10 Temi e AttivitA' proposte Throughout the BELL Beyond Teachers Workshop, the participating teachers will be able to see how the BELL Beyond methodology can be used in the classroom in different areas of study to aid students in their learning of the English language. The most uncommon element in the reference design are the resistors R2 and R3, which provide a DC-path between g2-g4-g6 and the cathode. Because indeed these sets were really for the high end of the market, with sales prices of 1500 (for the FX824) to 2200Hfl (for the FX840), in today's money the price of a small car! IC Saba-Torino Orario lezioni inizio a.s.19-20. Note the different g1, g3 and g5 bias voltages of -5 and -18V. The net effect of all this is that the electron beam only reaches the anode when BOTH g3 and g5 are positive: In essence, the EQ40 can be considered as two stacked (or series connected) pentodes. Leggi Tutto... Ai Genitori che hanno ottenuto il voucher scuola Regione Piemonte – Chiarimenti sulla tempistica di spesa. Il Dirigente Scolastico Veronica Tania Roberta SOLE riceve, previo appuntamento, presso la sede centrale di via Mentana 14, DSR_10 - Organizzazione didattica della scuola secondaria di I grado e altre disposizioni del nuovo DPCM per tutte le classi, ord._n._123_del_30_ottobre_2020_scuole_v2, IC DAzeglioNievo Regolamento-DDI definitivo, Circolare DSR_7 - Uso continuativo delle mascherine e ricambi d’aria.docx. Madisoft, Qualcosa non è accessibile? This is then immediately one of the biggest weak points of the EQ40: it requires a relatively - compared to most other tubes in the regular TV receiver line up - high grid voltage. At this stage, it is interesting to explore how the EQ80 FM detector application circuit developed over time. B4 and B5 are EF80 intermediate frequency amplifiers, B6 is the EQ80 FM detector and B7 is the EL42 audio power amplifier. It used a 22cm (9") diagonal picture tube. added radio application info based on the booklet on new Philips valves for FM Radio that I got from Oswald Moonen, including Silent Tuning function and reference design. (Probably) early 1948 my father, under the supervision of his boss Dr. B. The EQ40 was formally launched in April 1949, when a first article appeared in the Philips Electronic Application Bulletin (EAB) targeted at the internal Philips set development organizations: ", The external connections and dimensions of the EQ80. Meccanografico: TOMM878019 The most urgent application of the EQ40/EQ80 was the Television Receiver, because Philips really wanted to push that technology to avoid competitors taking the lead in this new application. It probably dates from 1949. I dare to suggest this was likely the ultimate radio receiver design using the EQ40/EQ80. 7. Forty years ago, when carefully looking inside my fathers old home-built TV receiver, I was always intrigued by the EQ40, especially when my father told me this was the only nine-electrode enneode valve ever developed. 1^ Grado- Organizzazione ingressi/uscite delle classi in emergenza sanitaria, dal 26.10.2020, Aggiornamento del regolamento sulla sicurezza IC Saba – Manuale Covid 19 revisione n. 7 del 20.10.2020, Decreto del Presidente della Giunta Regionale 16 ottobre 2020, n. 110 – Linee di indirizzo per la fase successiva alla riapertura delle scuole in Piemonte. Se vuoi saperne di più o negare il consenso a tutti o ad alcuni cookie, consulta la cookie policy. Below is the circuit diagram of a reference AM/FM receiver, as presented in the Electronic Application Bulletin article ", Philps reference design of an AM/FM receiver from EAB 1951, no longer using the EQ80 but the EABC80 valve. Se vuoi saperne di più o negare il consenso a tutti o ad alcuni cookie, consulta la cookie policy. Unfortunately, especially radios had to be dual mode and provided the highest volumes, so this was a major blocker for using the EQ80. [Technisch Museum.nl], The valves used in the TX1410/U version for Italy. The problem that silent tuning solves is so called "False Locks" of the FM detector, see the bottom graph on the right. [Pieter Hooijmans private collection]. have added chapter navigation and links to my other pages on television history for better cross-referencing, have added the pictures of the price lists. Interestingly the price of the EQ80 had not changed in these 5 years, price erosion was apparently not as tough as it is today. On the right chassis corner the EQ80 is visible. Philips Radiobuizen Lab I Report Q-46S-II. [Errgas blog], Silent tuning as practically implemented in the FX824. Finally, Philips registered the EQ80 according the US coding system as 6BE7, although no applications under this name are known either. Per i motivi di assenza non contemplati nel presente modulo, le Famiglie sono tenute a giustificare sul diario, come di consueto. On the far left is the EQ80. Il dirigente scolastico, inquadrato nella dirigenza dello stato (Area V della Dirigenza), è. responsabile della gestione delle risorse finanziarie e strumentali e dei risultati del servizio. For Vg larger than the knee voltage the anode current is then essentially independent of the input voltage. 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[NVHR collection], Price list of Philips radio valves from March 1960. As it seems the ratio detector was chosen by Philips to become the standard frequency discriminator. [Philips booklet "Receiving tubes for FM" 11-1950]. added the Radiobuizen Lab RBL6 reference design that I discovered in Volume IIIC of the Philips Electronic Valves series. Because both detectors have a much lower conversion gain than the EQ80, the triode was used as additional LF audio amplifier, boosting the input signal for the EL41 power amplifier. Il Consiglio di Istituto in data 28 settembre ha deliberato l'integrazione al Regolamento di Istituto recante misure di prevenzione e contenimento della diffusione del SARS COVID-2 Il documento è pubblicato nella sezione Regolamenti alla pagina... L’accesso ai servizi di segreteria è garantito a distanza e per via dematerializzata, solo per esigenze indifferibili sarà garantito in presenza secondo l’orario di ricevimento e previo appuntamento. For details of their work see Report 2 ". Under that condition the tube can be considered to be an (analogue) AND-gate; only if both inputs are high the output is high, see Fig. But when the instantaneous frequency deviates from the centre frequency the vectors V2 and V3 will rotate around V1, resulting in V4 and V5 of different amplitude. Investigations have almost certainly continued in this direction, but after dropping the original boundary condition that no extra valves were allowed. ISTITUTO COMPRENSIVO STATALE "UMBERTO SABA" - TORINO - Via Lorenzini 4, Torino - … Overall the (EF42) input to (EQ40) output conversion gain is very high, and in all cases much higher than the passive frequency detectors. Fatturazione: UF34BV - Codice IPA : istsc_toic878008 Tel: 011-296470 - Fax. My interpretation from this is that the initial measurements as reported were done on what we would call today "beta versions" of the EQ40 valve. Per ragioni organizzative, in via temporanea e fino al termine del periodo in “zona rossa”, sempre nel rispetto dell’obbligo di distanziamento e del divieto di assembramento, le classi 1^B e 1^C da lunedì 16.11.2020 entreranno e usciranno dal portone di V. Fea 2 (ingresso ordinario). Chiudendo questo banner, acconsenti all’uso dei cookie. The FM-detection function can also be performed with cheaper valves, and for dual mode AM/FM receivers the EQ80 made things unacceptably complex. The EQ80 will now translate this phase difference phi into an anode current variation as described earlier, where the output signal is identical to the original audio modulating signal. In The Netherlands, driven by Philips who wanted to demonstrate these new technologies in their home country, commercial television was introduced in 1951 (after experimental transmissions had started in Eindhoven in 1948) while the first FM transmitter came on-air in 1954 (in Hulsbergen, near Maastricht). In questa sezione in aggiornamento verranno fornite indicazioni relative alle misure di prevenzione COVID per un rientro in sicurezza. Chiudendo questo banner, acconsenti all’uso dei cookie. Che di conseguenza la collaborazione è più importante della… DISPOSIZIONI INTERVENTO SU CASI SOSPETTI DI CONTAGIO DA SARS-COVID-19 INFORMAZIONI ALLE FAMIGLIE Nella circolare allegata... Istituto Comprensivo Statale "D'Azeglio - Nievo", Via Mentana 1410133 Torino (TO)Tel: +39 011 6602003, Ministero dell'Istruzione, dell'Università e della Ricerca, © 2018 Argo Software - Portale realizzato con la piattaforma Argo Web - Template Italia configurato sul tema accessibile EduTheme V.2.4 (Mars). Conceptually the EQ40 enneode can best be pictured as two stacked pentodes. Questo sito o gli strumenti terzi da questo utilizzati si avvalgono di cookie necessari al funzionamento ed utili alle finalità illustrate nella cookie policy. 2002), la principale missione che il nostro istituto si propone con la propria azione educativa è quella di sviluppare al pieno quelle competenze che la più moderna riflessione pedagogica considera ormai un prerequisito indispensabile per un organico e consapevole inserimento nella società e nel mondo del lavoro. n. 1990 del 9.11.2020 – Uso delle mascherine. The Philips FX824A combo: an AM/FM radio plus record player. Sito realizzato da The anode current essentially exists of very short pulses with a repetition frequency identical to the instantaneous intermediate frequency (see Fig7 above) and a width determined by phi. [Collection Oswald Moonen]. È sua la firma sotto ogni circolare o documento emesso dalla scuola, e di conseguenza è anche sua la responsabilità su ciò che i documenti dicono. Second page from the Philips Report Q-46S-II, describing the FM detection curve shifts with the original constant winding speed EQ40. Grid g4 has the same function as g2, while g6 and g7 are the classical pentode screening grids to suppress secondary emission. Overview of the radio concepts presented in the "Receiving tubes for FM" booklet. Philips reference design of an AM-FM radio receiver found in the back of the earlier report on this topic by Dammers and Hooijmans. The design is roughly in line with the recommended Philips application. There was a second chassis with 9 valves providing the 25kV supply voltage for the MW6-2. Madisoft, Qualcosa non è accessibile? The first control grid g3 for the first signal determines what the electrons will do next. [Philips Electron Valves Division booklet "Receiving Tubes for FM" 11-1950]. Two of the concepts from the booklet using the EQ80 that have been worked out in detail. The caption says it is for Short Wave (KG), Medium Wave (MG) and FM reception. I had never realized that the EQ80 was so intimately linked to the first television and FM radio receivers, and that it is thus part of a very exciting period in the development of consumer electronic devices we take for granted today. Per ragioni organizzative, in via temporanea e fino al termine del periodo in “zona rossa”, nel rispetto dell’obbligo del distanziamento e del divieto di assembramento, gli alunni di TUTTE le classi da mercoledì 18.11.2020 entreranno e usciranno esclusivamente dal cancello di Via Lorenzini 4 (ingresso ordinario). In the upper right corner the sound section, with an EF80 IF amplifier, the EQ80 and two ECL80's.
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