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Presse Hell printers (such as the ubiquitous T empf 14) are "printer-only". They do not contain circuitry for detecting Hell-pulses and driving the printer-solenoid. They cannot simply be hooked up to the loudspeaker output of a radio receiver. A "Zwischengerät" or "Tastgerät" (keying device) must be placed between the a radio receiver (or phone line) and the printer, or a special "Hell-Empfänger" (Hell-receiver) with built-in detector and driver must be used.
[Minerva 499] [Telefunken E11 1/48] [Telefunken EPH/L/2] [Telefunken Ae 1076]
[Telefunken E 415 Rö] [Telefunken E 376 SII] [Telefunken E 515 X]
[DNB / Telefunken E38] [Telefunken E 10 K 3] [Telefunken E P K 1]
[Siemens-Hell Funk empf 61 ] [DENA E3] [Lorenz Ln 21021 "Schwabenland"] [Lorenz Lo6L39]
If you have any additional information or documentation about radios that were used with the Presse-Hell, please contact me!
This radio set was manufactured by Minerva-Radio of Vienna/Austria, but marketed and distributed by Siemens-Halske. Minerva-Radio Co. was originally named "Minerva, Radiola-Radioapparate und Bestandteile W. Wohlleber & Co.", founded in 1919 in Vienna/Austria. It became part of Grundig in 1968. Some of their radios were built (starting pre-WW II) under license in Switzerland, Italy, France and Poland.
The 499 SH is a fixed-station receiver for the long wave, medium wave and short wave bands. Hence it is referred to as an Allwellenempfänger, i.e., a general-coverage receiver. It covers the frequency range of 72.5 kHz to 27.2 MHz (AM/SSB: modulation types A1, A2, A3), with automatic RF gain control. Model 499 SH was introduced in 1941, as was model 499 GW.
The Minerva 499 SH general coverage receiver
The unit is relatively large (76x35x33.5 cm, ≈30x14x13") and heavy (35 kg, ≈77½ lbs). It operates on 110-240 Vac (switchable), 50 Hz. Siemens also sold 12 Vdc inverters for operation from a car battery. The receiver does not have a built-in loudspeaker; it has loudspeaker and headset outputs, and a separate audio output stage for a Presse Hellschreiber. The circuitry is built around 9 tubes ("valves"): EF13, ECH11 (2x), EBF11 (2x), EL11 (2x; equivalent to EL3N of the famous Philips "red series"), AZ12, and EW499SH (filament current regulator for the ECH11 oscillator tubes). In addition, it has an EM11 green "magic eye" tuning aid and a TE30 "neon" antenna static protection. Model 499 GW (same vintage) has a slightly different set of tubes (CL4 instead of EL11, and CY1 instead of the AZ12 and EW499SH).
On the
back of the unit, there is a simple output jack marked "Hell-Schreiber
Anschluss". There is also a round 12-pin connector that looks like the male
counterpart of the connector on the front of the Feld-Hell; the pin-out is not
clear from the schematics...
Telefunken Presse-Hellempfänger E11 1/48 - front and rear view (rear cover
removed)
(Figure 4 and 5 in ref. 2)
stands
for
Empfänger
Presse-Hell
/
Langwellen.
It was manufactured in 1949 and 1950.
This is a 4-tube
/
5-stage heterodyne receiver for the 40-160 kHz band (Longwave). Heterodyne ("Überlagerer")
receivers use
a local oscillator (Beat Frequency Oscillator, BFO) and a
mixer, to make on-off keyed unmodulated telegraphy pulses (A1 modulation)
audible
- in this case at 2.6 kHz. The
receiver only has a headphone output; it does not
have a loudspeaker. The IF is 35 kHz. Receiver bandwidth is 300
Hz. The DC-current output to the Presse Hell printer is passed through a mA meter
on the front panel of the radio. Like the
E11-1/48, it is an “Allstromgerät”.
Apparently there has also been a model E 10 K 3 and EP K 1, but I have no information on those (yet). If you have any additional information or documentation that would be appropriate for this particular page, please contact me.
Telefunken Presse-Hellempfänger EPH/L/2
(Presse Hell printer T empf 14 on left; Figure 11 in ref. 2)
Model
Ae 1076 is an "Allwellen-Empfänger"
(general coverage receiver) for A1/A2/A3 modulation (unmodulated
& modulated CW, AM). It
covers 171.5 - 566 kHz and 706 kHz - 23.600 MHz,
plus one fixed frequency (crystal). The receiver comprises 8 tubes - including
the "magic eye" tuning indicator - and 9 stages. It has a BFO, manually variable
IF-bandwidth, AGC, and manual RF gain. It does not have a built-in loudspeaker.
The front panel has outputs for a headset and a loudspeaker. It has a metal
housing that measures 300x585x335 mm (≈ 12x32x13") and
weighs 22 kg (≈ 49 lbs). It operates on 110/125/150/220/240 Vac
(selectable), 85 W. Ref. 5, 6.
"Ausführung
3" (version 3) of the Ae 1076 includes the
optional module Az 1085.
This is a "Hell-Zusatzgerät" that converts received
Hell tone pulses into DC pulses, that are
output to a Presse-Hell printer. This module comprises one EF 12 tube
(AF pentode). The Ae 1076 rear panel photos below show the area reserved for the
Az 1085 and the associated switch and connector. Ref. 7, 8.
Telefunken Ae 1076 - front panel
(photos courtesy
"USSR
Military, Tube and Transistor Radio")
Telefunken Ae 1076 - rear panel
Telefunken Ae 1076 - part of rear panel reserved for an Az 1085 module
Telefunken Ae 1076 - rear panel removed (Az 1085 not installed)
This
is a "Telegrafie-Empfänger", i.e., a telegraphy receiver. It was intended for
Morse printers, Hellschreiber printers, and general broadcast. There were
actually four types of this receiver, each covering a different frequency range
- primarily long wave. Type I: 42-79 kHz, Type II: 77-142 kHz, Type III:
135-254 kHz, Type IV: 240-451 kHz. Frequency range is determined with a set of
coil. The sets are easily exchangeable. The receiver comprises seven tubes: 6x
CF 7, 1x CL 2 (AF stage), 1x CY 1 (rectifier). It has a BFO
and variable IF (±2 kHz). It has a transformer-coupled 4000 Ω audio output for a
Hellschreiber. The manually variable gain is such that 90 V (!) appears at this
output. It is powered by 110/220/240 Vac, or 220 Vdc (selectable). Page 7
in ref. 9 suggests that this expensive radio (1200 RM in 1937, 8-9 months salary
for an average worker at that time) included a power supply, but was not
delivered with tubes!
Telefunken E 415 Rö
(source: ref. 10)
This
is an "Einkanalempfänger", i.e., a receiver for a single frequency. The receiver
was tuned to the customer-specific frequency (in the 60 - 200 kHz range) at the
factory, with fixed-value capacitors. The receivers has five tubes: 2x RE 074,
2x RE 034, 1x RE124. For frequencies below 75 kHz, the RE 074
tubes were replaced with RE 084 tubes. It is battery-powered. In 1937,
this radio could be had for a mere 395 RM (ref. 9), nearly 3 months salary of an
average worker at that time.
Left to right: Telefunken radio receiver E 376 SII, keying amplifier, and
"Siemens-Hell"
printer
(source: figure 5 in ref. 14; also: figure 20 in ref.
15 )
A similar set-up, this time with an T empf 12 Presse-Hell-printer
(source: figure 9 in ref. 9)
Telefunken E 376 SII
(source: ref. 11)
This
is a superhet "Presse-Empfänger" (press agency
receiver) for the 42-125 kHz frequency range. Ref. 12, 16.
With its BFO ("Überlagerer"), It is suited
for modulated and unmodulated telegraphy (CW, AKS) and for "the most modern method for sending messages
fast and error-free: Siemens-Hell-Schreiber".
The receiver has seven tubes: 2 x ACH 1, 2 x AF 7, 1x AL 4, 1x AB 2, 1x AZ1 (rectifier). The unit is powered by 110/125/150/220/240 Vac, 50-100 Hz. A DC-AC inverter ("Wechselrichter") of type WR 3 could be used for operation from DC mains power.
Telefunken E 515 X
(source: ref. 16, ref. 17)
Control on the front panel are (left to right): volume and tone (coaxial knobs, with push-pull on/off switch), mode selector (DC-pulse printer, tone-pulse printer / loudspeaker, broadcast reception with headset or loudspeaker), frequency tuning, and bandwidth.
At the time of purchase, a set of spare tubes and one or two EH 420 headsets could be ordered.
Right to left: T empf 14 with Funk empf 61 and KW-Vorsatzgerät
(source: figure 3 in ref. 1)
 |
Ref. 1: page 14 in "Siemens-Hell-Schreiber (T empf 14) - Beschreibung und Betriebsvorschrift" [incl. description of Funk Empf 61], Siemens-Halske AG, Wernerwerk F, Te 11/46, WWT. 1000., S. 47. 1494 Reg.-Nr. 115, November 1946, 21 pp. (courtesy Heinz Blumberg, DC4GL) |
DNB E38 receiver with a Hell-printer
(source: ref. 13)
LORENZ LN 21021 "SCHWABENLAND"
"Der Kurzwellenempfänger Ln 21021 „Schwabenland“ [1] der ehemaligen Deutschen Luftwaffe wurde baugleich bei der Deutschen Kriegsmarine unter der Bezeichnung EO 8268 eingesetzt. Der Empfänger wurde von der Firma C. Lorenz A.G. in den Jahren 1941/42 produziert." [Treytel]
Shortwave receiver Ln 21021 "Schwabenland"
Row of Presse Hell printers and LN21021 receivers in Hellschreiber-room of the DPD in Hamburg -
(source: cover page of ref. C)
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Ref. A: "Kurzwellenempfänger "Schwabenland" - Beschreibung, Wirkugsweise und Bedienung", Beschreibung Nr. 75/628, Ausgabe 2, C. Lorenz AG, Berlin-Tempelhof, April 1943, 40 pp. Source: www.cdvandt.org |
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Ref. B: "Kurzwellenempfänger Ln 21021 (Schwabenland)", Peter Treytel, October 2008, 37 pp. |
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Ref. C: Hochfrequenztechnik und Funk-Praxis - Zeitschrift für Funktechnik, Vol. 1, Nr. 14, December 1948 [also has 3 page article] |
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Ref. 1: "Beschreibung des Allwellenempfängers Minerva 499 SH - Spezialempfänger für Schreibempfang insbesondere Siemens-Hell", Minerva Radio, Siemens & Halske AG, Wernerwerk T, 47 pp. [product description + schematics] (courtesy Heinz Blumberg, DC4GL) |
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Ref. 2: “Entwicklung kommerzieller Empfänger”, H. Hart, G. Schaffstein, G. Vogt, Telefunken Zeitung (technisch-wissenschaftliche Mitteilungen der Telefunken GmbH), Jg. 23, Heft 87/88, September 1950, pp. 83-92 (incl. “Telefunken Presse-Hellempfänger E11-1/48“ and “Presse-Hellempfänger EPH/L/2”) |
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Ref. 3: "Schaltplan Röhren-Heimempfänger Telefunken Presse-Hell-Empfänger E11-1/48" [receiver schematic], 1948. |
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Ref. 4: "Funktions-Schaltbild des Presse-Hellempfängers EP/H/L2" [receiver schematic], p. 87 in ref. 6 |
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Ref. 5: "Kurz- und Langwellen-Empfänger Type: AE 1076", Telefunken product brochure W.B. 250 D (2000), C 0979, 3/1947, 3pp. |
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Ref. 6: "Beschreibung und Betriebsvorschrift für Empfänger AE 1076", Telefunken GmbH, Berlin-Zehlendorf, 6/1943 [here only Appendix 1 "Allgemeines", pp. 5, 6; appeared in "50 Jahre Telefunken" ??] |
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Ref. 7: "Schaltbild des Zusatzgerätes Az 1085 für Hell-Schreibempfang" [low resolution], Appendix 2 of ref. 6. |
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Ref. 8: "Kommerzielle Nachrichtengeräte von 1897-1945", Gerhard B. Salzmann, 2004 |
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Ref. 9: "Siemens-Hell-Schreiber", Fernmeldetechnik, Siemens & Halske A. G., Wernerwerk, Berlin-Siemensstadt, 2. 37. 5. T., SH6592, 1937, 7 pp. |
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Ref. 10: "Telefunken Telegrafie-Empfänger Type: E 415 Rö", 2-page Telefunken product brochure, W.B.158 D (2000), April 1936 |
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Ref. 11: "Einkanalempfänger für den Empfang einer Welle im Bereich von 1500-500 m Type E 376 S II", 2-page Telefunken product brochure W.B. 101 (1000D), January 1939. Source: www.cdvandt.org |
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Ref. 12: "Telefunken Presse-Empfänger E 515 X", 3-page Telefunken product brochure, November 1939. Source: www.cdvandt.org |
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Ref. 13: "Die Einführung des Hell-Schreibers vom DNB aus gesehen. Rückschau auf den ersten Betriebsmonat", p. 36-38 in "Der Zeitungs-Verlag: Fachblatt für das gesamte Pressewesen", Vol. 42, Nr. 4, 25 January 1941 |
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Ref. 14: "Voici "des machines à écrire" pour télégraphier soi-même de son domicile" [machines for teleprinting yourself at home], Paul Lucas, La Science et la Vie, No. 209, November 1934, pp. 406-410. |
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Ref. 15: "Die Fortentwicklung des Fernschreibverkehrs über Draht und drahtlos“, P. Storch, Elektrotechnische Zeitschrift (ETZ) [Hellschreiber, Handsender, Lochstreifensender on pp. 141-143], Jg. 55, Heft 5, 1 February 1934, pp. 109-112, 141-143 [also contains results of transmission trials] |
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Ref. 16:
"Siemens-Hell-Schreiber",
F. Berck, pp. 237-240 in "Elektrotechnische Zeitschrift (ETZ)",
Vol. 61, Issue 10, 7 March 1940
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Ref. 17: "Stand der Siemens-Hell-Fernschreibtechnik", Rudolf Zimmerman, Siemens & Halske A.G. - Wernerwerk, Technische Mitteilungen des Fernmeldewerks, Abteilung für Telegrafengerät, SH 7997. 0,5. 1043. TT1. M/1401, May 1940, 10 pp. (courtesy Siemens Corporate Archives, München) |
©2005-2011 F. Dörenberg N4SPP
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